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Provide tags and a correct Python 3 solution for this coding contest problem.
Petya loves hockey very much. One day, as he was watching a hockey match, he fell asleep. Petya dreamt of being appointed to change a hockey team's name. Thus, Petya was given the original team name w and the collection of forbidden substrings s1, s2, ..., sn. All those strings consist of uppercase and lowercase Latin letters. String w has the length of |w|, its characters are numbered from 1 to |w|.
First Petya should find all the occurrences of forbidden substrings in the w string. During the search of substrings the case of letter shouldn't be taken into consideration. That is, strings "aBC" and "ABc" are considered equal.
After that Petya should perform the replacement of all letters covered by the occurrences. More formally: a letter in the position i should be replaced by any other one if for position i in string w there exist pair of indices l, r (1 ≤ l ≤ i ≤ r ≤ |w|) such that substring w[l ... r] is contained in the collection s1, s2, ..., sn, when using case insensitive comparison. During the replacement the letter's case should remain the same. Petya is not allowed to replace the letters that aren't covered by any forbidden substring.
Letter letter (uppercase or lowercase) is considered lucky for the hockey players. That's why Petya should perform the changes so that the letter occurred in the resulting string as many times as possible. Help Petya to find such resulting string. If there are several such strings, find the one that comes first lexicographically.
Note that the process of replacements is not repeated, it occurs only once. That is, if after Petya's replacements the string started to contain new occurrences of bad substrings, Petya pays no attention to them.
Input
The first line contains the only integer n (1 ≤ n ≤ 100) — the number of forbidden substrings in the collection. Next n lines contain these substrings. The next line contains string w. All those n + 1 lines are non-empty strings consisting of uppercase and lowercase Latin letters whose length does not exceed 100. The last line contains a lowercase letter letter.
Output
Output the only line — Petya's resulting string with the maximum number of letters letter. If there are several answers then output the one that comes first lexicographically.
The lexicographical comparison is performed by the standard < operator in modern programming languages. The line a is lexicographically smaller than the line b, if a is a prefix of b, or there exists such an i (1 ≤ i ≤ |a|), that ai < bi, and for any j (1 ≤ j < i) aj = bj. |a| stands for the length of string a.
Examples
Input
3
bers
ucky
elu
PetrLoveLuckyNumbers
t
Output
PetrLovtTttttNumtttt
Input
4
hello
party
abefglghjdhfgj
IVan
petrsmatchwin
a
Output
petrsmatchwin
Input
2
aCa
cba
abAcaba
c
Output
abCacba
Tags: implementation, strings
Correct Solution:
```
import sys
from math import *
def minp():
return sys.stdin.readline().strip()
def mint():
return int(minp())
def mints():
return map(int, minp().split())
def same(a, b):
return a.lower() == b.lower()
n = mint()
w = []
for i in range(n):
w.append(minp().lower())
s = minp()
g = [False]*len(s)
c = minp()
for i in w:
for j in range(len(s)-len(i)+1):
if s[j:j+len(i)].lower() == i:
for k in range(len(i)):
g[j+k] = True
r = ''
for i in range(len(s)):
if g[i]:
x = s[i]
if x == c.lower():
if c.lower() == 'a':
r += 'b'
else:
r += 'a'
elif x == c.upper():
if c.lower() == 'a':
r += 'B'
else:
r += 'A'
elif x.islower():
r += c.lower()
else:
r += c.upper()
else:
r += s[i]
print(r)
```
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Petya loves hockey very much. One day, as he was watching a hockey match, he fell asleep. Petya dreamt of being appointed to change a hockey team's name. Thus, Petya was given the original team name w and the collection of forbidden substrings s1, s2, ..., sn. All those strings consist of uppercase and lowercase Latin letters. String w has the length of |w|, its characters are numbered from 1 to |w|.
First Petya should find all the occurrences of forbidden substrings in the w string. During the search of substrings the case of letter shouldn't be taken into consideration. That is, strings "aBC" and "ABc" are considered equal.
After that Petya should perform the replacement of all letters covered by the occurrences. More formally: a letter in the position i should be replaced by any other one if for position i in string w there exist pair of indices l, r (1 ≤ l ≤ i ≤ r ≤ |w|) such that substring w[l ... r] is contained in the collection s1, s2, ..., sn, when using case insensitive comparison. During the replacement the letter's case should remain the same. Petya is not allowed to replace the letters that aren't covered by any forbidden substring.
Letter letter (uppercase or lowercase) is considered lucky for the hockey players. That's why Petya should perform the changes so that the letter occurred in the resulting string as many times as possible. Help Petya to find such resulting string. If there are several such strings, find the one that comes first lexicographically.
Note that the process of replacements is not repeated, it occurs only once. That is, if after Petya's replacements the string started to contain new occurrences of bad substrings, Petya pays no attention to them.
Input
The first line contains the only integer n (1 ≤ n ≤ 100) — the number of forbidden substrings in the collection. Next n lines contain these substrings. The next line contains string w. All those n + 1 lines are non-empty strings consisting of uppercase and lowercase Latin letters whose length does not exceed 100. The last line contains a lowercase letter letter.
Output
Output the only line — Petya's resulting string with the maximum number of letters letter. If there are several answers then output the one that comes first lexicographically.
The lexicographical comparison is performed by the standard < operator in modern programming languages. The line a is lexicographically smaller than the line b, if a is a prefix of b, or there exists such an i (1 ≤ i ≤ |a|), that ai < bi, and for any j (1 ≤ j < i) aj = bj. |a| stands for the length of string a.
Examples
Input
3
bers
ucky
elu
PetrLoveLuckyNumbers
t
Output
PetrLovtTttttNumtttt
Input
4
hello
party
abefglghjdhfgj
IVan
petrsmatchwin
a
Output
petrsmatchwin
Input
2
aCa
cba
abAcaba
c
Output
abCacba
Tags: implementation, strings
Correct Solution:
```
import sys
f = sys.stdin
#f = open("input.txt")
n = int(f.readline())
fbs = []
for i in range(n):
fbs.append(f.readline().strip())
s = f.readline().strip()
ch = f.readline().strip()
bChange = [0] * len(s)
for i in range(n):
idx = s.lower().find(fbs[i].lower())
while idx != -1:
bChange[idx:idx+len(fbs[i])] = [1] * len(fbs[i])
idx = s.lower().find(fbs[i].lower(), idx+1)
#print(s)
#print(bChange)
result = ['']*len(s)
for i in range(len(s)):
if bChange[i] == 1:
result[i] = ch
if result[i].upper() == s[i].upper():
if result[i].upper() == 'A':
result[i] = 'B'
else:
result[i] = 'A'
if s[i].isupper():
result[i] = result[i].upper()
else:
result[i] = result[i].lower()
else:
result[i] = s[i]
print("".join(result))
```
| 46,814
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Petya loves hockey very much. One day, as he was watching a hockey match, he fell asleep. Petya dreamt of being appointed to change a hockey team's name. Thus, Petya was given the original team name w and the collection of forbidden substrings s1, s2, ..., sn. All those strings consist of uppercase and lowercase Latin letters. String w has the length of |w|, its characters are numbered from 1 to |w|.
First Petya should find all the occurrences of forbidden substrings in the w string. During the search of substrings the case of letter shouldn't be taken into consideration. That is, strings "aBC" and "ABc" are considered equal.
After that Petya should perform the replacement of all letters covered by the occurrences. More formally: a letter in the position i should be replaced by any other one if for position i in string w there exist pair of indices l, r (1 ≤ l ≤ i ≤ r ≤ |w|) such that substring w[l ... r] is contained in the collection s1, s2, ..., sn, when using case insensitive comparison. During the replacement the letter's case should remain the same. Petya is not allowed to replace the letters that aren't covered by any forbidden substring.
Letter letter (uppercase or lowercase) is considered lucky for the hockey players. That's why Petya should perform the changes so that the letter occurred in the resulting string as many times as possible. Help Petya to find such resulting string. If there are several such strings, find the one that comes first lexicographically.
Note that the process of replacements is not repeated, it occurs only once. That is, if after Petya's replacements the string started to contain new occurrences of bad substrings, Petya pays no attention to them.
Input
The first line contains the only integer n (1 ≤ n ≤ 100) — the number of forbidden substrings in the collection. Next n lines contain these substrings. The next line contains string w. All those n + 1 lines are non-empty strings consisting of uppercase and lowercase Latin letters whose length does not exceed 100. The last line contains a lowercase letter letter.
Output
Output the only line — Petya's resulting string with the maximum number of letters letter. If there are several answers then output the one that comes first lexicographically.
The lexicographical comparison is performed by the standard < operator in modern programming languages. The line a is lexicographically smaller than the line b, if a is a prefix of b, or there exists such an i (1 ≤ i ≤ |a|), that ai < bi, and for any j (1 ≤ j < i) aj = bj. |a| stands for the length of string a.
Examples
Input
3
bers
ucky
elu
PetrLoveLuckyNumbers
t
Output
PetrLovtTttttNumtttt
Input
4
hello
party
abefglghjdhfgj
IVan
petrsmatchwin
a
Output
petrsmatchwin
Input
2
aCa
cba
abAcaba
c
Output
abCacba
Tags: implementation, strings
Correct Solution:
```
n=int(input())
s=[]
for _ in range(n):
s.append(input())
w=input()
l=input()
x=[]
ans=w
for i in range(n):
ts=w
li=len(s[i])
for j in range(len(w)-li+1):
if ts[j:j+li].lower()==s[i].lower():
p=''
for e in range(j,j+li):
if w[e].islower():
if w[e]==l.lower():
if l.lower()=='a':
p=p+'b'
else:
p=p+'a'
else:
p=p+l.lower()
else:
if w[e]==l.upper():
if l.upper()=='A':
p=p+'B'
else:
p=p+'A'
else:
p=p+l.upper()
ans=ans[:j]+p+ans[j+li:]
print(ans)
```
| 46,815
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given an n × m rectangular table consisting of lower case English letters. In one operation you can completely remove one column from the table. The remaining parts are combined forming a new table. For example, after removing the second column from the table
abcd
edfg
hijk
we obtain the table:
acd
efg
hjk
A table is called good if its rows are ordered from top to bottom lexicographically, i.e. each row is lexicographically no larger than the following one. Determine the minimum number of operations of removing a column needed to make a given table good.
Input
The first line contains two integers — n and m (1 ≤ n, m ≤ 100).
Next n lines contain m small English letters each — the characters of the table.
Output
Print a single number — the minimum number of columns that you need to remove in order to make the table good.
Examples
Input
1 10
codeforces
Output
0
Input
4 4
case
care
test
code
Output
2
Input
5 4
code
forc
esco
defo
rces
Output
4
Note
In the first sample the table is already good.
In the second sample you may remove the first and third column.
In the third sample you have to remove all the columns (note that the table where all rows are empty is considered good by definition).
Let strings s and t have equal length. Then, s is lexicographically larger than t if they are not equal and the character following the largest common prefix of s and t (the prefix may be empty) in s is alphabetically larger than the corresponding character of t.
Tags: brute force, constructive algorithms, implementation
Correct Solution:
```
n,m=map(int,input().split())
ans=0
st=[input() for i in range(n)]
new=['']*n
for i in range(m):
newstr=[new[j]+st[j][i] for j in range(n)]
if(newstr==sorted(newstr)):
new=newstr
else:
ans+=1
print(ans)
```
| 47,430
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given an n × m rectangular table consisting of lower case English letters. In one operation you can completely remove one column from the table. The remaining parts are combined forming a new table. For example, after removing the second column from the table
abcd
edfg
hijk
we obtain the table:
acd
efg
hjk
A table is called good if its rows are ordered from top to bottom lexicographically, i.e. each row is lexicographically no larger than the following one. Determine the minimum number of operations of removing a column needed to make a given table good.
Input
The first line contains two integers — n and m (1 ≤ n, m ≤ 100).
Next n lines contain m small English letters each — the characters of the table.
Output
Print a single number — the minimum number of columns that you need to remove in order to make the table good.
Examples
Input
1 10
codeforces
Output
0
Input
4 4
case
care
test
code
Output
2
Input
5 4
code
forc
esco
defo
rces
Output
4
Note
In the first sample the table is already good.
In the second sample you may remove the first and third column.
In the third sample you have to remove all the columns (note that the table where all rows are empty is considered good by definition).
Let strings s and t have equal length. Then, s is lexicographically larger than t if they are not equal and the character following the largest common prefix of s and t (the prefix may be empty) in s is alphabetically larger than the corresponding character of t.
Tags: brute force, constructive algorithms, implementation
Correct Solution:
```
### NOT FINISHED
# I really need to make it go from line to line:
# first, the first 2 lines should be corrected
# then, the third, and so on.
def issorted(l):
return all(l[i] <= l[i+1] for i in range(len(l)-1))
def mainX(n,m,t):
ans = 0
while not issorted(t):
remove = -1
for i in range(len(t) - 1):
if t[i] > t[i+1]:
for j in range(len(t[i])):
if t[i][j] != t[i+1][j]:
remove = j
break
if remove != -1:
print(i,remove)
break
t = [_t[:remove] + _t[remove+1:] for _t in t]
ans += 1
print(ans)
def is_good(s):
return all(s[i] <= s[i+1] for i in range(len(s)-1))
def line_is_good(a,j):
return all(a[i][j] <= a[i+1][j] for i in range(len(a)-1))
def main5(n,m,a):
if n <= 1 or m<=0 or is_good(a):
print(0)
return
bad = []
for i in range(0,m):
if line_is_good(a,i):
continue
#if bad == []: bad.append(i)
s = ["".join([k for b,k in enumerate(x) if b not in bad]) for x in a]
print(i,bad)
if is_good(s):
print(len(bad))
return
else:
bad.append(i)
print(m)
def main6(n,m,a):
if n <= 1 or m<=0 or is_good(a):
print(0)
return
bad = []
good = range(m)
ans = 0
while not is_good(a):
remove = -1
return
for i in range(0,m):
if line_is_good(a,i):
continue
bad.append(i)
#print(i)
s = ["".join([k for b,k in enumerate(x) if b not in bad]) for x in a]
if is_good(s):
print(len(bad))
return
print(m)
def main(n,m,a):
if n <= 1 or m<=0 or is_good(a):
print(0)
return
bad = []
ans = 0
while not is_good(a):
remove = -1
for i in range(n-1):
if a[i] > a[i+1]:
for j in range(len(a[i])):
if a[i][j] > a[i+1][j]:
remove = j
break
if remove != -1:
break
a = [x[:remove] + x[remove+1:] for x in a]
ans += 1
print(ans)
def main_input():
n,m = [int(i) for i in input().split()]
a = [input() for s in range(n)]
main(n,m,a)
if __name__ == "__main__":
main_input()
```
| 47,431
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given an n × m rectangular table consisting of lower case English letters. In one operation you can completely remove one column from the table. The remaining parts are combined forming a new table. For example, after removing the second column from the table
abcd
edfg
hijk
we obtain the table:
acd
efg
hjk
A table is called good if its rows are ordered from top to bottom lexicographically, i.e. each row is lexicographically no larger than the following one. Determine the minimum number of operations of removing a column needed to make a given table good.
Input
The first line contains two integers — n and m (1 ≤ n, m ≤ 100).
Next n lines contain m small English letters each — the characters of the table.
Output
Print a single number — the minimum number of columns that you need to remove in order to make the table good.
Examples
Input
1 10
codeforces
Output
0
Input
4 4
case
care
test
code
Output
2
Input
5 4
code
forc
esco
defo
rces
Output
4
Note
In the first sample the table is already good.
In the second sample you may remove the first and third column.
In the third sample you have to remove all the columns (note that the table where all rows are empty is considered good by definition).
Let strings s and t have equal length. Then, s is lexicographically larger than t if they are not equal and the character following the largest common prefix of s and t (the prefix may be empty) in s is alphabetically larger than the corresponding character of t.
Tags: brute force, constructive algorithms, implementation
Correct Solution:
```
# from itertools import combinations
# from bisect import bisect_left
# from functools import *
# from collections import Counter
I = lambda: list(map(int, input().split()))
n, m = I()
ans = 0
columns = list(zip(*[input() for i in range(n)]))
g = [0 for _ in range(n)]
for column in columns:
if sum(g[i] or column[i] <= column[i + 1] for i in range(n - 1)) == n - 1:
for i in range(n - 1):
g[i] |= column[i] < column[i + 1]
else:
ans += 1
print(ans)
```
| 47,432
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given an n × m rectangular table consisting of lower case English letters. In one operation you can completely remove one column from the table. The remaining parts are combined forming a new table. For example, after removing the second column from the table
abcd
edfg
hijk
we obtain the table:
acd
efg
hjk
A table is called good if its rows are ordered from top to bottom lexicographically, i.e. each row is lexicographically no larger than the following one. Determine the minimum number of operations of removing a column needed to make a given table good.
Input
The first line contains two integers — n and m (1 ≤ n, m ≤ 100).
Next n lines contain m small English letters each — the characters of the table.
Output
Print a single number — the minimum number of columns that you need to remove in order to make the table good.
Examples
Input
1 10
codeforces
Output
0
Input
4 4
case
care
test
code
Output
2
Input
5 4
code
forc
esco
defo
rces
Output
4
Note
In the first sample the table is already good.
In the second sample you may remove the first and third column.
In the third sample you have to remove all the columns (note that the table where all rows are empty is considered good by definition).
Let strings s and t have equal length. Then, s is lexicographically larger than t if they are not equal and the character following the largest common prefix of s and t (the prefix may be empty) in s is alphabetically larger than the corresponding character of t.
Tags: brute force, constructive algorithms, implementation
Correct Solution:
```
def main():
n, m = map(int, input().split())
a = [input() for x in range(n)]
s = ['']*n
ans = 0
for i in range(m):
ts = [s[j] + a[j][i] for j in range(n)]
if(ts == sorted(ts)):
s = ts
else:
ans += 1
print(ans)
main()
```
| 47,433
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given an n × m rectangular table consisting of lower case English letters. In one operation you can completely remove one column from the table. The remaining parts are combined forming a new table. For example, after removing the second column from the table
abcd
edfg
hijk
we obtain the table:
acd
efg
hjk
A table is called good if its rows are ordered from top to bottom lexicographically, i.e. each row is lexicographically no larger than the following one. Determine the minimum number of operations of removing a column needed to make a given table good.
Input
The first line contains two integers — n and m (1 ≤ n, m ≤ 100).
Next n lines contain m small English letters each — the characters of the table.
Output
Print a single number — the minimum number of columns that you need to remove in order to make the table good.
Examples
Input
1 10
codeforces
Output
0
Input
4 4
case
care
test
code
Output
2
Input
5 4
code
forc
esco
defo
rces
Output
4
Note
In the first sample the table is already good.
In the second sample you may remove the first and third column.
In the third sample you have to remove all the columns (note that the table where all rows are empty is considered good by definition).
Let strings s and t have equal length. Then, s is lexicographically larger than t if they are not equal and the character following the largest common prefix of s and t (the prefix may be empty) in s is alphabetically larger than the corresponding character of t.
Tags: brute force, constructive algorithms, implementation
Correct Solution:
```
def remove(p, a):
for i in range(len(a)):
a[i] = a[i][: p] + a[i][p + 1: ]
n, m = [int(x) for x in input().split()]
a = []
for i in range(n):
a.append(input())
removed = 0
for i in range(m):
i -= removed
for j in range(n - 1):
if a[j][: i + 1] > a[j + 1][: i + 1]:
remove(i, a)
removed += 1
break
print(removed)
```
| 47,434
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given an n × m rectangular table consisting of lower case English letters. In one operation you can completely remove one column from the table. The remaining parts are combined forming a new table. For example, after removing the second column from the table
abcd
edfg
hijk
we obtain the table:
acd
efg
hjk
A table is called good if its rows are ordered from top to bottom lexicographically, i.e. each row is lexicographically no larger than the following one. Determine the minimum number of operations of removing a column needed to make a given table good.
Input
The first line contains two integers — n and m (1 ≤ n, m ≤ 100).
Next n lines contain m small English letters each — the characters of the table.
Output
Print a single number — the minimum number of columns that you need to remove in order to make the table good.
Examples
Input
1 10
codeforces
Output
0
Input
4 4
case
care
test
code
Output
2
Input
5 4
code
forc
esco
defo
rces
Output
4
Note
In the first sample the table is already good.
In the second sample you may remove the first and third column.
In the third sample you have to remove all the columns (note that the table where all rows are empty is considered good by definition).
Let strings s and t have equal length. Then, s is lexicographically larger than t if they are not equal and the character following the largest common prefix of s and t (the prefix may be empty) in s is alphabetically larger than the corresponding character of t.
Tags: brute force, constructive algorithms, implementation
Correct Solution:
```
# cook your dish here
from sys import stdin,stdout
from collections import Counter
from itertools import permutations
import bisect
import math
I=lambda: map(int,stdin.readline().split())
I1=lambda: stdin.readline()
n,m=I()
if n==1:
print(0)
exit()
s=[I1() for i in range(n)]
if m==1:
if s==sorted(s):
print(0)
else:
print(1)
exit()
c,i=0,1
while True:
if i>len(s[0]): break
for j in range(n-1):
if s[j][:i]>s[j+1][:i]:
c+=1
s=[x[:(i-1)]+x[i:] for x in s]
i-=1
break
i+=1
print(c)
```
| 47,435
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given an n × m rectangular table consisting of lower case English letters. In one operation you can completely remove one column from the table. The remaining parts are combined forming a new table. For example, after removing the second column from the table
abcd
edfg
hijk
we obtain the table:
acd
efg
hjk
A table is called good if its rows are ordered from top to bottom lexicographically, i.e. each row is lexicographically no larger than the following one. Determine the minimum number of operations of removing a column needed to make a given table good.
Input
The first line contains two integers — n and m (1 ≤ n, m ≤ 100).
Next n lines contain m small English letters each — the characters of the table.
Output
Print a single number — the minimum number of columns that you need to remove in order to make the table good.
Examples
Input
1 10
codeforces
Output
0
Input
4 4
case
care
test
code
Output
2
Input
5 4
code
forc
esco
defo
rces
Output
4
Note
In the first sample the table is already good.
In the second sample you may remove the first and third column.
In the third sample you have to remove all the columns (note that the table where all rows are empty is considered good by definition).
Let strings s and t have equal length. Then, s is lexicographically larger than t if they are not equal and the character following the largest common prefix of s and t (the prefix may be empty) in s is alphabetically larger than the corresponding character of t.
Tags: brute force, constructive algorithms, implementation
Correct Solution:
```
n, m = map(int,input().split())
table = [input() for i in range(n)]
ans = 0
ar = [1] * n
for i in range(m):
ar2 = [ar[i] for i in range(n)]
flag = 1
for j in range(1,n):
if ar[j]:
if table[j][i] > table[j - 1][i]:
ar2[j] = 0
elif table[j][i] < table[j - 1][i]:
ans += 1
flag = 0
break
if flag:
ar = [ar2[i] for i in range(n)]
print(ans)
```
| 47,436
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given an n × m rectangular table consisting of lower case English letters. In one operation you can completely remove one column from the table. The remaining parts are combined forming a new table. For example, after removing the second column from the table
abcd
edfg
hijk
we obtain the table:
acd
efg
hjk
A table is called good if its rows are ordered from top to bottom lexicographically, i.e. each row is lexicographically no larger than the following one. Determine the minimum number of operations of removing a column needed to make a given table good.
Input
The first line contains two integers — n and m (1 ≤ n, m ≤ 100).
Next n lines contain m small English letters each — the characters of the table.
Output
Print a single number — the minimum number of columns that you need to remove in order to make the table good.
Examples
Input
1 10
codeforces
Output
0
Input
4 4
case
care
test
code
Output
2
Input
5 4
code
forc
esco
defo
rces
Output
4
Note
In the first sample the table is already good.
In the second sample you may remove the first and third column.
In the third sample you have to remove all the columns (note that the table where all rows are empty is considered good by definition).
Let strings s and t have equal length. Then, s is lexicographically larger than t if they are not equal and the character following the largest common prefix of s and t (the prefix may be empty) in s is alphabetically larger than the corresponding character of t.
Tags: brute force, constructive algorithms, implementation
Correct Solution:
```
from operator import itemgetter
n, m = map(int, input().strip().split())
table = []
bad_cols = [False] * m
for _ in range(n):
table.append(input().strip())
for j in range(m):
indices = [idx for idx in range(j + 1) if not bad_cols[idx]]
for i in range(1, n):
if itemgetter(*indices)(table[i]) < itemgetter(*indices)(table[i - 1]):
bad_cols[j] = True
break
print(sum(bad_cols))
```
| 47,437
|
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|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given an n × m rectangular table consisting of lower case English letters. In one operation you can completely remove one column from the table. The remaining parts are combined forming a new table. For example, after removing the second column from the table
abcd
edfg
hijk
we obtain the table:
acd
efg
hjk
A table is called good if its rows are ordered from top to bottom lexicographically, i.e. each row is lexicographically no larger than the following one. Determine the minimum number of operations of removing a column needed to make a given table good.
Input
The first line contains two integers — n and m (1 ≤ n, m ≤ 100).
Next n lines contain m small English letters each — the characters of the table.
Output
Print a single number — the minimum number of columns that you need to remove in order to make the table good.
Examples
Input
1 10
codeforces
Output
0
Input
4 4
case
care
test
code
Output
2
Input
5 4
code
forc
esco
defo
rces
Output
4
Note
In the first sample the table is already good.
In the second sample you may remove the first and third column.
In the third sample you have to remove all the columns (note that the table where all rows are empty is considered good by definition).
Let strings s and t have equal length. Then, s is lexicographically larger than t if they are not equal and the character following the largest common prefix of s and t (the prefix may be empty) in s is alphabetically larger than the corresponding character of t.
Submitted Solution:
```
n,m=map(int, input().split(' ') )
good = [[] for i in range(n)]
masstr = [list(str(input())) for i in range(n)]
for nomer_stolb in range(m):
tmp = [stroka + [masstr[i][nomer_stolb]] for i, stroka in enumerate(good)]
if sorted(tmp)==tmp:
good = tmp
print (m-len(good[0]))
```
Yes
| 47,438
|
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|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given an n × m rectangular table consisting of lower case English letters. In one operation you can completely remove one column from the table. The remaining parts are combined forming a new table. For example, after removing the second column from the table
abcd
edfg
hijk
we obtain the table:
acd
efg
hjk
A table is called good if its rows are ordered from top to bottom lexicographically, i.e. each row is lexicographically no larger than the following one. Determine the minimum number of operations of removing a column needed to make a given table good.
Input
The first line contains two integers — n and m (1 ≤ n, m ≤ 100).
Next n lines contain m small English letters each — the characters of the table.
Output
Print a single number — the minimum number of columns that you need to remove in order to make the table good.
Examples
Input
1 10
codeforces
Output
0
Input
4 4
case
care
test
code
Output
2
Input
5 4
code
forc
esco
defo
rces
Output
4
Note
In the first sample the table is already good.
In the second sample you may remove the first and third column.
In the third sample you have to remove all the columns (note that the table where all rows are empty is considered good by definition).
Let strings s and t have equal length. Then, s is lexicographically larger than t if they are not equal and the character following the largest common prefix of s and t (the prefix may be empty) in s is alphabetically larger than the corresponding character of t.
Submitted Solution:
```
def remove(p, a):
for i in range(len(a)):
a[i] = a[i][: p] + a[i][p + 1: ]
n, m = [int(x) for x in input().split()]
a = []
for i in range(n):
a.append(input())
removed = 0
for i in range(m):
i -= removed
for j in range(n - 1):
if a[j][: i + 1] > a[j + 1][: i + 1]:
remove(i, a)
removed += 1
break
print(removed)
# Made By Mostafa_Khaled
```
Yes
| 47,439
|
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|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given an n × m rectangular table consisting of lower case English letters. In one operation you can completely remove one column from the table. The remaining parts are combined forming a new table. For example, after removing the second column from the table
abcd
edfg
hijk
we obtain the table:
acd
efg
hjk
A table is called good if its rows are ordered from top to bottom lexicographically, i.e. each row is lexicographically no larger than the following one. Determine the minimum number of operations of removing a column needed to make a given table good.
Input
The first line contains two integers — n and m (1 ≤ n, m ≤ 100).
Next n lines contain m small English letters each — the characters of the table.
Output
Print a single number — the minimum number of columns that you need to remove in order to make the table good.
Examples
Input
1 10
codeforces
Output
0
Input
4 4
case
care
test
code
Output
2
Input
5 4
code
forc
esco
defo
rces
Output
4
Note
In the first sample the table is already good.
In the second sample you may remove the first and third column.
In the third sample you have to remove all the columns (note that the table where all rows are empty is considered good by definition).
Let strings s and t have equal length. Then, s is lexicographically larger than t if they are not equal and the character following the largest common prefix of s and t (the prefix may be empty) in s is alphabetically larger than the corresponding character of t.
Submitted Solution:
```
def input_split(f): return map(f, input().split())
def main():
n, m = input_split(int)
lst = [input()]
sml = []
for i in range(n - 1):
lst.append(input())
sml.append(False)
ans = 0
for i in range(m):
flag = True
for j in range(n - 1):
flag = flag and ((lst[j][i] <= lst[j + 1][i]) or sml[j])
if flag:
for j in range(n - 1):
if lst[j][i] < lst[j + 1][i]:
sml[j] = True
else:
ans += 1
print(ans)
if __name__ == "__main__":
main()
```
Yes
| 47,440
|
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|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given an n × m rectangular table consisting of lower case English letters. In one operation you can completely remove one column from the table. The remaining parts are combined forming a new table. For example, after removing the second column from the table
abcd
edfg
hijk
we obtain the table:
acd
efg
hjk
A table is called good if its rows are ordered from top to bottom lexicographically, i.e. each row is lexicographically no larger than the following one. Determine the minimum number of operations of removing a column needed to make a given table good.
Input
The first line contains two integers — n and m (1 ≤ n, m ≤ 100).
Next n lines contain m small English letters each — the characters of the table.
Output
Print a single number — the minimum number of columns that you need to remove in order to make the table good.
Examples
Input
1 10
codeforces
Output
0
Input
4 4
case
care
test
code
Output
2
Input
5 4
code
forc
esco
defo
rces
Output
4
Note
In the first sample the table is already good.
In the second sample you may remove the first and third column.
In the third sample you have to remove all the columns (note that the table where all rows are empty is considered good by definition).
Let strings s and t have equal length. Then, s is lexicographically larger than t if they are not equal and the character following the largest common prefix of s and t (the prefix may be empty) in s is alphabetically larger than the corresponding character of t.
Submitted Solution:
```
n,m = map(int, input().split())
words = []
for i in range(n):
words.append(input())
nums = [0] * n
count = 0
for j in range(m):
good = True
for i in range(n - 1):
if (nums[i+1], words[i+1][j]) < (nums[i], words[i][j]):
good = False
if good:
for i in range(n):
nums[i] *= 30
nums[i] += ord(words[i][j]) - ord('a')
else:
count += 1
print(count)
```
Yes
| 47,441
|
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] | 6
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given an n × m rectangular table consisting of lower case English letters. In one operation you can completely remove one column from the table. The remaining parts are combined forming a new table. For example, after removing the second column from the table
abcd
edfg
hijk
we obtain the table:
acd
efg
hjk
A table is called good if its rows are ordered from top to bottom lexicographically, i.e. each row is lexicographically no larger than the following one. Determine the minimum number of operations of removing a column needed to make a given table good.
Input
The first line contains two integers — n and m (1 ≤ n, m ≤ 100).
Next n lines contain m small English letters each — the characters of the table.
Output
Print a single number — the minimum number of columns that you need to remove in order to make the table good.
Examples
Input
1 10
codeforces
Output
0
Input
4 4
case
care
test
code
Output
2
Input
5 4
code
forc
esco
defo
rces
Output
4
Note
In the first sample the table is already good.
In the second sample you may remove the first and third column.
In the third sample you have to remove all the columns (note that the table where all rows are empty is considered good by definition).
Let strings s and t have equal length. Then, s is lexicographically larger than t if they are not equal and the character following the largest common prefix of s and t (the prefix may be empty) in s is alphabetically larger than the corresponding character of t.
Submitted Solution:
```
'''input
10 10
ddorannorz
mdrnzqvqgo
gdtdjmlsuf
eoxbrntqdp
hribwlslgo
ewlqrontvk
nxibmnawnh
vxiwdjvdom
hyhhewmzmp
iysgvzayst
'''
from sys import stdin
from collections import deque
def get_segment(gstart, arr):
pair = []
start = gstart
end = gstart
for i in range(1, len(arr)):
if arr[i] == arr[i - 1]:
end = i
else:
pair.append([start, end])
start = i
end = i
pair.append([start, end])
return pair
def check_arr(arr):
flag = 0
for i in range(1, len(arr)):
if arr[i] > arr[i - 1]:
pass
elif arr[i] == arr[i - 1]:
flag = 1
else:
return 3
if flag == 0:
return 1
else:
return 2
def power_of_recursion(segment, index):
# print(segment, index)
global myset
if index == m:
return
for start, end in segment:
temp = []
for i in range(start, end + 1):
temp.append(matrix[i][index])
# print(index, start, end, temp)
# print(myset)
t = check_arr(temp)
if t == 1:
continue
elif t == 2:
t_segment = get_segment(start, temp)
# print("temp", t_segment, temp)
power_of_recursion(t_segment, index + 1)
else:
myset.add(index)
# print("SET", index, start, end, temp)
power_of_recursion([[start, end]], index + 1)
# main starts
n, m = list(map(int, stdin.readline().split()))
matrix = []
for _ in range(n):
matrix.append(stdin.readline().strip())
segment = [[0, n - 1]]
myset = set()
power_of_recursion(segment, 0)
print(len(myset))
```
No
| 47,442
|
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|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given an n × m rectangular table consisting of lower case English letters. In one operation you can completely remove one column from the table. The remaining parts are combined forming a new table. For example, after removing the second column from the table
abcd
edfg
hijk
we obtain the table:
acd
efg
hjk
A table is called good if its rows are ordered from top to bottom lexicographically, i.e. each row is lexicographically no larger than the following one. Determine the minimum number of operations of removing a column needed to make a given table good.
Input
The first line contains two integers — n and m (1 ≤ n, m ≤ 100).
Next n lines contain m small English letters each — the characters of the table.
Output
Print a single number — the minimum number of columns that you need to remove in order to make the table good.
Examples
Input
1 10
codeforces
Output
0
Input
4 4
case
care
test
code
Output
2
Input
5 4
code
forc
esco
defo
rces
Output
4
Note
In the first sample the table is already good.
In the second sample you may remove the first and third column.
In the third sample you have to remove all the columns (note that the table where all rows are empty is considered good by definition).
Let strings s and t have equal length. Then, s is lexicographically larger than t if they are not equal and the character following the largest common prefix of s and t (the prefix may be empty) in s is alphabetically larger than the corresponding character of t.
Submitted Solution:
```
n_lines, n_cols = map(int, input().split())
cols = []
for _ in range(n_lines):
cols.append(input())
def is_sorted(l):
l = iter(l)
prev = next(l, None)
if prev is None:
return True
while True:
cur = next(l, None)
if cur is None:
break
elif cur < prev:
return False
prev = cur
return True
def pivot_cols(cols):
if len(cols) < 2:
return None
s = []
for i in range(len(cols[0])):
col = cols[i]
if col in pivot_cols.memo:
ok = pivot_cols.memo[col]
else:
ok = is_sorted(map(lambda c: c[i], cols))
pivot_cols.memo[col] = ok
if not ok:
s.append(i)
return s
pivot_cols.memo = dict()
def do_rec(cols):
pivots = pivot_cols(cols)
if not pivots or pivots[0] != 0:
return 0
min_steps = 100
for i in pivots:
n_cols = [s[0:i] + s[i+1:] for s in cols]
steps = do_rec(n_cols)
min_steps = min(steps, min_steps)
return 1 + min_steps
print(do_rec(cols))
```
No
| 47,443
|
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] | 6
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given an n × m rectangular table consisting of lower case English letters. In one operation you can completely remove one column from the table. The remaining parts are combined forming a new table. For example, after removing the second column from the table
abcd
edfg
hijk
we obtain the table:
acd
efg
hjk
A table is called good if its rows are ordered from top to bottom lexicographically, i.e. each row is lexicographically no larger than the following one. Determine the minimum number of operations of removing a column needed to make a given table good.
Input
The first line contains two integers — n and m (1 ≤ n, m ≤ 100).
Next n lines contain m small English letters each — the characters of the table.
Output
Print a single number — the minimum number of columns that you need to remove in order to make the table good.
Examples
Input
1 10
codeforces
Output
0
Input
4 4
case
care
test
code
Output
2
Input
5 4
code
forc
esco
defo
rces
Output
4
Note
In the first sample the table is already good.
In the second sample you may remove the first and third column.
In the third sample you have to remove all the columns (note that the table where all rows are empty is considered good by definition).
Let strings s and t have equal length. Then, s is lexicographically larger than t if they are not equal and the character following the largest common prefix of s and t (the prefix may be empty) in s is alphabetically larger than the corresponding character of t.
Submitted Solution:
```
from sys import *
inp = lambda : stdin.readline()
def main():
r,c = map(int,inp().split())
l,ans = [inp()[:-1] for i in range(r)],0
chec = [0 for i in range(c)]
for j in range(c):
for i in range(1,r):
if l[i][j] < l[i-1][j]:
chec[j] = 1
break
de = []
for st in range(c):
if chec[st]:
ans += 1
de.append(st)
else:
break
p = []
for i in range(1,r):
if l[i][st] == l[i-1][st]:
p.append(i-1)
#print(p)
for i in p:
ls = st
for j in (j for j in range(st+1,c) if j not in de):
if l[i][j] < l[i+1][j]: break
elif l[i][j] > l[i-1][j]:
de.append(j)
ans += 1
#print(j)
print(ans)
if __name__ == "__main__":
main()
```
No
| 47,444
|
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|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given an n × m rectangular table consisting of lower case English letters. In one operation you can completely remove one column from the table. The remaining parts are combined forming a new table. For example, after removing the second column from the table
abcd
edfg
hijk
we obtain the table:
acd
efg
hjk
A table is called good if its rows are ordered from top to bottom lexicographically, i.e. each row is lexicographically no larger than the following one. Determine the minimum number of operations of removing a column needed to make a given table good.
Input
The first line contains two integers — n and m (1 ≤ n, m ≤ 100).
Next n lines contain m small English letters each — the characters of the table.
Output
Print a single number — the minimum number of columns that you need to remove in order to make the table good.
Examples
Input
1 10
codeforces
Output
0
Input
4 4
case
care
test
code
Output
2
Input
5 4
code
forc
esco
defo
rces
Output
4
Note
In the first sample the table is already good.
In the second sample you may remove the first and third column.
In the third sample you have to remove all the columns (note that the table where all rows are empty is considered good by definition).
Let strings s and t have equal length. Then, s is lexicographically larger than t if they are not equal and the character following the largest common prefix of s and t (the prefix may be empty) in s is alphabetically larger than the corresponding character of t.
Submitted Solution:
```
#Er2
def main():
n, m = map(int, input().split())
if n == 1:
s = input()
print(0)
return
a = []
for i in range(n):
s = list(input())
a.append(s)
answer = 0
for i in range(m):
is_sorted = True
for j in range(n - 1):
if ord(a[j][i]) > ord(a[j + 1][i]):
is_sorted = False
break
if not is_sorted:
answer += 1
for p in range(n):
a[p][i] = ''
all_sort = True
for t in range(n - 1):
if a[t] > a[t + 1]:
all_sort = False
break
if all_sort:
break
print(answer)
return
if __name__=="__main__":
main()
```
No
| 47,445
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Little Nastya has a hobby, she likes to remove some letters from word, to obtain another word. But it turns out to be pretty hard for her, because she is too young. Therefore, her brother Sergey always helps her.
Sergey gives Nastya the word t and wants to get the word p out of it. Nastya removes letters in a certain order (one after another, in this order strictly), which is specified by permutation of letters' indices of the word t: a1... a|t|. We denote the length of word x as |x|. Note that after removing one letter, the indices of other letters don't change. For example, if t = "nastya" and a = [4, 1, 5, 3, 2, 6] then removals make the following sequence of words "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya".
Sergey knows this permutation. His goal is to stop his sister at some point and continue removing by himself to get the word p. Since Nastya likes this activity, Sergey wants to stop her as late as possible. Your task is to determine, how many letters Nastya can remove before she will be stopped by Sergey.
It is guaranteed that the word p can be obtained by removing the letters from word t.
Input
The first and second lines of the input contain the words t and p, respectively. Words are composed of lowercase letters of the Latin alphabet (1 ≤ |p| < |t| ≤ 200 000). It is guaranteed that the word p can be obtained by removing the letters from word t.
Next line contains a permutation a1, a2, ..., a|t| of letter indices that specifies the order in which Nastya removes letters of t (1 ≤ ai ≤ |t|, all ai are distinct).
Output
Print a single integer number, the maximum number of letters that Nastya can remove.
Examples
Input
ababcba
abb
5 3 4 1 7 6 2
Output
3
Input
bbbabb
bb
1 6 3 4 2 5
Output
4
Note
In the first sample test sequence of removing made by Nastya looks like this:
"ababcba" <image> "ababcba" <image> "ababcba" <image> "ababcba"
Nastya can not continue, because it is impossible to get word "abb" from word "ababcba".
So, Nastya will remove only three letters.
Tags: binary search, greedy, strings
Correct Solution:
```
s = (input())
p = (input())
a = [i-1 for i in list(map(int,input().split()))]
left = 0
right = len(s)
while right - left > 1:
d = list(s)
mid = int((left + right)/2)
for i in range(mid):
d[a[i]] = ''
j = 0
for i in range(len(s)):
if p[j] == d[i]:
j += 1
if j == len(p):
left = mid
break
if j != len(p):
right = mid
print (left)
```
| 47,577
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Little Nastya has a hobby, she likes to remove some letters from word, to obtain another word. But it turns out to be pretty hard for her, because she is too young. Therefore, her brother Sergey always helps her.
Sergey gives Nastya the word t and wants to get the word p out of it. Nastya removes letters in a certain order (one after another, in this order strictly), which is specified by permutation of letters' indices of the word t: a1... a|t|. We denote the length of word x as |x|. Note that after removing one letter, the indices of other letters don't change. For example, if t = "nastya" and a = [4, 1, 5, 3, 2, 6] then removals make the following sequence of words "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya".
Sergey knows this permutation. His goal is to stop his sister at some point and continue removing by himself to get the word p. Since Nastya likes this activity, Sergey wants to stop her as late as possible. Your task is to determine, how many letters Nastya can remove before she will be stopped by Sergey.
It is guaranteed that the word p can be obtained by removing the letters from word t.
Input
The first and second lines of the input contain the words t and p, respectively. Words are composed of lowercase letters of the Latin alphabet (1 ≤ |p| < |t| ≤ 200 000). It is guaranteed that the word p can be obtained by removing the letters from word t.
Next line contains a permutation a1, a2, ..., a|t| of letter indices that specifies the order in which Nastya removes letters of t (1 ≤ ai ≤ |t|, all ai are distinct).
Output
Print a single integer number, the maximum number of letters that Nastya can remove.
Examples
Input
ababcba
abb
5 3 4 1 7 6 2
Output
3
Input
bbbabb
bb
1 6 3 4 2 5
Output
4
Note
In the first sample test sequence of removing made by Nastya looks like this:
"ababcba" <image> "ababcba" <image> "ababcba" <image> "ababcba"
Nastya can not continue, because it is impossible to get word "abb" from word "ababcba".
So, Nastya will remove only three letters.
Tags: binary search, greedy, strings
Correct Solution:
```
def good(t, p, b, k):
j = 0
for i in range(len(t)):
if b[i] >= k and t[i] == p[j]:
j += 1
if j == len(p):
return True
return False
def solve(t, p, a):
b = [0] * len(a)
for i in range(len(a)):
b[a[i] - 1] = i
low = 0
high = len(a)
while low + 1 < high:
mid = (low + high) // 2
if good(t, p, b, mid):
low = mid
else:
high = mid
return low
t = input()
p = input()
a = list(map(int, input().split()))
print(solve(t, p, a))
```
| 47,578
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Little Nastya has a hobby, she likes to remove some letters from word, to obtain another word. But it turns out to be pretty hard for her, because she is too young. Therefore, her brother Sergey always helps her.
Sergey gives Nastya the word t and wants to get the word p out of it. Nastya removes letters in a certain order (one after another, in this order strictly), which is specified by permutation of letters' indices of the word t: a1... a|t|. We denote the length of word x as |x|. Note that after removing one letter, the indices of other letters don't change. For example, if t = "nastya" and a = [4, 1, 5, 3, 2, 6] then removals make the following sequence of words "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya".
Sergey knows this permutation. His goal is to stop his sister at some point and continue removing by himself to get the word p. Since Nastya likes this activity, Sergey wants to stop her as late as possible. Your task is to determine, how many letters Nastya can remove before she will be stopped by Sergey.
It is guaranteed that the word p can be obtained by removing the letters from word t.
Input
The first and second lines of the input contain the words t and p, respectively. Words are composed of lowercase letters of the Latin alphabet (1 ≤ |p| < |t| ≤ 200 000). It is guaranteed that the word p can be obtained by removing the letters from word t.
Next line contains a permutation a1, a2, ..., a|t| of letter indices that specifies the order in which Nastya removes letters of t (1 ≤ ai ≤ |t|, all ai are distinct).
Output
Print a single integer number, the maximum number of letters that Nastya can remove.
Examples
Input
ababcba
abb
5 3 4 1 7 6 2
Output
3
Input
bbbabb
bb
1 6 3 4 2 5
Output
4
Note
In the first sample test sequence of removing made by Nastya looks like this:
"ababcba" <image> "ababcba" <image> "ababcba" <image> "ababcba"
Nastya can not continue, because it is impossible to get word "abb" from word "ababcba".
So, Nastya will remove only three letters.
Tags: binary search, greedy, strings
Correct Solution:
```
def possible(t,p,a,n):
s = ''
check = [True]*len(t)
for i in range(n):
check[a[i]] = False
for i in range(len(check)):
if check[i]:
s += t[i]
m = len(s)
lp = len(p)
c = 0
for i in range(m):
if s[i] == p[c]:
c += 1
if c == lp:
return True
return False
t = input()
p = input()
a = list(map(int,input().split()))
for i in range(len(a)):
a[i] -= 1
low = 0
high = len(a)
ans = 0
while low <= high:
mid = (low+high)//2
if possible(t,p,a,mid):
ans = mid
low = mid+1
else:
high = mid-1
print(ans)
```
| 47,579
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Little Nastya has a hobby, she likes to remove some letters from word, to obtain another word. But it turns out to be pretty hard for her, because she is too young. Therefore, her brother Sergey always helps her.
Sergey gives Nastya the word t and wants to get the word p out of it. Nastya removes letters in a certain order (one after another, in this order strictly), which is specified by permutation of letters' indices of the word t: a1... a|t|. We denote the length of word x as |x|. Note that after removing one letter, the indices of other letters don't change. For example, if t = "nastya" and a = [4, 1, 5, 3, 2, 6] then removals make the following sequence of words "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya".
Sergey knows this permutation. His goal is to stop his sister at some point and continue removing by himself to get the word p. Since Nastya likes this activity, Sergey wants to stop her as late as possible. Your task is to determine, how many letters Nastya can remove before she will be stopped by Sergey.
It is guaranteed that the word p can be obtained by removing the letters from word t.
Input
The first and second lines of the input contain the words t and p, respectively. Words are composed of lowercase letters of the Latin alphabet (1 ≤ |p| < |t| ≤ 200 000). It is guaranteed that the word p can be obtained by removing the letters from word t.
Next line contains a permutation a1, a2, ..., a|t| of letter indices that specifies the order in which Nastya removes letters of t (1 ≤ ai ≤ |t|, all ai are distinct).
Output
Print a single integer number, the maximum number of letters that Nastya can remove.
Examples
Input
ababcba
abb
5 3 4 1 7 6 2
Output
3
Input
bbbabb
bb
1 6 3 4 2 5
Output
4
Note
In the first sample test sequence of removing made by Nastya looks like this:
"ababcba" <image> "ababcba" <image> "ababcba" <image> "ababcba"
Nastya can not continue, because it is impossible to get word "abb" from word "ababcba".
So, Nastya will remove only three letters.
Tags: binary search, greedy, strings
Correct Solution:
```
s = input()
t = input()
a = list(map(int, input().split()))
def ok(n):
bad = set()
for i in range(n):
bad.add(a[i] - 1)
pt = 0
ps = 0
while pt < len(t) and ps < len(s):
if ps in bad:
ps += 1
else:
if t[pt] == s[ps]:
ps += 1
pt += 1
else:
ps += 1
return pt == len(t)
low = 0
high = len(s)
while high >= low:
mid = (high + low) // 2
if (ok(mid)):
poss = mid
low = mid + 1
else:
high = mid - 1
print (poss)
```
| 47,580
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Little Nastya has a hobby, she likes to remove some letters from word, to obtain another word. But it turns out to be pretty hard for her, because she is too young. Therefore, her brother Sergey always helps her.
Sergey gives Nastya the word t and wants to get the word p out of it. Nastya removes letters in a certain order (one after another, in this order strictly), which is specified by permutation of letters' indices of the word t: a1... a|t|. We denote the length of word x as |x|. Note that after removing one letter, the indices of other letters don't change. For example, if t = "nastya" and a = [4, 1, 5, 3, 2, 6] then removals make the following sequence of words "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya".
Sergey knows this permutation. His goal is to stop his sister at some point and continue removing by himself to get the word p. Since Nastya likes this activity, Sergey wants to stop her as late as possible. Your task is to determine, how many letters Nastya can remove before she will be stopped by Sergey.
It is guaranteed that the word p can be obtained by removing the letters from word t.
Input
The first and second lines of the input contain the words t and p, respectively. Words are composed of lowercase letters of the Latin alphabet (1 ≤ |p| < |t| ≤ 200 000). It is guaranteed that the word p can be obtained by removing the letters from word t.
Next line contains a permutation a1, a2, ..., a|t| of letter indices that specifies the order in which Nastya removes letters of t (1 ≤ ai ≤ |t|, all ai are distinct).
Output
Print a single integer number, the maximum number of letters that Nastya can remove.
Examples
Input
ababcba
abb
5 3 4 1 7 6 2
Output
3
Input
bbbabb
bb
1 6 3 4 2 5
Output
4
Note
In the first sample test sequence of removing made by Nastya looks like this:
"ababcba" <image> "ababcba" <image> "ababcba" <image> "ababcba"
Nastya can not continue, because it is impossible to get word "abb" from word "ababcba".
So, Nastya will remove only three letters.
Tags: binary search, greedy, strings
Correct Solution:
```
s = input()
t = input()
a = [int(x) - 1 for x in input().split()]
def ok(n):
bad = set(a[:n])
it = (a for i, a in enumerate(s) if i not in bad)
return all(c in it for c in t)
low = 0
high = len(s)
while low < high:
mid = (high + low + 1) // 2
if (ok(mid)):
low = mid
else:
high = mid - 1
print (high)
```
| 47,581
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Little Nastya has a hobby, she likes to remove some letters from word, to obtain another word. But it turns out to be pretty hard for her, because she is too young. Therefore, her brother Sergey always helps her.
Sergey gives Nastya the word t and wants to get the word p out of it. Nastya removes letters in a certain order (one after another, in this order strictly), which is specified by permutation of letters' indices of the word t: a1... a|t|. We denote the length of word x as |x|. Note that after removing one letter, the indices of other letters don't change. For example, if t = "nastya" and a = [4, 1, 5, 3, 2, 6] then removals make the following sequence of words "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya".
Sergey knows this permutation. His goal is to stop his sister at some point and continue removing by himself to get the word p. Since Nastya likes this activity, Sergey wants to stop her as late as possible. Your task is to determine, how many letters Nastya can remove before she will be stopped by Sergey.
It is guaranteed that the word p can be obtained by removing the letters from word t.
Input
The first and second lines of the input contain the words t and p, respectively. Words are composed of lowercase letters of the Latin alphabet (1 ≤ |p| < |t| ≤ 200 000). It is guaranteed that the word p can be obtained by removing the letters from word t.
Next line contains a permutation a1, a2, ..., a|t| of letter indices that specifies the order in which Nastya removes letters of t (1 ≤ ai ≤ |t|, all ai are distinct).
Output
Print a single integer number, the maximum number of letters that Nastya can remove.
Examples
Input
ababcba
abb
5 3 4 1 7 6 2
Output
3
Input
bbbabb
bb
1 6 3 4 2 5
Output
4
Note
In the first sample test sequence of removing made by Nastya looks like this:
"ababcba" <image> "ababcba" <image> "ababcba" <image> "ababcba"
Nastya can not continue, because it is impossible to get word "abb" from word "ababcba".
So, Nastya will remove only three letters.
Tags: binary search, greedy, strings
Correct Solution:
```
b = input()
s = input()
i = [int(x)-1 for x in input().split()]
def viable(x):
ind = 0
ok = [0]*len(b)
for j in range(0,x):
ok[i[j]] = 1
for j in range(0,len(b)):
if s[ind] == b[j] and ok[j] != 1:
ind += 1
if ind == len(s):
break
if ind == len(s):
return True
else:
return False
low = 0
high = len(b)
while low < high:
mid = (low+high)//2
if viable(mid):
ans = mid
low = mid+1
else:
high = mid
print(ans)
```
| 47,582
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Little Nastya has a hobby, she likes to remove some letters from word, to obtain another word. But it turns out to be pretty hard for her, because she is too young. Therefore, her brother Sergey always helps her.
Sergey gives Nastya the word t and wants to get the word p out of it. Nastya removes letters in a certain order (one after another, in this order strictly), which is specified by permutation of letters' indices of the word t: a1... a|t|. We denote the length of word x as |x|. Note that after removing one letter, the indices of other letters don't change. For example, if t = "nastya" and a = [4, 1, 5, 3, 2, 6] then removals make the following sequence of words "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya".
Sergey knows this permutation. His goal is to stop his sister at some point and continue removing by himself to get the word p. Since Nastya likes this activity, Sergey wants to stop her as late as possible. Your task is to determine, how many letters Nastya can remove before she will be stopped by Sergey.
It is guaranteed that the word p can be obtained by removing the letters from word t.
Input
The first and second lines of the input contain the words t and p, respectively. Words are composed of lowercase letters of the Latin alphabet (1 ≤ |p| < |t| ≤ 200 000). It is guaranteed that the word p can be obtained by removing the letters from word t.
Next line contains a permutation a1, a2, ..., a|t| of letter indices that specifies the order in which Nastya removes letters of t (1 ≤ ai ≤ |t|, all ai are distinct).
Output
Print a single integer number, the maximum number of letters that Nastya can remove.
Examples
Input
ababcba
abb
5 3 4 1 7 6 2
Output
3
Input
bbbabb
bb
1 6 3 4 2 5
Output
4
Note
In the first sample test sequence of removing made by Nastya looks like this:
"ababcba" <image> "ababcba" <image> "ababcba" <image> "ababcba"
Nastya can not continue, because it is impossible to get word "abb" from word "ababcba".
So, Nastya will remove only three letters.
Tags: binary search, greedy, strings
Correct Solution:
```
#########################################################################################################\
#########################################################################################################
###################################The_Apurv_Rathore#####################################################
#########################################################################################################
#########################################################################################################
import sys,os,io
from math import log, gcd, ceil
from collections import defaultdict as dd, deque, Counter
from heapq import heappush, heappop
from sys import stdin
from bisect import bisect_left, bisect_right
import math
def ncr(n, r, p): #using fermat's little theorem
num = den = 1
for i in range(r):
num = (num * (n - i)) % p
den = (den * (i + 1)) % p
return (num * pow(den,
p - 2, p)) % p
def primeFactors(n):
l = []
while n % 2 == 0:
l.append(2)
n = n / 2
for i in range(3,int(math.sqrt(n))+1,2):
while n % i== 0:
l.append(int(i))
n = n / i
if n > 2:
l.append(n)
return list(set(l))
def power(x, y, p) :
res = 1
x = x % p
if (x == 0) :
return 0
while (y > 0) :
if ((y & 1) == 1) :
res = (res * x) % p
y = y >> 1 # y = y/2
x = (x * x) % p
return res
def si():
return input()
# input = io.BytesIO(os.read(0, os.fstat(0).st_size)).readline
def prefix_sum(arr):
r = [0] * (len(arr)+1)
for i, el in enumerate(arr):
r[i+1] = r[i] + el
return r
def divideCeil(n,x):
if (n%x==0):
return n//x
return n//x+1
def ii():
return int(input())
def li():
return list(map(int,input().split()))
def ws(s): sys.stdout.write(s + '\n')
def wi(n): sys.stdout.write(str(n) + '\n')
def wia(a): sys.stdout.write(' '.join([str(x) for x in a]) + '\n')
if(os.path.exists('input.txt')):
sys.stdin = open("input.txt","r")
sys.stdout = open("output.txt","w")
# input = io.BytesIO(os.read(0, os.fstat(0).st_size)).readline
mod = 998244353
t = 1
# t = ii()
def check(moves):
l = list(s)
for i in range(moves):
l[p[i]-1] = '.'
ptrt = 0
ptrl = 0
while(ptrt<len(t) and ptrl<len(l)):
if (l[ptrl]==t[ptrt]):
ptrl+=1
ptrt+=1
else:
ptrl+=1
# print("ptrt,ptrl",ptrt,ptrl)
if (ptrt==len(t)):
return 1
return 0
for _ in range(t):
s = si()
t = si()
p = li()
n = len(s)
low = 0
high = n
ans = 0
while(low<=high):
mid = (high+low)//2
# print("check(mid)",check(mid))
if (check(mid)):
ans = mid
low = mid+1
else:
high = mid-1
print(ans)
```
| 47,583
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Little Nastya has a hobby, she likes to remove some letters from word, to obtain another word. But it turns out to be pretty hard for her, because she is too young. Therefore, her brother Sergey always helps her.
Sergey gives Nastya the word t and wants to get the word p out of it. Nastya removes letters in a certain order (one after another, in this order strictly), which is specified by permutation of letters' indices of the word t: a1... a|t|. We denote the length of word x as |x|. Note that after removing one letter, the indices of other letters don't change. For example, if t = "nastya" and a = [4, 1, 5, 3, 2, 6] then removals make the following sequence of words "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya".
Sergey knows this permutation. His goal is to stop his sister at some point and continue removing by himself to get the word p. Since Nastya likes this activity, Sergey wants to stop her as late as possible. Your task is to determine, how many letters Nastya can remove before she will be stopped by Sergey.
It is guaranteed that the word p can be obtained by removing the letters from word t.
Input
The first and second lines of the input contain the words t and p, respectively. Words are composed of lowercase letters of the Latin alphabet (1 ≤ |p| < |t| ≤ 200 000). It is guaranteed that the word p can be obtained by removing the letters from word t.
Next line contains a permutation a1, a2, ..., a|t| of letter indices that specifies the order in which Nastya removes letters of t (1 ≤ ai ≤ |t|, all ai are distinct).
Output
Print a single integer number, the maximum number of letters that Nastya can remove.
Examples
Input
ababcba
abb
5 3 4 1 7 6 2
Output
3
Input
bbbabb
bb
1 6 3 4 2 5
Output
4
Note
In the first sample test sequence of removing made by Nastya looks like this:
"ababcba" <image> "ababcba" <image> "ababcba" <image> "ababcba"
Nastya can not continue, because it is impossible to get word "abb" from word "ababcba".
So, Nastya will remove only three letters.
Tags: binary search, greedy, strings
Correct Solution:
```
s = input()
t = input()
a = [int(x) - 1 for x in input().split()]
def ok(n):
bad = set(a[:n])
it = (a for i, a in enumerate(s) if i not in bad)
return all(c in it for c in t)
low = 0
high = len(s)
while low <= high:
mid = (high + low) // 2
if (ok(mid)):
low = mid + 1
poss = mid
else:
high = mid - 1
print (poss)
```
| 47,584
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] | 6
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Little Nastya has a hobby, she likes to remove some letters from word, to obtain another word. But it turns out to be pretty hard for her, because she is too young. Therefore, her brother Sergey always helps her.
Sergey gives Nastya the word t and wants to get the word p out of it. Nastya removes letters in a certain order (one after another, in this order strictly), which is specified by permutation of letters' indices of the word t: a1... a|t|. We denote the length of word x as |x|. Note that after removing one letter, the indices of other letters don't change. For example, if t = "nastya" and a = [4, 1, 5, 3, 2, 6] then removals make the following sequence of words "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya".
Sergey knows this permutation. His goal is to stop his sister at some point and continue removing by himself to get the word p. Since Nastya likes this activity, Sergey wants to stop her as late as possible. Your task is to determine, how many letters Nastya can remove before she will be stopped by Sergey.
It is guaranteed that the word p can be obtained by removing the letters from word t.
Input
The first and second lines of the input contain the words t and p, respectively. Words are composed of lowercase letters of the Latin alphabet (1 ≤ |p| < |t| ≤ 200 000). It is guaranteed that the word p can be obtained by removing the letters from word t.
Next line contains a permutation a1, a2, ..., a|t| of letter indices that specifies the order in which Nastya removes letters of t (1 ≤ ai ≤ |t|, all ai are distinct).
Output
Print a single integer number, the maximum number of letters that Nastya can remove.
Examples
Input
ababcba
abb
5 3 4 1 7 6 2
Output
3
Input
bbbabb
bb
1 6 3 4 2 5
Output
4
Note
In the first sample test sequence of removing made by Nastya looks like this:
"ababcba" <image> "ababcba" <image> "ababcba" <image> "ababcba"
Nastya can not continue, because it is impossible to get word "abb" from word "ababcba".
So, Nastya will remove only three letters.
Submitted Solution:
```
def can(m):
u = sorted(a[:m])
inp = 0
inu = 0
for i in range(len(t)):
if inu < len(u) and i == u[inu] - 1:
inu += 1
elif t[i] == p[inp]:
inp += 1
if inp == len(p):
return True
return False
t = input()
p = input()
a = list(map(int, input().split()))
l = 0
r = len(t)
while r - l > 1:
m = (r + l) // 2
if can(m):
l = m
else:
r = m
print(l)
```
Yes
| 47,585
|
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] | 6
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Little Nastya has a hobby, she likes to remove some letters from word, to obtain another word. But it turns out to be pretty hard for her, because she is too young. Therefore, her brother Sergey always helps her.
Sergey gives Nastya the word t and wants to get the word p out of it. Nastya removes letters in a certain order (one after another, in this order strictly), which is specified by permutation of letters' indices of the word t: a1... a|t|. We denote the length of word x as |x|. Note that after removing one letter, the indices of other letters don't change. For example, if t = "nastya" and a = [4, 1, 5, 3, 2, 6] then removals make the following sequence of words "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya".
Sergey knows this permutation. His goal is to stop his sister at some point and continue removing by himself to get the word p. Since Nastya likes this activity, Sergey wants to stop her as late as possible. Your task is to determine, how many letters Nastya can remove before she will be stopped by Sergey.
It is guaranteed that the word p can be obtained by removing the letters from word t.
Input
The first and second lines of the input contain the words t and p, respectively. Words are composed of lowercase letters of the Latin alphabet (1 ≤ |p| < |t| ≤ 200 000). It is guaranteed that the word p can be obtained by removing the letters from word t.
Next line contains a permutation a1, a2, ..., a|t| of letter indices that specifies the order in which Nastya removes letters of t (1 ≤ ai ≤ |t|, all ai are distinct).
Output
Print a single integer number, the maximum number of letters that Nastya can remove.
Examples
Input
ababcba
abb
5 3 4 1 7 6 2
Output
3
Input
bbbabb
bb
1 6 3 4 2 5
Output
4
Note
In the first sample test sequence of removing made by Nastya looks like this:
"ababcba" <image> "ababcba" <image> "ababcba" <image> "ababcba"
Nastya can not continue, because it is impossible to get word "abb" from word "ababcba".
So, Nastya will remove only three letters.
Submitted Solution:
```
a = input()
b = input()
p = list(map(int,input().split()))
n = len(p)
h = [0]*n
for i in range(n):
p[i]-=1
h[p[i]] = i
def check(s1,s2,g):
m1 = len(s1)
m2 = len(s2)
j = 0
i = 0
while j<m1 and i<m2:
if s1[j] == s2[i] and h[i]>g:
j = j+1
i = i + 1
return j==m1
l = -1
r = n-1
while l<r:
md = (l+r+1)//2
# print(md,p[md],h[p[md]])
if check(b,a,h[p[md]]):
# print(md,p[md],h[p[md]])
l = md
else:
r = md-1
print(l+1)
```
Yes
| 47,586
|
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] | 6
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Little Nastya has a hobby, she likes to remove some letters from word, to obtain another word. But it turns out to be pretty hard for her, because she is too young. Therefore, her brother Sergey always helps her.
Sergey gives Nastya the word t and wants to get the word p out of it. Nastya removes letters in a certain order (one after another, in this order strictly), which is specified by permutation of letters' indices of the word t: a1... a|t|. We denote the length of word x as |x|. Note that after removing one letter, the indices of other letters don't change. For example, if t = "nastya" and a = [4, 1, 5, 3, 2, 6] then removals make the following sequence of words "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya".
Sergey knows this permutation. His goal is to stop his sister at some point and continue removing by himself to get the word p. Since Nastya likes this activity, Sergey wants to stop her as late as possible. Your task is to determine, how many letters Nastya can remove before she will be stopped by Sergey.
It is guaranteed that the word p can be obtained by removing the letters from word t.
Input
The first and second lines of the input contain the words t and p, respectively. Words are composed of lowercase letters of the Latin alphabet (1 ≤ |p| < |t| ≤ 200 000). It is guaranteed that the word p can be obtained by removing the letters from word t.
Next line contains a permutation a1, a2, ..., a|t| of letter indices that specifies the order in which Nastya removes letters of t (1 ≤ ai ≤ |t|, all ai are distinct).
Output
Print a single integer number, the maximum number of letters that Nastya can remove.
Examples
Input
ababcba
abb
5 3 4 1 7 6 2
Output
3
Input
bbbabb
bb
1 6 3 4 2 5
Output
4
Note
In the first sample test sequence of removing made by Nastya looks like this:
"ababcba" <image> "ababcba" <image> "ababcba" <image> "ababcba"
Nastya can not continue, because it is impossible to get word "abb" from word "ababcba".
So, Nastya will remove only three letters.
Submitted Solution:
```
#------------------------template--------------------------#
import os
import sys
from math import *
from collections import *
# from fractions import *
# from heapq import*
from bisect import *
from io import BytesIO, IOBase
def vsInput():
sys.stdin = open('input.txt', 'r')
sys.stdout = open('output.txt', 'w')
BUFSIZE = 8192
class FastIO(IOBase):
newlines = 0
def __init__(self, file):
self._fd = file.fileno()
self.buffer = BytesIO()
self.writable = "x" in file.mode or "r" not in file.mode
self.write = self.buffer.write if self.writable else None
def read(self):
while True:
b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
if not b:
break
ptr = self.buffer.tell()
self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
self.newlines = 0
return self.buffer.read()
def readline(self):
while self.newlines == 0:
b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
self.newlines = b.count(b"\n") + (not b)
ptr = self.buffer.tell()
self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
self.newlines -= 1
return self.buffer.readline()
def flush(self):
if self.writable:
os.write(self._fd, self.buffer.getvalue())
self.buffer.truncate(0), self.buffer.seek(0)
class IOWrapper(IOBase):
def __init__(self, file):
self.buffer = FastIO(file)
self.flush = self.buffer.flush
self.writable = self.buffer.writable
self.write = lambda s: self.buffer.write(s.encode("ascii"))
self.read = lambda: self.buffer.read().decode("ascii")
self.readline = lambda: self.buffer.readline().decode("ascii")
sys.stdin, sys.stdout = IOWrapper(sys.stdin), IOWrapper(sys.stdout)
input = lambda: sys.stdin.readline().rstrip("\r\n")
ALPHA='abcdefghijklmnopqrstuvwxyz/'
M=1000000007
EPS=1e-6
def Ceil(a,b): return a//b+int(a%b>0)
def value():return tuple(map(int,input().split()))
def array():return [int(i) for i in input().split()]
def Int():return int(input())
def Str():return input()
def arrayS():return [i for i in input().split()]
#-------------------------code---------------------------#
# vsInput()
def sub(x):
have=set(a[:x])
i=0
j=0
while(i<len(s) and j<len(t)):
if(i+1 not in have and s[i]==t[j]): j+=1
i+=1
return j==len(t)
s=input()
t=input()
a=array()
low=0
high=len(a)
# print(sub(3))
while(low<=high):
mid=low+(high-low)//2
if(sub(mid)):
ans=mid
low=mid+1
else:
high=mid-1
print(ans)
```
Yes
| 47,587
|
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] | 6
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Little Nastya has a hobby, she likes to remove some letters from word, to obtain another word. But it turns out to be pretty hard for her, because she is too young. Therefore, her brother Sergey always helps her.
Sergey gives Nastya the word t and wants to get the word p out of it. Nastya removes letters in a certain order (one after another, in this order strictly), which is specified by permutation of letters' indices of the word t: a1... a|t|. We denote the length of word x as |x|. Note that after removing one letter, the indices of other letters don't change. For example, if t = "nastya" and a = [4, 1, 5, 3, 2, 6] then removals make the following sequence of words "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya".
Sergey knows this permutation. His goal is to stop his sister at some point and continue removing by himself to get the word p. Since Nastya likes this activity, Sergey wants to stop her as late as possible. Your task is to determine, how many letters Nastya can remove before she will be stopped by Sergey.
It is guaranteed that the word p can be obtained by removing the letters from word t.
Input
The first and second lines of the input contain the words t and p, respectively. Words are composed of lowercase letters of the Latin alphabet (1 ≤ |p| < |t| ≤ 200 000). It is guaranteed that the word p can be obtained by removing the letters from word t.
Next line contains a permutation a1, a2, ..., a|t| of letter indices that specifies the order in which Nastya removes letters of t (1 ≤ ai ≤ |t|, all ai are distinct).
Output
Print a single integer number, the maximum number of letters that Nastya can remove.
Examples
Input
ababcba
abb
5 3 4 1 7 6 2
Output
3
Input
bbbabb
bb
1 6 3 4 2 5
Output
4
Note
In the first sample test sequence of removing made by Nastya looks like this:
"ababcba" <image> "ababcba" <image> "ababcba" <image> "ababcba"
Nastya can not continue, because it is impossible to get word "abb" from word "ababcba".
So, Nastya will remove only three letters.
Submitted Solution:
```
s = list(input().strip())
t = input().strip()
sq = [int(a) for a in input().strip().split()]
l = len(s)
lt = len(t)
def check(x):
tmp = s.copy()
for i in range(x):
tmp[sq[i]-1] = '_'
idx = 0
for i in range(l):
if tmp[i]==t[idx]:
idx+=1
if idx==lt:
return True
return False
low = 0
high = l
while(low<=high):
mid = (low + high) >> 1
if check(mid):
low = mid + 1
else:
high = mid - 1
print(high)
```
Yes
| 47,588
|
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] | 6
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Little Nastya has a hobby, she likes to remove some letters from word, to obtain another word. But it turns out to be pretty hard for her, because she is too young. Therefore, her brother Sergey always helps her.
Sergey gives Nastya the word t and wants to get the word p out of it. Nastya removes letters in a certain order (one after another, in this order strictly), which is specified by permutation of letters' indices of the word t: a1... a|t|. We denote the length of word x as |x|. Note that after removing one letter, the indices of other letters don't change. For example, if t = "nastya" and a = [4, 1, 5, 3, 2, 6] then removals make the following sequence of words "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya".
Sergey knows this permutation. His goal is to stop his sister at some point and continue removing by himself to get the word p. Since Nastya likes this activity, Sergey wants to stop her as late as possible. Your task is to determine, how many letters Nastya can remove before she will be stopped by Sergey.
It is guaranteed that the word p can be obtained by removing the letters from word t.
Input
The first and second lines of the input contain the words t and p, respectively. Words are composed of lowercase letters of the Latin alphabet (1 ≤ |p| < |t| ≤ 200 000). It is guaranteed that the word p can be obtained by removing the letters from word t.
Next line contains a permutation a1, a2, ..., a|t| of letter indices that specifies the order in which Nastya removes letters of t (1 ≤ ai ≤ |t|, all ai are distinct).
Output
Print a single integer number, the maximum number of letters that Nastya can remove.
Examples
Input
ababcba
abb
5 3 4 1 7 6 2
Output
3
Input
bbbabb
bb
1 6 3 4 2 5
Output
4
Note
In the first sample test sequence of removing made by Nastya looks like this:
"ababcba" <image> "ababcba" <image> "ababcba" <image> "ababcba"
Nastya can not continue, because it is impossible to get word "abb" from word "ababcba".
So, Nastya will remove only three letters.
Submitted Solution:
```
def is_subseq(x, y):
"""Check whether x is a subsequence of y."""
it = iter(y)
return all(c in it for c in x)
t, p = input(), input()
a = [e-1 for e in map(int, input().split())]
r = ''.join(t[i] for i in a)
ri, pi = r[::-1], p[::-1]
it = iter(ri)
all(c in it for c in pi)
n = len(tuple(it))
b = ''.join(t[i] for i in sorted(a[n:]))
while not is_subseq(p, b):
n -= 1
b = ''.join(t[i] for i in sorted(a[n:]))
print(n)
```
No
| 47,589
|
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] | 6
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Little Nastya has a hobby, she likes to remove some letters from word, to obtain another word. But it turns out to be pretty hard for her, because she is too young. Therefore, her brother Sergey always helps her.
Sergey gives Nastya the word t and wants to get the word p out of it. Nastya removes letters in a certain order (one after another, in this order strictly), which is specified by permutation of letters' indices of the word t: a1... a|t|. We denote the length of word x as |x|. Note that after removing one letter, the indices of other letters don't change. For example, if t = "nastya" and a = [4, 1, 5, 3, 2, 6] then removals make the following sequence of words "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya".
Sergey knows this permutation. His goal is to stop his sister at some point and continue removing by himself to get the word p. Since Nastya likes this activity, Sergey wants to stop her as late as possible. Your task is to determine, how many letters Nastya can remove before she will be stopped by Sergey.
It is guaranteed that the word p can be obtained by removing the letters from word t.
Input
The first and second lines of the input contain the words t and p, respectively. Words are composed of lowercase letters of the Latin alphabet (1 ≤ |p| < |t| ≤ 200 000). It is guaranteed that the word p can be obtained by removing the letters from word t.
Next line contains a permutation a1, a2, ..., a|t| of letter indices that specifies the order in which Nastya removes letters of t (1 ≤ ai ≤ |t|, all ai are distinct).
Output
Print a single integer number, the maximum number of letters that Nastya can remove.
Examples
Input
ababcba
abb
5 3 4 1 7 6 2
Output
3
Input
bbbabb
bb
1 6 3 4 2 5
Output
4
Note
In the first sample test sequence of removing made by Nastya looks like this:
"ababcba" <image> "ababcba" <image> "ababcba" <image> "ababcba"
Nastya can not continue, because it is impossible to get word "abb" from word "ababcba".
So, Nastya will remove only three letters.
Submitted Solution:
```
def check(x):
temp=[]
for i in t:
temp.append(i)
for i in range(x):
temp[a[i]-1]=''
#print(''.join(temp))
l=0;r=0;c=0
while r<len(s) and l<len(t):
if s[r]==temp[l]:
r+=1;c+=1
l+=1
#print(c)
return c==len(s)
t=input()
s=input()
a=list(map(int,input().split()))
lo=0;hi=len(a)-1
while lo<hi-1:
mid=lo+(hi-lo)//2
#print(lo,hi,mid)
if check(mid):
lo=mid
else:
hi=mid
print(lo)
```
No
| 47,590
|
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|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Little Nastya has a hobby, she likes to remove some letters from word, to obtain another word. But it turns out to be pretty hard for her, because she is too young. Therefore, her brother Sergey always helps her.
Sergey gives Nastya the word t and wants to get the word p out of it. Nastya removes letters in a certain order (one after another, in this order strictly), which is specified by permutation of letters' indices of the word t: a1... a|t|. We denote the length of word x as |x|. Note that after removing one letter, the indices of other letters don't change. For example, if t = "nastya" and a = [4, 1, 5, 3, 2, 6] then removals make the following sequence of words "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya".
Sergey knows this permutation. His goal is to stop his sister at some point and continue removing by himself to get the word p. Since Nastya likes this activity, Sergey wants to stop her as late as possible. Your task is to determine, how many letters Nastya can remove before she will be stopped by Sergey.
It is guaranteed that the word p can be obtained by removing the letters from word t.
Input
The first and second lines of the input contain the words t and p, respectively. Words are composed of lowercase letters of the Latin alphabet (1 ≤ |p| < |t| ≤ 200 000). It is guaranteed that the word p can be obtained by removing the letters from word t.
Next line contains a permutation a1, a2, ..., a|t| of letter indices that specifies the order in which Nastya removes letters of t (1 ≤ ai ≤ |t|, all ai are distinct).
Output
Print a single integer number, the maximum number of letters that Nastya can remove.
Examples
Input
ababcba
abb
5 3 4 1 7 6 2
Output
3
Input
bbbabb
bb
1 6 3 4 2 5
Output
4
Note
In the first sample test sequence of removing made by Nastya looks like this:
"ababcba" <image> "ababcba" <image> "ababcba" <image> "ababcba"
Nastya can not continue, because it is impossible to get word "abb" from word "ababcba".
So, Nastya will remove only three letters.
Submitted Solution:
```
t=input()
p=input()
a=input()
b=a.split()
for k in range(len(b)):
b[k]=int(b[k])
low=0
high=len(b)-1
ans=-1
g=list(t)
while low<=high:
mid=(low+high)//2
d=''
for h in range(mid+1):
g[b[h]-1]=""
k=0
for j in range(mid+1,len(b)):
if d!=p:
if g[j]==p[k]:
d+=g[j]
k+=1
else:
break
if (d==p):
low=mid+1
ans=mid
else:
high=mid-1
for hh in range(mid+1):
if (g[b[hh]-1]==""):
g[b[hh]-1]=t[b[hh]-1]
print (ans+1)
```
No
| 47,591
|
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] | 6
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Little Nastya has a hobby, she likes to remove some letters from word, to obtain another word. But it turns out to be pretty hard for her, because she is too young. Therefore, her brother Sergey always helps her.
Sergey gives Nastya the word t and wants to get the word p out of it. Nastya removes letters in a certain order (one after another, in this order strictly), which is specified by permutation of letters' indices of the word t: a1... a|t|. We denote the length of word x as |x|. Note that after removing one letter, the indices of other letters don't change. For example, if t = "nastya" and a = [4, 1, 5, 3, 2, 6] then removals make the following sequence of words "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya" <image> "nastya".
Sergey knows this permutation. His goal is to stop his sister at some point and continue removing by himself to get the word p. Since Nastya likes this activity, Sergey wants to stop her as late as possible. Your task is to determine, how many letters Nastya can remove before she will be stopped by Sergey.
It is guaranteed that the word p can be obtained by removing the letters from word t.
Input
The first and second lines of the input contain the words t and p, respectively. Words are composed of lowercase letters of the Latin alphabet (1 ≤ |p| < |t| ≤ 200 000). It is guaranteed that the word p can be obtained by removing the letters from word t.
Next line contains a permutation a1, a2, ..., a|t| of letter indices that specifies the order in which Nastya removes letters of t (1 ≤ ai ≤ |t|, all ai are distinct).
Output
Print a single integer number, the maximum number of letters that Nastya can remove.
Examples
Input
ababcba
abb
5 3 4 1 7 6 2
Output
3
Input
bbbabb
bb
1 6 3 4 2 5
Output
4
Note
In the first sample test sequence of removing made by Nastya looks like this:
"ababcba" <image> "ababcba" <image> "ababcba" <image> "ababcba"
Nastya can not continue, because it is impossible to get word "abb" from word "ababcba".
So, Nastya will remove only three letters.
Submitted Solution:
```
from bisect import bisect_left
from math import pi
def isSubSequence(str1,str2,m,n):
j = 0
i = 0
while j<m and i<n:
if str1[j] == str2[i]:
j = j+1
i = i + 1
return j==m
def searchCandies(t,p,a):
l,h,m,ans=0,len(t),0,0
while(h>=l):
m,s,te=l+(h-l)//2,0,t
if(m<len(a)):
te=list(te)
for i in range(m):
te[a[i]-1]='0'
te="".join(te)
if(isSubSequence(p,te,len(p),len(te))):
ans=m
# print(ans)
l=m+1
else:
h=m-1
return ans
def main():
t=input()
p=input()
a=list(map(int,input().split()))
print(searchCandies(t,p,a))
main()
```
No
| 47,592
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
The ancient Berlanders believed that the longer the name, the more important its bearer is. Thus, Berland kings were famous for their long names. But long names are somewhat inconvenient, so the Berlanders started to abbreviate the names of their kings. They called every king by the first letters of its name. Thus, the king, whose name was Victorious Vasily Pupkin, was always called by the berlanders VVP.
In Berland over its long history many dynasties of kings replaced each other, but they were all united by common traditions. Thus, according to one Berland traditions, to maintain stability in the country, the first name of the heir should be the same as the last name his predecessor (hence, the first letter of the abbreviated name of the heir coincides with the last letter of the abbreviated name of the predecessor). Berlanders appreciate stability, so this tradition has never been broken. Also Berlanders like perfection, so another tradition requires that the first name of the first king in the dynasty coincides with the last name of the last king in this dynasty (hence, the first letter of the abbreviated name of the first king coincides with the last letter of the abbreviated name of the last king). This tradition, of course, has also been always observed.
The name of a dynasty is formed by very simple rules: we take all the short names of the kings in the order in which they ruled, and write them in one line. Thus, a dynasty of kings "ab" and "ba" is called "abba", and the dynasty, which had only the king "abca", is called "abca".
Vasya, a historian, has recently found a list of abbreviated names of all Berland kings and their relatives. Help Vasya to find the maximally long name of the dynasty that could have existed in Berland.
Note that in his list all the names are ordered by the time, that is, if name A is earlier in the list than B, then if A and B were kings, then king A ruled before king B.
Input
The first line contains integer n (1 ≤ n ≤ 5·105) — the number of names in Vasya's list. Next n lines contain n abbreviated names, one per line. An abbreviated name is a non-empty sequence of lowercase Latin letters. Its length does not exceed 10 characters.
Output
Print a single number — length of the sought dynasty's name in letters.
If Vasya's list is wrong and no dynasty can be found there, print a single number 0.
Examples
Input
3
abc
ca
cba
Output
6
Input
4
vvp
vvp
dam
vvp
Output
0
Input
3
ab
c
def
Output
1
Note
In the first sample two dynasties can exist: the one called "abcca" (with the first and second kings) and the one called "abccba" (with the first and third kings).
In the second sample there aren't acceptable dynasties.
The only dynasty in the third sample consists of one king, his name is "c".
Tags: dp
Correct Solution:
```
import sys
import math
from heapq import *;
input = sys.stdin.readline
from functools import cmp_to_key;
def pi():
return(int(input()))
def pl():
return(int(input(), 16))
def ti():
return(list(map(int,input().split())))
def ts():
s = input()
return(list(s[:len(s) - 1]))
def invr():
return(map(int,input().split()))
mod = 1000000007;
f = [];
def fact(n,m):
global f;
f = [1 for i in range(n+1)];
f[0] = 1;
for i in range(1,n+1):
f[i] = (f[i-1]*i)%m;
def fast_mod_exp(a,b,m):
res = 1;
while b > 0:
if b & 1:
res = (res*a)%m;
a = (a*a)%m;
b = b >> 1;
return res;
def inverseMod(n,m):
return fast_mod_exp(n,m-2,m);
def ncr(n,r,m):
if n < 0 or r < 0 or r > n: return 0;
if r == 0: return 1;
return ((f[n]*inverseMod(f[n-r],m))%m*inverseMod(f[r],m))%m;
def main():
C();
def C():
n = pi();
x = [];
dp = [[0 for j in range(26)] for i in range(26)];
ans = 0;
for i in range(n):
x.append(input()[:-1]);
l = ord(x[i][0]) - ord('a');
r = ord(x[i][len(x[i])-1]) - ord('a');
for j in range(26):
if dp[j][l] != 0:
dp[j][r] = max(dp[j][r], dp[j][l]+len(x[i]));
dp[l][r] = max(dp[l][r], len(x[i]));
for i in range(26):
ans = max(ans, dp[i][i]);
print(ans);
main();
```
| 48,183
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
The ancient Berlanders believed that the longer the name, the more important its bearer is. Thus, Berland kings were famous for their long names. But long names are somewhat inconvenient, so the Berlanders started to abbreviate the names of their kings. They called every king by the first letters of its name. Thus, the king, whose name was Victorious Vasily Pupkin, was always called by the berlanders VVP.
In Berland over its long history many dynasties of kings replaced each other, but they were all united by common traditions. Thus, according to one Berland traditions, to maintain stability in the country, the first name of the heir should be the same as the last name his predecessor (hence, the first letter of the abbreviated name of the heir coincides with the last letter of the abbreviated name of the predecessor). Berlanders appreciate stability, so this tradition has never been broken. Also Berlanders like perfection, so another tradition requires that the first name of the first king in the dynasty coincides with the last name of the last king in this dynasty (hence, the first letter of the abbreviated name of the first king coincides with the last letter of the abbreviated name of the last king). This tradition, of course, has also been always observed.
The name of a dynasty is formed by very simple rules: we take all the short names of the kings in the order in which they ruled, and write them in one line. Thus, a dynasty of kings "ab" and "ba" is called "abba", and the dynasty, which had only the king "abca", is called "abca".
Vasya, a historian, has recently found a list of abbreviated names of all Berland kings and their relatives. Help Vasya to find the maximally long name of the dynasty that could have existed in Berland.
Note that in his list all the names are ordered by the time, that is, if name A is earlier in the list than B, then if A and B were kings, then king A ruled before king B.
Input
The first line contains integer n (1 ≤ n ≤ 5·105) — the number of names in Vasya's list. Next n lines contain n abbreviated names, one per line. An abbreviated name is a non-empty sequence of lowercase Latin letters. Its length does not exceed 10 characters.
Output
Print a single number — length of the sought dynasty's name in letters.
If Vasya's list is wrong and no dynasty can be found there, print a single number 0.
Examples
Input
3
abc
ca
cba
Output
6
Input
4
vvp
vvp
dam
vvp
Output
0
Input
3
ab
c
def
Output
1
Note
In the first sample two dynasties can exist: the one called "abcca" (with the first and second kings) and the one called "abccba" (with the first and third kings).
In the second sample there aren't acceptable dynasties.
The only dynasty in the third sample consists of one king, his name is "c".
Tags: dp
Correct Solution:
```
from sys import stdin
n=int(stdin.readline().strip())
s=[stdin.readline().strip() for i in range(n)]
dp=[[0 for i in range(26)] for j in range(26)]
now=1
last=0
for i in range(n):
a,b=ord(s[i][0])-97,ord(s[i][-1])-97
for j in range(26):
if dp[j][a]>0:
dp[j][b]=max(dp[j][b],dp[j][a]+len(s[i]))
dp[a][b]=max(dp[a][b],len(s[i]))
ans=0
for i in range(26):
ans=max(ans,dp[i][i])
print(ans)
```
| 48,184
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
The ancient Berlanders believed that the longer the name, the more important its bearer is. Thus, Berland kings were famous for their long names. But long names are somewhat inconvenient, so the Berlanders started to abbreviate the names of their kings. They called every king by the first letters of its name. Thus, the king, whose name was Victorious Vasily Pupkin, was always called by the berlanders VVP.
In Berland over its long history many dynasties of kings replaced each other, but they were all united by common traditions. Thus, according to one Berland traditions, to maintain stability in the country, the first name of the heir should be the same as the last name his predecessor (hence, the first letter of the abbreviated name of the heir coincides with the last letter of the abbreviated name of the predecessor). Berlanders appreciate stability, so this tradition has never been broken. Also Berlanders like perfection, so another tradition requires that the first name of the first king in the dynasty coincides with the last name of the last king in this dynasty (hence, the first letter of the abbreviated name of the first king coincides with the last letter of the abbreviated name of the last king). This tradition, of course, has also been always observed.
The name of a dynasty is formed by very simple rules: we take all the short names of the kings in the order in which they ruled, and write them in one line. Thus, a dynasty of kings "ab" and "ba" is called "abba", and the dynasty, which had only the king "abca", is called "abca".
Vasya, a historian, has recently found a list of abbreviated names of all Berland kings and their relatives. Help Vasya to find the maximally long name of the dynasty that could have existed in Berland.
Note that in his list all the names are ordered by the time, that is, if name A is earlier in the list than B, then if A and B were kings, then king A ruled before king B.
Input
The first line contains integer n (1 ≤ n ≤ 5·105) — the number of names in Vasya's list. Next n lines contain n abbreviated names, one per line. An abbreviated name is a non-empty sequence of lowercase Latin letters. Its length does not exceed 10 characters.
Output
Print a single number — length of the sought dynasty's name in letters.
If Vasya's list is wrong and no dynasty can be found there, print a single number 0.
Examples
Input
3
abc
ca
cba
Output
6
Input
4
vvp
vvp
dam
vvp
Output
0
Input
3
ab
c
def
Output
1
Note
In the first sample two dynasties can exist: the one called "abcca" (with the first and second kings) and the one called "abccba" (with the first and third kings).
In the second sample there aren't acceptable dynasties.
The only dynasty in the third sample consists of one king, his name is "c".
Tags: dp
Correct Solution:
```
from sys import stdin
input = stdin.readline
n = int(input())
s = list(input().strip() for _ in range(n))
dp = [[0 for i in range(28)] for j in range(28)]
for i in range(n):
a, b = ord(s[i][0]) - ord('a'), ord(s[i][-1]) - ord('a')
for j in range(26):
if dp[j][a] > 0:
dp[j][b] = max(dp[j][b], dp[j][a] + len(s[i]))
dp[a][b] = max(dp[a][b], len(s[i]))
res = 0
for i in range(26):
res = max(res, dp[i][i])
print(res)
```
| 48,185
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
The ancient Berlanders believed that the longer the name, the more important its bearer is. Thus, Berland kings were famous for their long names. But long names are somewhat inconvenient, so the Berlanders started to abbreviate the names of their kings. They called every king by the first letters of its name. Thus, the king, whose name was Victorious Vasily Pupkin, was always called by the berlanders VVP.
In Berland over its long history many dynasties of kings replaced each other, but they were all united by common traditions. Thus, according to one Berland traditions, to maintain stability in the country, the first name of the heir should be the same as the last name his predecessor (hence, the first letter of the abbreviated name of the heir coincides with the last letter of the abbreviated name of the predecessor). Berlanders appreciate stability, so this tradition has never been broken. Also Berlanders like perfection, so another tradition requires that the first name of the first king in the dynasty coincides with the last name of the last king in this dynasty (hence, the first letter of the abbreviated name of the first king coincides with the last letter of the abbreviated name of the last king). This tradition, of course, has also been always observed.
The name of a dynasty is formed by very simple rules: we take all the short names of the kings in the order in which they ruled, and write them in one line. Thus, a dynasty of kings "ab" and "ba" is called "abba", and the dynasty, which had only the king "abca", is called "abca".
Vasya, a historian, has recently found a list of abbreviated names of all Berland kings and their relatives. Help Vasya to find the maximally long name of the dynasty that could have existed in Berland.
Note that in his list all the names are ordered by the time, that is, if name A is earlier in the list than B, then if A and B were kings, then king A ruled before king B.
Input
The first line contains integer n (1 ≤ n ≤ 5·105) — the number of names in Vasya's list. Next n lines contain n abbreviated names, one per line. An abbreviated name is a non-empty sequence of lowercase Latin letters. Its length does not exceed 10 characters.
Output
Print a single number — length of the sought dynasty's name in letters.
If Vasya's list is wrong and no dynasty can be found there, print a single number 0.
Examples
Input
3
abc
ca
cba
Output
6
Input
4
vvp
vvp
dam
vvp
Output
0
Input
3
ab
c
def
Output
1
Note
In the first sample two dynasties can exist: the one called "abcca" (with the first and second kings) and the one called "abccba" (with the first and third kings).
In the second sample there aren't acceptable dynasties.
The only dynasty in the third sample consists of one king, his name is "c".
Tags: dp
Correct Solution:
```
from sys import stdin, stdout
fst = 97
sze = 26
values = [[0 for i in range(sze)] for j in range(sze)]
n = int(stdin.readline())
challengers = []
for i in range(n):
s = stdin.readline().strip()
challengers.append((ord(s[0]) - fst, ord(s[-1]) - fst))
for i in range(sze):
if values[i][challengers[-1][0]]:
values[i][challengers[-1][1]] = max(values[i][challengers[-1][1]], values[i][challengers[-1][0]] + len(s))
values[challengers[-1][0]][challengers[-1][1]] = max(values[challengers[-1][0]][challengers[-1][1]], len(s))
ans = 0
for i in range(sze):
ans = max(ans, values[i][i])
stdout.write(str(ans))
```
| 48,186
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
After the contest in comparing numbers, Shapur's teacher found out that he is a real genius and that no one could possibly do the calculations faster than him even using a super computer!
Some days before the contest, the teacher took a very simple-looking exam and all his n students took part in the exam. The teacher gave them 3 strings and asked them to concatenate them. Concatenating strings means to put them in some arbitrary order one after the other. For example from concatenating Alireza and Amir we can get to AlirezaAmir or AmirAlireza depending on the order of concatenation.
Unfortunately enough, the teacher forgot to ask students to concatenate their strings in a pre-defined order so each student did it the way he/she liked.
Now the teacher knows that Shapur is such a fast-calculating genius boy and asks him to correct the students' papers.
Shapur is not good at doing such a time-taking task. He rather likes to finish up with it as soon as possible and take his time to solve 3-SAT in polynomial time. Moreover, the teacher has given some advice that Shapur has to follow. Here's what the teacher said:
* As I expect you know, the strings I gave to my students (including you) contained only lowercase and uppercase Persian Mikhi-Script letters. These letters are too much like Latin letters, so to make your task much harder I converted all the initial strings and all of the students' answers to Latin.
* As latin alphabet has much less characters than Mikhi-Script, I added three odd-looking characters to the answers, these include "-", ";" and "_". These characters are my own invention of course! And I call them Signs.
* The length of all initial strings was less than or equal to 100 and the lengths of my students' answers are less than or equal to 600
* My son, not all students are genius as you are. It is quite possible that they make minor mistakes changing case of some characters. For example they may write ALiReZaAmIR instead of AlirezaAmir. Don't be picky and ignore these mistakes.
* Those signs which I previously talked to you about are not important. You can ignore them, since many students are in the mood for adding extra signs or forgetting about a sign. So something like Iran;;-- is the same as --;IRAN
* You should indicate for any of my students if his answer was right or wrong. Do this by writing "WA" for Wrong answer or "ACC" for a correct answer.
* I should remind you that none of the strings (initial strings or answers) are empty.
* Finally, do these as soon as possible. You have less than 2 hours to complete this.
Input
The first three lines contain a string each. These are the initial strings. They consists only of lowercase and uppercase Latin letters and signs ("-", ";" and "_"). All the initial strings have length from 1 to 100, inclusively.
In the fourth line there is a single integer n (0 ≤ n ≤ 1000), the number of students.
Next n lines contain a student's answer each. It is guaranteed that the answer meets what the teacher said. Each answer iconsists only of lowercase and uppercase Latin letters and signs ("-", ";" and "_"). Length is from 1 to 600, inclusively.
Output
For each student write in a different line. Print "WA" if his answer is wrong or "ACC" if his answer is OK.
Examples
Input
Iran_
Persian;
W_o;n;d;e;r;f;u;l;
7
WonderfulPersianIran
wonderful_PersIAN_IRAN;;_
WONDERFUL___IRAN__PERSIAN__;;
Ira__Persiann__Wonderful
Wonder;;fulPersian___;I;r;a;n;
__________IranPersianWonderful__________
PersianIran_is_Wonderful
Output
ACC
ACC
ACC
WA
ACC
ACC
WA
Input
Shapur;;
is___
a_genius
3
Shapur__a_is___geniUs
is___shapur___a__Genius;
Shapur;;is;;a;;geni;;us;;
Output
WA
ACC
ACC
Tags: strings
Correct Solution:
```
#Hard Work
s = []
for i in range(3):
tmp = input()
s.append(tmp)
for i in range(3):
tmp = ""
for ch in s[i]:
if ch != '-' and ch != ';' and ch != '_':
tmp += ch
s[i] = tmp.lower()
res = []
for i in range(3):
for j in range(3):
tmp = s[i]
if j != i:
tmp += s[j]
for k in range(3):
if i != k and j != k:
tmp += s[k]
res.append(tmp)
n = int(input())
for i in range(n):
str = input()
tmp = ""
for ch in str:
if ch != '-' and ch != ';' and ch != '_':
tmp += ch
if tmp.lower() in res:
print('ACC')
else:
print('WA')
```
| 48,366
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
After the contest in comparing numbers, Shapur's teacher found out that he is a real genius and that no one could possibly do the calculations faster than him even using a super computer!
Some days before the contest, the teacher took a very simple-looking exam and all his n students took part in the exam. The teacher gave them 3 strings and asked them to concatenate them. Concatenating strings means to put them in some arbitrary order one after the other. For example from concatenating Alireza and Amir we can get to AlirezaAmir or AmirAlireza depending on the order of concatenation.
Unfortunately enough, the teacher forgot to ask students to concatenate their strings in a pre-defined order so each student did it the way he/she liked.
Now the teacher knows that Shapur is such a fast-calculating genius boy and asks him to correct the students' papers.
Shapur is not good at doing such a time-taking task. He rather likes to finish up with it as soon as possible and take his time to solve 3-SAT in polynomial time. Moreover, the teacher has given some advice that Shapur has to follow. Here's what the teacher said:
* As I expect you know, the strings I gave to my students (including you) contained only lowercase and uppercase Persian Mikhi-Script letters. These letters are too much like Latin letters, so to make your task much harder I converted all the initial strings and all of the students' answers to Latin.
* As latin alphabet has much less characters than Mikhi-Script, I added three odd-looking characters to the answers, these include "-", ";" and "_". These characters are my own invention of course! And I call them Signs.
* The length of all initial strings was less than or equal to 100 and the lengths of my students' answers are less than or equal to 600
* My son, not all students are genius as you are. It is quite possible that they make minor mistakes changing case of some characters. For example they may write ALiReZaAmIR instead of AlirezaAmir. Don't be picky and ignore these mistakes.
* Those signs which I previously talked to you about are not important. You can ignore them, since many students are in the mood for adding extra signs or forgetting about a sign. So something like Iran;;-- is the same as --;IRAN
* You should indicate for any of my students if his answer was right or wrong. Do this by writing "WA" for Wrong answer or "ACC" for a correct answer.
* I should remind you that none of the strings (initial strings or answers) are empty.
* Finally, do these as soon as possible. You have less than 2 hours to complete this.
Input
The first three lines contain a string each. These are the initial strings. They consists only of lowercase and uppercase Latin letters and signs ("-", ";" and "_"). All the initial strings have length from 1 to 100, inclusively.
In the fourth line there is a single integer n (0 ≤ n ≤ 1000), the number of students.
Next n lines contain a student's answer each. It is guaranteed that the answer meets what the teacher said. Each answer iconsists only of lowercase and uppercase Latin letters and signs ("-", ";" and "_"). Length is from 1 to 600, inclusively.
Output
For each student write in a different line. Print "WA" if his answer is wrong or "ACC" if his answer is OK.
Examples
Input
Iran_
Persian;
W_o;n;d;e;r;f;u;l;
7
WonderfulPersianIran
wonderful_PersIAN_IRAN;;_
WONDERFUL___IRAN__PERSIAN__;;
Ira__Persiann__Wonderful
Wonder;;fulPersian___;I;r;a;n;
__________IranPersianWonderful__________
PersianIran_is_Wonderful
Output
ACC
ACC
ACC
WA
ACC
ACC
WA
Input
Shapur;;
is___
a_genius
3
Shapur__a_is___geniUs
is___shapur___a__Genius;
Shapur;;is;;a;;geni;;us;;
Output
WA
ACC
ACC
Tags: strings
Correct Solution:
```
def foo(s):
s=''.join(s.split('-'))
s=''.join(s.split(';'))
s=''.join(s.split('_'))
return s.lower()
s1=foo(input())
s2=foo(input())
s3=foo(input())
n=int(input())
arr=[s1+s2+s3,s1+s3+s2,s2+s1+s3,s2+s3+s1,s3+s1+s2,s3+s2+s1]
for _ in range(n):
if foo(input()) in arr:
print('ACC')
else:
print('WA')
```
| 48,367
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
After the contest in comparing numbers, Shapur's teacher found out that he is a real genius and that no one could possibly do the calculations faster than him even using a super computer!
Some days before the contest, the teacher took a very simple-looking exam and all his n students took part in the exam. The teacher gave them 3 strings and asked them to concatenate them. Concatenating strings means to put them in some arbitrary order one after the other. For example from concatenating Alireza and Amir we can get to AlirezaAmir or AmirAlireza depending on the order of concatenation.
Unfortunately enough, the teacher forgot to ask students to concatenate their strings in a pre-defined order so each student did it the way he/she liked.
Now the teacher knows that Shapur is such a fast-calculating genius boy and asks him to correct the students' papers.
Shapur is not good at doing such a time-taking task. He rather likes to finish up with it as soon as possible and take his time to solve 3-SAT in polynomial time. Moreover, the teacher has given some advice that Shapur has to follow. Here's what the teacher said:
* As I expect you know, the strings I gave to my students (including you) contained only lowercase and uppercase Persian Mikhi-Script letters. These letters are too much like Latin letters, so to make your task much harder I converted all the initial strings and all of the students' answers to Latin.
* As latin alphabet has much less characters than Mikhi-Script, I added three odd-looking characters to the answers, these include "-", ";" and "_". These characters are my own invention of course! And I call them Signs.
* The length of all initial strings was less than or equal to 100 and the lengths of my students' answers are less than or equal to 600
* My son, not all students are genius as you are. It is quite possible that they make minor mistakes changing case of some characters. For example they may write ALiReZaAmIR instead of AlirezaAmir. Don't be picky and ignore these mistakes.
* Those signs which I previously talked to you about are not important. You can ignore them, since many students are in the mood for adding extra signs or forgetting about a sign. So something like Iran;;-- is the same as --;IRAN
* You should indicate for any of my students if his answer was right or wrong. Do this by writing "WA" for Wrong answer or "ACC" for a correct answer.
* I should remind you that none of the strings (initial strings or answers) are empty.
* Finally, do these as soon as possible. You have less than 2 hours to complete this.
Input
The first three lines contain a string each. These are the initial strings. They consists only of lowercase and uppercase Latin letters and signs ("-", ";" and "_"). All the initial strings have length from 1 to 100, inclusively.
In the fourth line there is a single integer n (0 ≤ n ≤ 1000), the number of students.
Next n lines contain a student's answer each. It is guaranteed that the answer meets what the teacher said. Each answer iconsists only of lowercase and uppercase Latin letters and signs ("-", ";" and "_"). Length is from 1 to 600, inclusively.
Output
For each student write in a different line. Print "WA" if his answer is wrong or "ACC" if his answer is OK.
Examples
Input
Iran_
Persian;
W_o;n;d;e;r;f;u;l;
7
WonderfulPersianIran
wonderful_PersIAN_IRAN;;_
WONDERFUL___IRAN__PERSIAN__;;
Ira__Persiann__Wonderful
Wonder;;fulPersian___;I;r;a;n;
__________IranPersianWonderful__________
PersianIran_is_Wonderful
Output
ACC
ACC
ACC
WA
ACC
ACC
WA
Input
Shapur;;
is___
a_genius
3
Shapur__a_is___geniUs
is___shapur___a__Genius;
Shapur;;is;;a;;geni;;us;;
Output
WA
ACC
ACC
Tags: strings
Correct Solution:
```
import string
a = input()
b = input()
c = input()
t = []
s = ""
s0 = ""
s1 = ""
reponse = ""
for i in range(len(a)):
if a[i] not in string.punctuation :
s = s + a[i]
for i in range(len(b)):
if b[i] not in string.punctuation :
s0 = s0 + b[i]
for i in range(len(c)):
if c[i] not in string.punctuation :
s1 = s1 + c[i]
n = int(input())
for i in range(n):
x = input()
s2 = ""
for j in range(len(x)) :
if x[j] not in string.punctuation :
s2 = s2 + x[j]
if ((s2.lower() == (s + s0 + s1).lower()) or (s2.lower() == (s + s1 + s0).lower()) or (s2.lower() == (s0 + s + s1).lower()) or (s2.lower() == (s0 + s1 + s).lower()) or (s2.lower() == (s1 + s0 + s).lower()) or (s2.lower() == (s1 + s + s0).lower())):
reponse = "ACC"
else :
reponse = "WA"
t.append(reponse)
for i in range(len(t)):
print(t[i])
```
| 48,368
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
After the contest in comparing numbers, Shapur's teacher found out that he is a real genius and that no one could possibly do the calculations faster than him even using a super computer!
Some days before the contest, the teacher took a very simple-looking exam and all his n students took part in the exam. The teacher gave them 3 strings and asked them to concatenate them. Concatenating strings means to put them in some arbitrary order one after the other. For example from concatenating Alireza and Amir we can get to AlirezaAmir or AmirAlireza depending on the order of concatenation.
Unfortunately enough, the teacher forgot to ask students to concatenate their strings in a pre-defined order so each student did it the way he/she liked.
Now the teacher knows that Shapur is such a fast-calculating genius boy and asks him to correct the students' papers.
Shapur is not good at doing such a time-taking task. He rather likes to finish up with it as soon as possible and take his time to solve 3-SAT in polynomial time. Moreover, the teacher has given some advice that Shapur has to follow. Here's what the teacher said:
* As I expect you know, the strings I gave to my students (including you) contained only lowercase and uppercase Persian Mikhi-Script letters. These letters are too much like Latin letters, so to make your task much harder I converted all the initial strings and all of the students' answers to Latin.
* As latin alphabet has much less characters than Mikhi-Script, I added three odd-looking characters to the answers, these include "-", ";" and "_". These characters are my own invention of course! And I call them Signs.
* The length of all initial strings was less than or equal to 100 and the lengths of my students' answers are less than or equal to 600
* My son, not all students are genius as you are. It is quite possible that they make minor mistakes changing case of some characters. For example they may write ALiReZaAmIR instead of AlirezaAmir. Don't be picky and ignore these mistakes.
* Those signs which I previously talked to you about are not important. You can ignore them, since many students are in the mood for adding extra signs or forgetting about a sign. So something like Iran;;-- is the same as --;IRAN
* You should indicate for any of my students if his answer was right or wrong. Do this by writing "WA" for Wrong answer or "ACC" for a correct answer.
* I should remind you that none of the strings (initial strings or answers) are empty.
* Finally, do these as soon as possible. You have less than 2 hours to complete this.
Input
The first three lines contain a string each. These are the initial strings. They consists only of lowercase and uppercase Latin letters and signs ("-", ";" and "_"). All the initial strings have length from 1 to 100, inclusively.
In the fourth line there is a single integer n (0 ≤ n ≤ 1000), the number of students.
Next n lines contain a student's answer each. It is guaranteed that the answer meets what the teacher said. Each answer iconsists only of lowercase and uppercase Latin letters and signs ("-", ";" and "_"). Length is from 1 to 600, inclusively.
Output
For each student write in a different line. Print "WA" if his answer is wrong or "ACC" if his answer is OK.
Examples
Input
Iran_
Persian;
W_o;n;d;e;r;f;u;l;
7
WonderfulPersianIran
wonderful_PersIAN_IRAN;;_
WONDERFUL___IRAN__PERSIAN__;;
Ira__Persiann__Wonderful
Wonder;;fulPersian___;I;r;a;n;
__________IranPersianWonderful__________
PersianIran_is_Wonderful
Output
ACC
ACC
ACC
WA
ACC
ACC
WA
Input
Shapur;;
is___
a_genius
3
Shapur__a_is___geniUs
is___shapur___a__Genius;
Shapur;;is;;a;;geni;;us;;
Output
WA
ACC
ACC
Tags: strings
Correct Solution:
```
from sys import stdin, stdout
def changing(s):
return s.replace('_', '').replace('-', '').replace(';', '').lower()
s1 = changing(stdin.readline().strip())
s2 = changing(stdin.readline().strip())
s3 = changing(stdin.readline().strip())
n = int(stdin.readline())
for i in range(n):
conc = changing(stdin.readline().strip())
if conc == (s1 + s2 + s3) or conc == (s1 + s3 + s2) or conc == (s2 + s1 + s3) or conc == (s2 + s3 + s1) or conc == (s3 + s1 + s2) or conc == (s3 + s2 + s1):
stdout.write('ACC\n')
else:
stdout.write('WA\n')
```
| 48,369
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
After the contest in comparing numbers, Shapur's teacher found out that he is a real genius and that no one could possibly do the calculations faster than him even using a super computer!
Some days before the contest, the teacher took a very simple-looking exam and all his n students took part in the exam. The teacher gave them 3 strings and asked them to concatenate them. Concatenating strings means to put them in some arbitrary order one after the other. For example from concatenating Alireza and Amir we can get to AlirezaAmir or AmirAlireza depending on the order of concatenation.
Unfortunately enough, the teacher forgot to ask students to concatenate their strings in a pre-defined order so each student did it the way he/she liked.
Now the teacher knows that Shapur is such a fast-calculating genius boy and asks him to correct the students' papers.
Shapur is not good at doing such a time-taking task. He rather likes to finish up with it as soon as possible and take his time to solve 3-SAT in polynomial time. Moreover, the teacher has given some advice that Shapur has to follow. Here's what the teacher said:
* As I expect you know, the strings I gave to my students (including you) contained only lowercase and uppercase Persian Mikhi-Script letters. These letters are too much like Latin letters, so to make your task much harder I converted all the initial strings and all of the students' answers to Latin.
* As latin alphabet has much less characters than Mikhi-Script, I added three odd-looking characters to the answers, these include "-", ";" and "_". These characters are my own invention of course! And I call them Signs.
* The length of all initial strings was less than or equal to 100 and the lengths of my students' answers are less than or equal to 600
* My son, not all students are genius as you are. It is quite possible that they make minor mistakes changing case of some characters. For example they may write ALiReZaAmIR instead of AlirezaAmir. Don't be picky and ignore these mistakes.
* Those signs which I previously talked to you about are not important. You can ignore them, since many students are in the mood for adding extra signs or forgetting about a sign. So something like Iran;;-- is the same as --;IRAN
* You should indicate for any of my students if his answer was right or wrong. Do this by writing "WA" for Wrong answer or "ACC" for a correct answer.
* I should remind you that none of the strings (initial strings or answers) are empty.
* Finally, do these as soon as possible. You have less than 2 hours to complete this.
Input
The first three lines contain a string each. These are the initial strings. They consists only of lowercase and uppercase Latin letters and signs ("-", ";" and "_"). All the initial strings have length from 1 to 100, inclusively.
In the fourth line there is a single integer n (0 ≤ n ≤ 1000), the number of students.
Next n lines contain a student's answer each. It is guaranteed that the answer meets what the teacher said. Each answer iconsists only of lowercase and uppercase Latin letters and signs ("-", ";" and "_"). Length is from 1 to 600, inclusively.
Output
For each student write in a different line. Print "WA" if his answer is wrong or "ACC" if his answer is OK.
Examples
Input
Iran_
Persian;
W_o;n;d;e;r;f;u;l;
7
WonderfulPersianIran
wonderful_PersIAN_IRAN;;_
WONDERFUL___IRAN__PERSIAN__;;
Ira__Persiann__Wonderful
Wonder;;fulPersian___;I;r;a;n;
__________IranPersianWonderful__________
PersianIran_is_Wonderful
Output
ACC
ACC
ACC
WA
ACC
ACC
WA
Input
Shapur;;
is___
a_genius
3
Shapur__a_is___geniUs
is___shapur___a__Genius;
Shapur;;is;;a;;geni;;us;;
Output
WA
ACC
ACC
Tags: strings
Correct Solution:
```
from itertools import permutations
import sys
u=input
l=[u(),u(),u()]
#print(l)
d={';':'' , '-':'', '_':''}
for _ in range(3):
l[_]=''.join(d[s] if s in d else s for s in l[_])
l[_]=l[_].lower();
#print(l)
n=int(u())
for i in range(n):
s=u().lower()
b=0
s=''.join(d[p] if p in d else p for p in s)
#print(s)
for q in permutations(l):
r=''.join(x for x in q)
if(r==s):
b=1
break
print(["WA","ACC"][b])
```
| 48,370
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
After the contest in comparing numbers, Shapur's teacher found out that he is a real genius and that no one could possibly do the calculations faster than him even using a super computer!
Some days before the contest, the teacher took a very simple-looking exam and all his n students took part in the exam. The teacher gave them 3 strings and asked them to concatenate them. Concatenating strings means to put them in some arbitrary order one after the other. For example from concatenating Alireza and Amir we can get to AlirezaAmir or AmirAlireza depending on the order of concatenation.
Unfortunately enough, the teacher forgot to ask students to concatenate their strings in a pre-defined order so each student did it the way he/she liked.
Now the teacher knows that Shapur is such a fast-calculating genius boy and asks him to correct the students' papers.
Shapur is not good at doing such a time-taking task. He rather likes to finish up with it as soon as possible and take his time to solve 3-SAT in polynomial time. Moreover, the teacher has given some advice that Shapur has to follow. Here's what the teacher said:
* As I expect you know, the strings I gave to my students (including you) contained only lowercase and uppercase Persian Mikhi-Script letters. These letters are too much like Latin letters, so to make your task much harder I converted all the initial strings and all of the students' answers to Latin.
* As latin alphabet has much less characters than Mikhi-Script, I added three odd-looking characters to the answers, these include "-", ";" and "_". These characters are my own invention of course! And I call them Signs.
* The length of all initial strings was less than or equal to 100 and the lengths of my students' answers are less than or equal to 600
* My son, not all students are genius as you are. It is quite possible that they make minor mistakes changing case of some characters. For example they may write ALiReZaAmIR instead of AlirezaAmir. Don't be picky and ignore these mistakes.
* Those signs which I previously talked to you about are not important. You can ignore them, since many students are in the mood for adding extra signs or forgetting about a sign. So something like Iran;;-- is the same as --;IRAN
* You should indicate for any of my students if his answer was right or wrong. Do this by writing "WA" for Wrong answer or "ACC" for a correct answer.
* I should remind you that none of the strings (initial strings or answers) are empty.
* Finally, do these as soon as possible. You have less than 2 hours to complete this.
Input
The first three lines contain a string each. These are the initial strings. They consists only of lowercase and uppercase Latin letters and signs ("-", ";" and "_"). All the initial strings have length from 1 to 100, inclusively.
In the fourth line there is a single integer n (0 ≤ n ≤ 1000), the number of students.
Next n lines contain a student's answer each. It is guaranteed that the answer meets what the teacher said. Each answer iconsists only of lowercase and uppercase Latin letters and signs ("-", ";" and "_"). Length is from 1 to 600, inclusively.
Output
For each student write in a different line. Print "WA" if his answer is wrong or "ACC" if his answer is OK.
Examples
Input
Iran_
Persian;
W_o;n;d;e;r;f;u;l;
7
WonderfulPersianIran
wonderful_PersIAN_IRAN;;_
WONDERFUL___IRAN__PERSIAN__;;
Ira__Persiann__Wonderful
Wonder;;fulPersian___;I;r;a;n;
__________IranPersianWonderful__________
PersianIran_is_Wonderful
Output
ACC
ACC
ACC
WA
ACC
ACC
WA
Input
Shapur;;
is___
a_genius
3
Shapur__a_is___geniUs
is___shapur___a__Genius;
Shapur;;is;;a;;geni;;us;;
Output
WA
ACC
ACC
Tags: strings
Correct Solution:
```
import re
def sub(s): return re.sub('[-_;]', '', s).lower()
s1, s2, s3, n, a = sub(input()), sub(input()), sub(input()), int(input()), []
possible = [s1+s2+s3, s1+s3+s2, s2+s1+s3, s2+s3+s1, s3+s1+s2, s3+s2+s1]
for i in range(n):
print('ACC' if sub(input()) in possible else 'WA')
```
| 48,371
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
After the contest in comparing numbers, Shapur's teacher found out that he is a real genius and that no one could possibly do the calculations faster than him even using a super computer!
Some days before the contest, the teacher took a very simple-looking exam and all his n students took part in the exam. The teacher gave them 3 strings and asked them to concatenate them. Concatenating strings means to put them in some arbitrary order one after the other. For example from concatenating Alireza and Amir we can get to AlirezaAmir or AmirAlireza depending on the order of concatenation.
Unfortunately enough, the teacher forgot to ask students to concatenate their strings in a pre-defined order so each student did it the way he/she liked.
Now the teacher knows that Shapur is such a fast-calculating genius boy and asks him to correct the students' papers.
Shapur is not good at doing such a time-taking task. He rather likes to finish up with it as soon as possible and take his time to solve 3-SAT in polynomial time. Moreover, the teacher has given some advice that Shapur has to follow. Here's what the teacher said:
* As I expect you know, the strings I gave to my students (including you) contained only lowercase and uppercase Persian Mikhi-Script letters. These letters are too much like Latin letters, so to make your task much harder I converted all the initial strings and all of the students' answers to Latin.
* As latin alphabet has much less characters than Mikhi-Script, I added three odd-looking characters to the answers, these include "-", ";" and "_". These characters are my own invention of course! And I call them Signs.
* The length of all initial strings was less than or equal to 100 and the lengths of my students' answers are less than or equal to 600
* My son, not all students are genius as you are. It is quite possible that they make minor mistakes changing case of some characters. For example they may write ALiReZaAmIR instead of AlirezaAmir. Don't be picky and ignore these mistakes.
* Those signs which I previously talked to you about are not important. You can ignore them, since many students are in the mood for adding extra signs or forgetting about a sign. So something like Iran;;-- is the same as --;IRAN
* You should indicate for any of my students if his answer was right or wrong. Do this by writing "WA" for Wrong answer or "ACC" for a correct answer.
* I should remind you that none of the strings (initial strings or answers) are empty.
* Finally, do these as soon as possible. You have less than 2 hours to complete this.
Input
The first three lines contain a string each. These are the initial strings. They consists only of lowercase and uppercase Latin letters and signs ("-", ";" and "_"). All the initial strings have length from 1 to 100, inclusively.
In the fourth line there is a single integer n (0 ≤ n ≤ 1000), the number of students.
Next n lines contain a student's answer each. It is guaranteed that the answer meets what the teacher said. Each answer iconsists only of lowercase and uppercase Latin letters and signs ("-", ";" and "_"). Length is from 1 to 600, inclusively.
Output
For each student write in a different line. Print "WA" if his answer is wrong or "ACC" if his answer is OK.
Examples
Input
Iran_
Persian;
W_o;n;d;e;r;f;u;l;
7
WonderfulPersianIran
wonderful_PersIAN_IRAN;;_
WONDERFUL___IRAN__PERSIAN__;;
Ira__Persiann__Wonderful
Wonder;;fulPersian___;I;r;a;n;
__________IranPersianWonderful__________
PersianIran_is_Wonderful
Output
ACC
ACC
ACC
WA
ACC
ACC
WA
Input
Shapur;;
is___
a_genius
3
Shapur__a_is___geniUs
is___shapur___a__Genius;
Shapur;;is;;a;;geni;;us;;
Output
WA
ACC
ACC
Tags: strings
Correct Solution:
```
from collections import Counter
def SomRas(s):
return "".join([item.lower() for item in s if item.isalpha()])
naradmuni = SomRas(input())
vedvyas = SomRas(input())
RishiMuni = SomRas(input())
n = int(input())
for test in range(n):
koi_dikkat = SomRas(input())
was_a_thing = Counter(koi_dikkat)
maybe_a_thing = Counter(naradmuni + vedvyas + RishiMuni)
if was_a_thing != maybe_a_thing:
print("WA")
continue
sort_kiya_hua_cheez = sorted([naradmuni, vedvyas, RishiMuni], key=len)
if sort_kiya_hua_cheez[2] in koi_dikkat:
koi_dikkat = koi_dikkat.split(sort_kiya_hua_cheez[2])
else:
print("WA")
continue
if sort_kiya_hua_cheez[1] in koi_dikkat[0]:
koi_dikkat += koi_dikkat[0].split(sort_kiya_hua_cheez[1])
koi_dikkat = koi_dikkat[1:]
elif sort_kiya_hua_cheez[1] in koi_dikkat[1]:
last = koi_dikkat.pop()
koi_dikkat += last.split(sort_kiya_hua_cheez[1])
else:
print("WA")
continue
if sort_kiya_hua_cheez[0] in koi_dikkat:
print("ACC")
else:
print("WA")
```
| 48,372
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
After the contest in comparing numbers, Shapur's teacher found out that he is a real genius and that no one could possibly do the calculations faster than him even using a super computer!
Some days before the contest, the teacher took a very simple-looking exam and all his n students took part in the exam. The teacher gave them 3 strings and asked them to concatenate them. Concatenating strings means to put them in some arbitrary order one after the other. For example from concatenating Alireza and Amir we can get to AlirezaAmir or AmirAlireza depending on the order of concatenation.
Unfortunately enough, the teacher forgot to ask students to concatenate their strings in a pre-defined order so each student did it the way he/she liked.
Now the teacher knows that Shapur is such a fast-calculating genius boy and asks him to correct the students' papers.
Shapur is not good at doing such a time-taking task. He rather likes to finish up with it as soon as possible and take his time to solve 3-SAT in polynomial time. Moreover, the teacher has given some advice that Shapur has to follow. Here's what the teacher said:
* As I expect you know, the strings I gave to my students (including you) contained only lowercase and uppercase Persian Mikhi-Script letters. These letters are too much like Latin letters, so to make your task much harder I converted all the initial strings and all of the students' answers to Latin.
* As latin alphabet has much less characters than Mikhi-Script, I added three odd-looking characters to the answers, these include "-", ";" and "_". These characters are my own invention of course! And I call them Signs.
* The length of all initial strings was less than or equal to 100 and the lengths of my students' answers are less than or equal to 600
* My son, not all students are genius as you are. It is quite possible that they make minor mistakes changing case of some characters. For example they may write ALiReZaAmIR instead of AlirezaAmir. Don't be picky and ignore these mistakes.
* Those signs which I previously talked to you about are not important. You can ignore them, since many students are in the mood for adding extra signs or forgetting about a sign. So something like Iran;;-- is the same as --;IRAN
* You should indicate for any of my students if his answer was right or wrong. Do this by writing "WA" for Wrong answer or "ACC" for a correct answer.
* I should remind you that none of the strings (initial strings or answers) are empty.
* Finally, do these as soon as possible. You have less than 2 hours to complete this.
Input
The first three lines contain a string each. These are the initial strings. They consists only of lowercase and uppercase Latin letters and signs ("-", ";" and "_"). All the initial strings have length from 1 to 100, inclusively.
In the fourth line there is a single integer n (0 ≤ n ≤ 1000), the number of students.
Next n lines contain a student's answer each. It is guaranteed that the answer meets what the teacher said. Each answer iconsists only of lowercase and uppercase Latin letters and signs ("-", ";" and "_"). Length is from 1 to 600, inclusively.
Output
For each student write in a different line. Print "WA" if his answer is wrong or "ACC" if his answer is OK.
Examples
Input
Iran_
Persian;
W_o;n;d;e;r;f;u;l;
7
WonderfulPersianIran
wonderful_PersIAN_IRAN;;_
WONDERFUL___IRAN__PERSIAN__;;
Ira__Persiann__Wonderful
Wonder;;fulPersian___;I;r;a;n;
__________IranPersianWonderful__________
PersianIran_is_Wonderful
Output
ACC
ACC
ACC
WA
ACC
ACC
WA
Input
Shapur;;
is___
a_genius
3
Shapur__a_is___geniUs
is___shapur___a__Genius;
Shapur;;is;;a;;geni;;us;;
Output
WA
ACC
ACC
Tags: strings
Correct Solution:
```
import re
lib = []
#clean sign trong lib, lower
for i in range(3):
temp = input()
temp = re.sub('[\\_\\-\\;]', '', temp)
lib.append(temp.lower())
answers = int(input())
#thisis; if remove is before it will remove 'is' in this
lib = sorted(lib,key=len,reverse=True)
for i in range(answers):
#preprocess sign cua answer
answer = re.sub('[\\_\\-\\;]', '', input())
answer = answer.lower()
for ele in lib:
temp = answer.find(ele)
if temp == -1:
break
else:
answer = answer.replace(ele,' ',1)#xoa nhung khong dc de trong
if answer.isspace():
print('ACC')
else:
print('WA')
```
| 48,373
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
The ship crashed into a reef and is sinking. Now the entire crew must be evacuated. All n crew members have already lined up in a row (for convenience let's label them all from left to right with positive integers from 1 to n) and await further instructions. However, one should evacuate the crew properly, in a strict order. Specifically:
The first crew members to leave the ship are rats. Then women and children (both groups have the same priority) leave the ship. After that all men are evacuated from the ship. The captain leaves the sinking ship last.
If we cannot determine exactly who should leave the ship first for any two members of the crew by the rules from the previous paragraph, then the one who stands to the left in the line leaves the ship first (or in other words, the one whose number in the line is less).
For each crew member we know his status as a crew member, and also his name. All crew members have different names. Determine the order in which to evacuate the crew.
Input
The first line contains an integer n, which is the number of people in the crew (1 ≤ n ≤ 100). Then follow n lines. The i-th of those lines contains two words — the name of the crew member who is i-th in line, and his status on the ship. The words are separated by exactly one space. There are no other spaces in the line. The names consist of Latin letters, the first letter is uppercase, the rest are lowercase. The length of any name is from 1 to 10 characters. The status can have the following values: rat for a rat, woman for a woman, child for a child, man for a man, captain for the captain. The crew contains exactly one captain.
Output
Print n lines. The i-th of them should contain the name of the crew member who must be the i-th one to leave the ship.
Examples
Input
6
Jack captain
Alice woman
Charlie man
Teddy rat
Bob child
Julia woman
Output
Teddy
Alice
Bob
Julia
Charlie
Jack
Tags: implementation, sortings, strings
Correct Solution:
```
n = int(input())
man = []
womanchildren = []
captain = []
for i in range(n):
n, r = map(str, input().split())
if r == 'rat':
print(n)
elif r == 'man':
man.append(n)
elif r == 'woman' or r == 'child':
womanchildren.append(n)
elif r == 'captain':
captain.append(n)
for i in womanchildren:
print(i)
for i in man:
print(i)
for i in captain:
print(i)
```
| 48,382
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
The ship crashed into a reef and is sinking. Now the entire crew must be evacuated. All n crew members have already lined up in a row (for convenience let's label them all from left to right with positive integers from 1 to n) and await further instructions. However, one should evacuate the crew properly, in a strict order. Specifically:
The first crew members to leave the ship are rats. Then women and children (both groups have the same priority) leave the ship. After that all men are evacuated from the ship. The captain leaves the sinking ship last.
If we cannot determine exactly who should leave the ship first for any two members of the crew by the rules from the previous paragraph, then the one who stands to the left in the line leaves the ship first (or in other words, the one whose number in the line is less).
For each crew member we know his status as a crew member, and also his name. All crew members have different names. Determine the order in which to evacuate the crew.
Input
The first line contains an integer n, which is the number of people in the crew (1 ≤ n ≤ 100). Then follow n lines. The i-th of those lines contains two words — the name of the crew member who is i-th in line, and his status on the ship. The words are separated by exactly one space. There are no other spaces in the line. The names consist of Latin letters, the first letter is uppercase, the rest are lowercase. The length of any name is from 1 to 10 characters. The status can have the following values: rat for a rat, woman for a woman, child for a child, man for a man, captain for the captain. The crew contains exactly one captain.
Output
Print n lines. The i-th of them should contain the name of the crew member who must be the i-th one to leave the ship.
Examples
Input
6
Jack captain
Alice woman
Charlie man
Teddy rat
Bob child
Julia woman
Output
Teddy
Alice
Bob
Julia
Charlie
Jack
Tags: implementation, sortings, strings
Correct Solution:
```
crew_members = [input().split() for _ in range(int(input()))]
for status_values in ('rat', ('woman', 'child'), 'man', 'captain'):
for name, status in crew_members:
if status in status_values:
print(name)
```
| 48,383
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
The ship crashed into a reef and is sinking. Now the entire crew must be evacuated. All n crew members have already lined up in a row (for convenience let's label them all from left to right with positive integers from 1 to n) and await further instructions. However, one should evacuate the crew properly, in a strict order. Specifically:
The first crew members to leave the ship are rats. Then women and children (both groups have the same priority) leave the ship. After that all men are evacuated from the ship. The captain leaves the sinking ship last.
If we cannot determine exactly who should leave the ship first for any two members of the crew by the rules from the previous paragraph, then the one who stands to the left in the line leaves the ship first (or in other words, the one whose number in the line is less).
For each crew member we know his status as a crew member, and also his name. All crew members have different names. Determine the order in which to evacuate the crew.
Input
The first line contains an integer n, which is the number of people in the crew (1 ≤ n ≤ 100). Then follow n lines. The i-th of those lines contains two words — the name of the crew member who is i-th in line, and his status on the ship. The words are separated by exactly one space. There are no other spaces in the line. The names consist of Latin letters, the first letter is uppercase, the rest are lowercase. The length of any name is from 1 to 10 characters. The status can have the following values: rat for a rat, woman for a woman, child for a child, man for a man, captain for the captain. The crew contains exactly one captain.
Output
Print n lines. The i-th of them should contain the name of the crew member who must be the i-th one to leave the ship.
Examples
Input
6
Jack captain
Alice woman
Charlie man
Teddy rat
Bob child
Julia woman
Output
Teddy
Alice
Bob
Julia
Charlie
Jack
Tags: implementation, sortings, strings
Correct Solution:
```
import sys
def main():
crew = {
'rat' : [],
'woman_child' : [],
'man' : [],
'captain' : []
}
x = input.readline()
n = int(x)
for i in range(n):
member = input.readline()
name = member.split(' ')[0]
status = member[:-1].split(' ')[1]
if status in crew:
crew[status].append(name)
else:
crew['woman_child'].append(name)
for rat in crew['rat']:
output.write(rat + '\n')
for woman_child in crew['woman_child']:
output.write(woman_child + '\n')
for man in crew['man']:
output.write(man + '\n')
output.write(crew['captain'][0])
def run():
global input, output
input = sys.stdin
output = sys.stdout
main()
if __name__ == '__main__':
run()
```
| 48,384
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
The ship crashed into a reef and is sinking. Now the entire crew must be evacuated. All n crew members have already lined up in a row (for convenience let's label them all from left to right with positive integers from 1 to n) and await further instructions. However, one should evacuate the crew properly, in a strict order. Specifically:
The first crew members to leave the ship are rats. Then women and children (both groups have the same priority) leave the ship. After that all men are evacuated from the ship. The captain leaves the sinking ship last.
If we cannot determine exactly who should leave the ship first for any two members of the crew by the rules from the previous paragraph, then the one who stands to the left in the line leaves the ship first (or in other words, the one whose number in the line is less).
For each crew member we know his status as a crew member, and also his name. All crew members have different names. Determine the order in which to evacuate the crew.
Input
The first line contains an integer n, which is the number of people in the crew (1 ≤ n ≤ 100). Then follow n lines. The i-th of those lines contains two words — the name of the crew member who is i-th in line, and his status on the ship. The words are separated by exactly one space. There are no other spaces in the line. The names consist of Latin letters, the first letter is uppercase, the rest are lowercase. The length of any name is from 1 to 10 characters. The status can have the following values: rat for a rat, woman for a woman, child for a child, man for a man, captain for the captain. The crew contains exactly one captain.
Output
Print n lines. The i-th of them should contain the name of the crew member who must be the i-th one to leave the ship.
Examples
Input
6
Jack captain
Alice woman
Charlie man
Teddy rat
Bob child
Julia woman
Output
Teddy
Alice
Bob
Julia
Charlie
Jack
Tags: implementation, sortings, strings
Correct Solution:
```
def sinkingship(alist):
rat,womanchild,man,captain=[],[],[],[]
# rat woman & child man captain
for i in alist:
if i[1]=="rat":
rat.append(i[0])
if i[1]=="woman" or i[1]=="child":
womanchild.append(i[0])
if i[1]=="man" :
man.append(i[0])
if i[1]=="captain" :
captain.append(i[0])
totallist=rat+womanchild+man+captain
#print(totallist)
for i in totallist:
print(i)
n=int(input())
alist=[]
for i in range(n):
name=list(map(str,input().split()))
alist.append(name)
sinkingship(alist)
```
| 48,386
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
The ship crashed into a reef and is sinking. Now the entire crew must be evacuated. All n crew members have already lined up in a row (for convenience let's label them all from left to right with positive integers from 1 to n) and await further instructions. However, one should evacuate the crew properly, in a strict order. Specifically:
The first crew members to leave the ship are rats. Then women and children (both groups have the same priority) leave the ship. After that all men are evacuated from the ship. The captain leaves the sinking ship last.
If we cannot determine exactly who should leave the ship first for any two members of the crew by the rules from the previous paragraph, then the one who stands to the left in the line leaves the ship first (or in other words, the one whose number in the line is less).
For each crew member we know his status as a crew member, and also his name. All crew members have different names. Determine the order in which to evacuate the crew.
Input
The first line contains an integer n, which is the number of people in the crew (1 ≤ n ≤ 100). Then follow n lines. The i-th of those lines contains two words — the name of the crew member who is i-th in line, and his status on the ship. The words are separated by exactly one space. There are no other spaces in the line. The names consist of Latin letters, the first letter is uppercase, the rest are lowercase. The length of any name is from 1 to 10 characters. The status can have the following values: rat for a rat, woman for a woman, child for a child, man for a man, captain for the captain. The crew contains exactly one captain.
Output
Print n lines. The i-th of them should contain the name of the crew member who must be the i-th one to leave the ship.
Examples
Input
6
Jack captain
Alice woman
Charlie man
Teddy rat
Bob child
Julia woman
Output
Teddy
Alice
Bob
Julia
Charlie
Jack
Tags: implementation, sortings, strings
Correct Solution:
```
def main():
def clear(t):
nonlocal n, q
for i in range(n):
if q[i] == None:
continue
if q[i][1] in t:
print(q[i][0])
q[i] = None
n = int(input())
q = []
for i in range(n):
q.append(input().split(' '))
clear(set(["rat"]))
clear(set(["woman", "child"]))
clear(set(["man"]))
clear(set(["captain"]))
main()
```
| 48,387
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
The ship crashed into a reef and is sinking. Now the entire crew must be evacuated. All n crew members have already lined up in a row (for convenience let's label them all from left to right with positive integers from 1 to n) and await further instructions. However, one should evacuate the crew properly, in a strict order. Specifically:
The first crew members to leave the ship are rats. Then women and children (both groups have the same priority) leave the ship. After that all men are evacuated from the ship. The captain leaves the sinking ship last.
If we cannot determine exactly who should leave the ship first for any two members of the crew by the rules from the previous paragraph, then the one who stands to the left in the line leaves the ship first (or in other words, the one whose number in the line is less).
For each crew member we know his status as a crew member, and also his name. All crew members have different names. Determine the order in which to evacuate the crew.
Input
The first line contains an integer n, which is the number of people in the crew (1 ≤ n ≤ 100). Then follow n lines. The i-th of those lines contains two words — the name of the crew member who is i-th in line, and his status on the ship. The words are separated by exactly one space. There are no other spaces in the line. The names consist of Latin letters, the first letter is uppercase, the rest are lowercase. The length of any name is from 1 to 10 characters. The status can have the following values: rat for a rat, woman for a woman, child for a child, man for a man, captain for the captain. The crew contains exactly one captain.
Output
Print n lines. The i-th of them should contain the name of the crew member who must be the i-th one to leave the ship.
Examples
Input
6
Jack captain
Alice woman
Charlie man
Teddy rat
Bob child
Julia woman
Output
Teddy
Alice
Bob
Julia
Charlie
Jack
Tags: implementation, sortings, strings
Correct Solution:
```
from operator import itemgetter
peoplenum = int(input())
list = []
peopleorder = []
supposedorder = {"rat":1, "woman":2, "child":2, "man":3, "captain":4}
order = []
for i in range(peoplenum):
list.append(input().split())
for i in range(peoplenum):
if list[i][1] == 'rat':
order.append([supposedorder["rat"], list[i][0]])
if list[i][1] == 'woman':
order.append([supposedorder['woman'], list[i][0]])
if list[i][1] == 'child':
order.append([supposedorder['child'], list[i][0]])
if list[i][1] == 'man':
order.append([supposedorder['man'], list[i][0]])
if list[i][1] == 'captain':
order.append([supposedorder['captain'], list[i][0]])
order = sorted(order, key=itemgetter(0))
for i in range(peoplenum):
print(order[i][1])
```
| 48,388
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
The ship crashed into a reef and is sinking. Now the entire crew must be evacuated. All n crew members have already lined up in a row (for convenience let's label them all from left to right with positive integers from 1 to n) and await further instructions. However, one should evacuate the crew properly, in a strict order. Specifically:
The first crew members to leave the ship are rats. Then women and children (both groups have the same priority) leave the ship. After that all men are evacuated from the ship. The captain leaves the sinking ship last.
If we cannot determine exactly who should leave the ship first for any two members of the crew by the rules from the previous paragraph, then the one who stands to the left in the line leaves the ship first (or in other words, the one whose number in the line is less).
For each crew member we know his status as a crew member, and also his name. All crew members have different names. Determine the order in which to evacuate the crew.
Input
The first line contains an integer n, which is the number of people in the crew (1 ≤ n ≤ 100). Then follow n lines. The i-th of those lines contains two words — the name of the crew member who is i-th in line, and his status on the ship. The words are separated by exactly one space. There are no other spaces in the line. The names consist of Latin letters, the first letter is uppercase, the rest are lowercase. The length of any name is from 1 to 10 characters. The status can have the following values: rat for a rat, woman for a woman, child for a child, man for a man, captain for the captain. The crew contains exactly one captain.
Output
Print n lines. The i-th of them should contain the name of the crew member who must be the i-th one to leave the ship.
Examples
Input
6
Jack captain
Alice woman
Charlie man
Teddy rat
Bob child
Julia woman
Output
Teddy
Alice
Bob
Julia
Charlie
Jack
Tags: implementation, sortings, strings
Correct Solution:
```
n = int(input())
arr = []
d = {"rat":1,"woman":2,"child":2,"man":3,"captain":5}
for i in range(n):
arr.append(tuple(input().split()))
arr.sort(key = lambda x:d[x[1]])
for data in arr:
print(data[0])
```
| 48,389
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's consider one interesting word game. In this game you should transform one word into another through special operations.
Let's say we have word w, let's split this word into two non-empty parts x and y so, that w = xy. A split operation is transforming word w = xy into word u = yx. For example, a split operation can transform word "wordcut" into word "cutword".
You are given two words start and end. Count in how many ways we can transform word start into word end, if we apply exactly k split operations consecutively to word start.
Two ways are considered different if the sequences of applied operations differ. Two operation sequences are different if exists such number i (1 ≤ i ≤ k), that in the i-th operation of the first sequence the word splits into parts x and y, in the i-th operation of the second sequence the word splits into parts a and b, and additionally x ≠ a holds.
Input
The first line contains a non-empty word start, the second line contains a non-empty word end. The words consist of lowercase Latin letters. The number of letters in word start equals the number of letters in word end and is at least 2 and doesn't exceed 1000 letters.
The third line contains integer k (0 ≤ k ≤ 105) — the required number of operations.
Output
Print a single number — the answer to the problem. As this number can be rather large, print it modulo 1000000007 (109 + 7).
Examples
Input
ab
ab
2
Output
1
Input
ababab
ababab
1
Output
2
Input
ab
ba
2
Output
0
Note
The sought way in the first sample is:
ab → a|b → ba → b|a → ab
In the second sample the two sought ways are:
* ababab → abab|ab → ababab
* ababab → ab|abab → ababab
Tags: dp
Correct Solution:
```
MOD = int(1e9) + 7
if __name__ == "__main__":
a = input()
b = input()
k = int(input())
if(len(a) != len(b)):
print(0)
exit()
a = a + a
x = 0
y = 0
for i in range(len(a) // 2):
flag = 1
for j in range(len(b)):
if(a[j + i] != b[j]):
flag = 0
break
if(flag == 1):
x += 1
else:
y += 1
flag = 0
for i in range(len(b)):
if(a[i] != b[i]):
flag = 1
u = 1
v = 0
if(flag == 1):
v = 1
u = 0
for i in range(k):
uu = (u * (x - 1)) % MOD + (v * (x)) % MOD
vv = (u * (y)) % MOD + (v * (y - 1)) % MOD
u = uu % MOD
v = vv % MOD
print(u)
```
| 49,927
|
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1.0244140625,
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's consider one interesting word game. In this game you should transform one word into another through special operations.
Let's say we have word w, let's split this word into two non-empty parts x and y so, that w = xy. A split operation is transforming word w = xy into word u = yx. For example, a split operation can transform word "wordcut" into word "cutword".
You are given two words start and end. Count in how many ways we can transform word start into word end, if we apply exactly k split operations consecutively to word start.
Two ways are considered different if the sequences of applied operations differ. Two operation sequences are different if exists such number i (1 ≤ i ≤ k), that in the i-th operation of the first sequence the word splits into parts x and y, in the i-th operation of the second sequence the word splits into parts a and b, and additionally x ≠ a holds.
Input
The first line contains a non-empty word start, the second line contains a non-empty word end. The words consist of lowercase Latin letters. The number of letters in word start equals the number of letters in word end and is at least 2 and doesn't exceed 1000 letters.
The third line contains integer k (0 ≤ k ≤ 105) — the required number of operations.
Output
Print a single number — the answer to the problem. As this number can be rather large, print it modulo 1000000007 (109 + 7).
Examples
Input
ab
ab
2
Output
1
Input
ababab
ababab
1
Output
2
Input
ab
ba
2
Output
0
Note
The sought way in the first sample is:
ab → a|b → ba → b|a → ab
In the second sample the two sought ways are:
* ababab → abab|ab → ababab
* ababab → ab|abab → ababab
Tags: dp
Correct Solution:
```
start,end,k=input(),input(),int(input())
n,mod=len(end),10**9+7
dp=[1,0]
psum=1
for i in range(k):
dp[0]=psum-dp[0]
dp[1]=psum-dp[1]
psum=(dp[0]+((n-1)*dp[1])%mod)%mod
ans=0
for i in range(n):
if start[i:]+start[:i]==end:
if i==0:ans+=dp[0]
else:ans+=dp[1]
print(ans%mod)
```
| 49,928
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's consider one interesting word game. In this game you should transform one word into another through special operations.
Let's say we have word w, let's split this word into two non-empty parts x and y so, that w = xy. A split operation is transforming word w = xy into word u = yx. For example, a split operation can transform word "wordcut" into word "cutword".
You are given two words start and end. Count in how many ways we can transform word start into word end, if we apply exactly k split operations consecutively to word start.
Two ways are considered different if the sequences of applied operations differ. Two operation sequences are different if exists such number i (1 ≤ i ≤ k), that in the i-th operation of the first sequence the word splits into parts x and y, in the i-th operation of the second sequence the word splits into parts a and b, and additionally x ≠ a holds.
Input
The first line contains a non-empty word start, the second line contains a non-empty word end. The words consist of lowercase Latin letters. The number of letters in word start equals the number of letters in word end and is at least 2 and doesn't exceed 1000 letters.
The third line contains integer k (0 ≤ k ≤ 105) — the required number of operations.
Output
Print a single number — the answer to the problem. As this number can be rather large, print it modulo 1000000007 (109 + 7).
Examples
Input
ab
ab
2
Output
1
Input
ababab
ababab
1
Output
2
Input
ab
ba
2
Output
0
Note
The sought way in the first sample is:
ab → a|b → ba → b|a → ab
In the second sample the two sought ways are:
* ababab → abab|ab → ababab
* ababab → ab|abab → ababab
Tags: dp
Correct Solution:
```
start, end, k = input(), input(), int(input())
dp = [[start == end for _ in range(k + 1)], [start != end for _ in range(k + 1)]]
mod = int(1e9 + 7)
same = sum(end == (start[i: len(start)] + start[0: i]) for i in range(len(start)))
diff = len(start) - same
for i in range(1, k + 1):
dp[0][i] = (dp[0][i - 1] * (same - 1) + dp[1][i - 1] * same) % mod
dp[1][i] = (dp[0][i - 1] * diff + dp[1][i - 1] * (diff - 1)) % mod
print(int(dp[0][k]))
```
| 49,929
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's consider one interesting word game. In this game you should transform one word into another through special operations.
Let's say we have word w, let's split this word into two non-empty parts x and y so, that w = xy. A split operation is transforming word w = xy into word u = yx. For example, a split operation can transform word "wordcut" into word "cutword".
You are given two words start and end. Count in how many ways we can transform word start into word end, if we apply exactly k split operations consecutively to word start.
Two ways are considered different if the sequences of applied operations differ. Two operation sequences are different if exists such number i (1 ≤ i ≤ k), that in the i-th operation of the first sequence the word splits into parts x and y, in the i-th operation of the second sequence the word splits into parts a and b, and additionally x ≠ a holds.
Input
The first line contains a non-empty word start, the second line contains a non-empty word end. The words consist of lowercase Latin letters. The number of letters in word start equals the number of letters in word end and is at least 2 and doesn't exceed 1000 letters.
The third line contains integer k (0 ≤ k ≤ 105) — the required number of operations.
Output
Print a single number — the answer to the problem. As this number can be rather large, print it modulo 1000000007 (109 + 7).
Examples
Input
ab
ab
2
Output
1
Input
ababab
ababab
1
Output
2
Input
ab
ba
2
Output
0
Note
The sought way in the first sample is:
ab → a|b → ba → b|a → ab
In the second sample the two sought ways are:
* ababab → abab|ab → ababab
* ababab → ab|abab → ababab
Tags: dp
Correct Solution:
```
class Solution():
def number_or_ways(start, end, moves):
p = 10**9+7
num_rots = 0
for i in range(len(start)):
rot = start[i:]+start[0:i]
if rot == end:
num_rots += 1
dp = [[0 for i in range(2)] for j in range(moves+1)]
dp[0][0], dp[0][1] = 1, 0
for i in range(1, moves+1):
dp[i][0] = (((num_rots-1)*dp[i-1][0])%p + ((len(start)-num_rots)*dp[i-1][1])%p)%p
dp[i][1] = ((num_rots*dp[i-1][0])%p + ((len(start)-1-num_rots)*dp[i-1][1])%p)%p
if start == end:
return dp[moves][0]
else:
return dp[moves][1]
start = input().strip()
end = input().strip()
moves = int(input())
print(Solution.number_or_ways(start, end, moves))
```
| 49,930
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's consider one interesting word game. In this game you should transform one word into another through special operations.
Let's say we have word w, let's split this word into two non-empty parts x and y so, that w = xy. A split operation is transforming word w = xy into word u = yx. For example, a split operation can transform word "wordcut" into word "cutword".
You are given two words start and end. Count in how many ways we can transform word start into word end, if we apply exactly k split operations consecutively to word start.
Two ways are considered different if the sequences of applied operations differ. Two operation sequences are different if exists such number i (1 ≤ i ≤ k), that in the i-th operation of the first sequence the word splits into parts x and y, in the i-th operation of the second sequence the word splits into parts a and b, and additionally x ≠ a holds.
Input
The first line contains a non-empty word start, the second line contains a non-empty word end. The words consist of lowercase Latin letters. The number of letters in word start equals the number of letters in word end and is at least 2 and doesn't exceed 1000 letters.
The third line contains integer k (0 ≤ k ≤ 105) — the required number of operations.
Output
Print a single number — the answer to the problem. As this number can be rather large, print it modulo 1000000007 (109 + 7).
Examples
Input
ab
ab
2
Output
1
Input
ababab
ababab
1
Output
2
Input
ab
ba
2
Output
0
Note
The sought way in the first sample is:
ab → a|b → ba → b|a → ab
In the second sample the two sought ways are:
* ababab → abab|ab → ababab
* ababab → ab|abab → ababab
Tags: dp
Correct Solution:
```
# ------------------- fast io --------------------
import os
import sys
from io import BytesIO, IOBase
BUFSIZE = 8192
class FastIO(IOBase):
newlines = 0
def __init__(self, file):
self._fd = file.fileno()
self.buffer = BytesIO()
self.writable = "x" in file.mode or "r" not in file.mode
self.write = self.buffer.write if self.writable else None
def read(self):
while True:
b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
if not b:
break
ptr = self.buffer.tell()
self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
self.newlines = 0
return self.buffer.read()
def readline(self):
while self.newlines == 0:
b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
self.newlines = b.count(b"\n") + (not b)
ptr = self.buffer.tell()
self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
self.newlines -= 1
return self.buffer.readline()
def flush(self):
if self.writable:
os.write(self._fd, self.buffer.getvalue())
self.buffer.truncate(0), self.buffer.seek(0)
class IOWrapper(IOBase):
def __init__(self, file):
self.buffer = FastIO(file)
self.flush = self.buffer.flush
self.writable = self.buffer.writable
self.write = lambda s: self.buffer.write(s.encode("ascii"))
self.read = lambda: self.buffer.read().decode("ascii")
self.readline = lambda: self.buffer.readline().decode("ascii")
sys.stdin, sys.stdout = IOWrapper(sys.stdin), IOWrapper(sys.stdout)
input = lambda: sys.stdin.readline().rstrip("\r\n")
# ------------------- fast io --------------------
from math import gcd, ceil
def prod(a, mod=10**9+7):
ans = 1
for each in a:
ans = (ans * each) % mod
return ans
def lcm(a, b): return a * b // gcd(a, b)
def binary(x, length=16):
y = bin(x)[2:]
return y if len(y) >= length else "0" * (length - len(y)) + y
from collections import deque
for _ in range(int(input()) if not True else 1):
#n = int(input())
#n, k = map(int, input().split())
#a, b = map(int, input().split())
#c, d = map(int, input().split())
#a = list(map(int, input().split()))
#b = list(map(int, input().split()))
s1 = deque(k for k in input())
s2 = deque(k for k in input())
n = len(s1)
k = int(input())
if k == 0:
print(int(s1==s2))
quit()
mod = 10**9 + 7
n1pow = [1]
for i in range(696969):
n1pow += [(n1pow[-1]*(n-1)) % mod]
ans0 = 0
for i in range(1, k):
ans0 = (n1pow[i] - ans0) % mod
ans1 = 1
for i in range(1, k):
ans1 = (n1pow[i] - ans1) % mod
#print(ans0, ans1)
total = 0
for t in range(n):
if s1 == s2:
total += ans1 if t else ans0
s1.appendleft(s1.pop())
print(total % mod)
```
| 49,931
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's consider one interesting word game. In this game you should transform one word into another through special operations.
Let's say we have word w, let's split this word into two non-empty parts x and y so, that w = xy. A split operation is transforming word w = xy into word u = yx. For example, a split operation can transform word "wordcut" into word "cutword".
You are given two words start and end. Count in how many ways we can transform word start into word end, if we apply exactly k split operations consecutively to word start.
Two ways are considered different if the sequences of applied operations differ. Two operation sequences are different if exists such number i (1 ≤ i ≤ k), that in the i-th operation of the first sequence the word splits into parts x and y, in the i-th operation of the second sequence the word splits into parts a and b, and additionally x ≠ a holds.
Input
The first line contains a non-empty word start, the second line contains a non-empty word end. The words consist of lowercase Latin letters. The number of letters in word start equals the number of letters in word end and is at least 2 and doesn't exceed 1000 letters.
The third line contains integer k (0 ≤ k ≤ 105) — the required number of operations.
Output
Print a single number — the answer to the problem. As this number can be rather large, print it modulo 1000000007 (109 + 7).
Examples
Input
ab
ab
2
Output
1
Input
ababab
ababab
1
Output
2
Input
ab
ba
2
Output
0
Note
The sought way in the first sample is:
ab → a|b → ba → b|a → ab
In the second sample the two sought ways are:
* ababab → abab|ab → ababab
* ababab → ab|abab → ababab
Tags: dp
Correct Solution:
```
# ========= /\ /| |====/|
# | / \ | | / |
# | /____\ | | / |
# | / \ | | / |
# ========= / \ ===== |/====|
# code
def main():
MOD = int(1e9 + 7)
a = input()
b = input()
n = int(input())
ca, cb = 0,0
for i in range(len(a)):
s = a[i:] + a[:i]
if s == b:
ca += 1
else:
cb += 1
if ca == 0:
print(0)
return
da = [0] * (n + 1)
db = da[:]
da[0] = 1 if a == b else 0
db[0] = 1 - da[0]
for i in range(1, n + 1):
da[i] = da[i - 1] * (ca - 1) + db[i - 1] * ca
db[i] = da[i - 1] * cb + db[i - 1] * (cb - 1)
da[i] %= MOD
db[i] %= MOD
# print(da[i], db[i], ca, cb)
print(da[n])
return
if __name__ == "__main__":
main()
```
| 49,932
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's consider one interesting word game. In this game you should transform one word into another through special operations.
Let's say we have word w, let's split this word into two non-empty parts x and y so, that w = xy. A split operation is transforming word w = xy into word u = yx. For example, a split operation can transform word "wordcut" into word "cutword".
You are given two words start and end. Count in how many ways we can transform word start into word end, if we apply exactly k split operations consecutively to word start.
Two ways are considered different if the sequences of applied operations differ. Two operation sequences are different if exists such number i (1 ≤ i ≤ k), that in the i-th operation of the first sequence the word splits into parts x and y, in the i-th operation of the second sequence the word splits into parts a and b, and additionally x ≠ a holds.
Input
The first line contains a non-empty word start, the second line contains a non-empty word end. The words consist of lowercase Latin letters. The number of letters in word start equals the number of letters in word end and is at least 2 and doesn't exceed 1000 letters.
The third line contains integer k (0 ≤ k ≤ 105) — the required number of operations.
Output
Print a single number — the answer to the problem. As this number can be rather large, print it modulo 1000000007 (109 + 7).
Examples
Input
ab
ab
2
Output
1
Input
ababab
ababab
1
Output
2
Input
ab
ba
2
Output
0
Note
The sought way in the first sample is:
ab → a|b → ba → b|a → ab
In the second sample the two sought ways are:
* ababab → abab|ab → ababab
* ababab → ab|abab → ababab
Tags: dp
Correct Solution:
```
def WordCut():
start = input()
end = input()
k = int(input())
n=len(start)
dpA,dpB = (start==end),(start!=end)
end+=end
A=sum(start==end[i:i+n] for i in range(n))
B = n- A
M = 10**9+7
for _ in range(k):
dpA,dpB=(dpA*(A-1)+dpB*A)%M,(dpA*B+dpB*(B-1))%M
return int(dpA)
print(WordCut())
```
| 49,933
|
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] | 6
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's consider one interesting word game. In this game you should transform one word into another through special operations.
Let's say we have word w, let's split this word into two non-empty parts x and y so, that w = xy. A split operation is transforming word w = xy into word u = yx. For example, a split operation can transform word "wordcut" into word "cutword".
You are given two words start and end. Count in how many ways we can transform word start into word end, if we apply exactly k split operations consecutively to word start.
Two ways are considered different if the sequences of applied operations differ. Two operation sequences are different if exists such number i (1 ≤ i ≤ k), that in the i-th operation of the first sequence the word splits into parts x and y, in the i-th operation of the second sequence the word splits into parts a and b, and additionally x ≠ a holds.
Input
The first line contains a non-empty word start, the second line contains a non-empty word end. The words consist of lowercase Latin letters. The number of letters in word start equals the number of letters in word end and is at least 2 and doesn't exceed 1000 letters.
The third line contains integer k (0 ≤ k ≤ 105) — the required number of operations.
Output
Print a single number — the answer to the problem. As this number can be rather large, print it modulo 1000000007 (109 + 7).
Examples
Input
ab
ab
2
Output
1
Input
ababab
ababab
1
Output
2
Input
ab
ba
2
Output
0
Note
The sought way in the first sample is:
ab → a|b → ba → b|a → ab
In the second sample the two sought ways are:
* ababab → abab|ab → ababab
* ababab → ab|abab → ababab
Submitted Solution:
```
# ------------------- fast io --------------------
import os
import sys
from io import BytesIO, IOBase
BUFSIZE = 8192
class FastIO(IOBase):
newlines = 0
def __init__(self, file):
self._fd = file.fileno()
self.buffer = BytesIO()
self.writable = "x" in file.mode or "r" not in file.mode
self.write = self.buffer.write if self.writable else None
def read(self):
while True:
b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
if not b:
break
ptr = self.buffer.tell()
self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
self.newlines = 0
return self.buffer.read()
def readline(self):
while self.newlines == 0:
b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
self.newlines = b.count(b"\n") + (not b)
ptr = self.buffer.tell()
self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
self.newlines -= 1
return self.buffer.readline()
def flush(self):
if self.writable:
os.write(self._fd, self.buffer.getvalue())
self.buffer.truncate(0), self.buffer.seek(0)
class IOWrapper(IOBase):
def __init__(self, file):
self.buffer = FastIO(file)
self.flush = self.buffer.flush
self.writable = self.buffer.writable
self.write = lambda s: self.buffer.write(s.encode("ascii"))
self.read = lambda: self.buffer.read().decode("ascii")
self.readline = lambda: self.buffer.readline().decode("ascii")
sys.stdin, sys.stdout = IOWrapper(sys.stdin), IOWrapper(sys.stdout)
input = lambda: sys.stdin.readline().rstrip("\r\n")
# ------------------- fast io --------------------
from math import gcd, ceil
def prod(a, mod=10**9+7):
ans = 1
for each in a:
ans = (ans * each) % mod
return ans
def lcm(a, b): return a * b // gcd(a, b)
def binary(x, length=16):
y = bin(x)[2:]
return y if len(y) >= length else "0" * (length - len(y)) + y
from collections import deque
for _ in range(int(input()) if not True else 1):
#n = int(input())
#n, k = map(int, input().split())
#a, b = map(int, input().split())
#c, d = map(int, input().split())
#a = list(map(int, input().split()))
#b = list(map(int, input().split()))
s1 = deque(k for k in input())
s2 = deque(k for k in input())
n = len(s1)
k = int(input())
if k == 0:
print(int(s1==s2))
quit()
mod = 10**9 + 7
n1pow = [1]
for i in range(696969):
n1pow += [(n1pow[-1]*(n-1)) % mod]
ans0 = 0
for i in range(2, k+1):
ans0 = (n1pow[i] - ans0) % mod
ans1 = 1
for i in range(2, k+1):
ans1 = (n1pow[i] - ans1) % mod
#print(ans0, ans1)
total = 0
for t in range(n):
if s1 == s2:
total += ans1 if t else ans0
s1.appendleft(s1.pop())
print(total % mod)
```
No
| 49,934
|
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] | 6
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's consider one interesting word game. In this game you should transform one word into another through special operations.
Let's say we have word w, let's split this word into two non-empty parts x and y so, that w = xy. A split operation is transforming word w = xy into word u = yx. For example, a split operation can transform word "wordcut" into word "cutword".
You are given two words start and end. Count in how many ways we can transform word start into word end, if we apply exactly k split operations consecutively to word start.
Two ways are considered different if the sequences of applied operations differ. Two operation sequences are different if exists such number i (1 ≤ i ≤ k), that in the i-th operation of the first sequence the word splits into parts x and y, in the i-th operation of the second sequence the word splits into parts a and b, and additionally x ≠ a holds.
Input
The first line contains a non-empty word start, the second line contains a non-empty word end. The words consist of lowercase Latin letters. The number of letters in word start equals the number of letters in word end and is at least 2 and doesn't exceed 1000 letters.
The third line contains integer k (0 ≤ k ≤ 105) — the required number of operations.
Output
Print a single number — the answer to the problem. As this number can be rather large, print it modulo 1000000007 (109 + 7).
Examples
Input
ab
ab
2
Output
1
Input
ababab
ababab
1
Output
2
Input
ab
ba
2
Output
0
Note
The sought way in the first sample is:
ab → a|b → ba → b|a → ab
In the second sample the two sought ways are:
* ababab → abab|ab → ababab
* ababab → ab|abab → ababab
Submitted Solution:
```
# ========= /\ /| |====/|
# | / \ | | / |
# | /____\ | | / |
# | / \ | | / |
# ========= / \ ===== |/====|
# code
def main():
MOD = int(1e9 + 7)
a = input()
b = input()
n = int(input())
ca, cb = 0,0
for i in range(len(a)):
s = a[i:] + a[:i]
if s == b:
ca += 1
else:
cb += 1
if ca == 0:
print(0)
return
da = [0] * (n + 1)
db = da[:]
da[0] = 1 if a == b else 0
db[0] = 1 - da[0]
for i in range(1, n + 1):
da[i] = da[i - 1] * (ca - 1)
da[i] += db[i - 1] * cb
db[i] = da[i - 1] * ca
if cb:
db[i - 1] * (cb - 1)
da[i] %= MOD
db[i] %= MOD
print(da[n])
return
if __name__ == "__main__":
main()
```
No
| 49,935
|
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] | 6
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's consider one interesting word game. In this game you should transform one word into another through special operations.
Let's say we have word w, let's split this word into two non-empty parts x and y so, that w = xy. A split operation is transforming word w = xy into word u = yx. For example, a split operation can transform word "wordcut" into word "cutword".
You are given two words start and end. Count in how many ways we can transform word start into word end, if we apply exactly k split operations consecutively to word start.
Two ways are considered different if the sequences of applied operations differ. Two operation sequences are different if exists such number i (1 ≤ i ≤ k), that in the i-th operation of the first sequence the word splits into parts x and y, in the i-th operation of the second sequence the word splits into parts a and b, and additionally x ≠ a holds.
Input
The first line contains a non-empty word start, the second line contains a non-empty word end. The words consist of lowercase Latin letters. The number of letters in word start equals the number of letters in word end and is at least 2 and doesn't exceed 1000 letters.
The third line contains integer k (0 ≤ k ≤ 105) — the required number of operations.
Output
Print a single number — the answer to the problem. As this number can be rather large, print it modulo 1000000007 (109 + 7).
Examples
Input
ab
ab
2
Output
1
Input
ababab
ababab
1
Output
2
Input
ab
ba
2
Output
0
Note
The sought way in the first sample is:
ab → a|b → ba → b|a → ab
In the second sample the two sought ways are:
* ababab → abab|ab → ababab
* ababab → ab|abab → ababab
Submitted Solution:
```
# ========= /\ /| |====/|
# | / \ | | / |
# | /____\ | | / |
# | / \ | | / |
# ========= / \ ===== |/====|
# code
def main():
MOD = int(1e9 + 7)
a = input()
b = input()
n = int(input())
ca, cb = 0,0
for i in range(len(a)):
s = a[i:] + a[:i]
if s == b:
ca += 1
else:
cb += 1
da = [0] * (n + 1)
db = da[:]
da[0] = 1 if a == b else 0
db[0] = 1 - da[0]
for i in range(1, n + 1):
da[i] = da[i - 1] * (ca - 1) + db[i - 1] * cb
db[i] = da[i - 1] * ca + db[i - 1] * (cb - 1)
da[i] %= MOD
db[i] %= MOD
print(da[n])
return
if __name__ == "__main__":
main()
```
No
| 49,936
|
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] | 6
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's consider one interesting word game. In this game you should transform one word into another through special operations.
Let's say we have word w, let's split this word into two non-empty parts x and y so, that w = xy. A split operation is transforming word w = xy into word u = yx. For example, a split operation can transform word "wordcut" into word "cutword".
You are given two words start and end. Count in how many ways we can transform word start into word end, if we apply exactly k split operations consecutively to word start.
Two ways are considered different if the sequences of applied operations differ. Two operation sequences are different if exists such number i (1 ≤ i ≤ k), that in the i-th operation of the first sequence the word splits into parts x and y, in the i-th operation of the second sequence the word splits into parts a and b, and additionally x ≠ a holds.
Input
The first line contains a non-empty word start, the second line contains a non-empty word end. The words consist of lowercase Latin letters. The number of letters in word start equals the number of letters in word end and is at least 2 and doesn't exceed 1000 letters.
The third line contains integer k (0 ≤ k ≤ 105) — the required number of operations.
Output
Print a single number — the answer to the problem. As this number can be rather large, print it modulo 1000000007 (109 + 7).
Examples
Input
ab
ab
2
Output
1
Input
ababab
ababab
1
Output
2
Input
ab
ba
2
Output
0
Note
The sought way in the first sample is:
ab → a|b → ba → b|a → ab
In the second sample the two sought ways are:
* ababab → abab|ab → ababab
* ababab → ab|abab → ababab
Submitted Solution:
```
# ========= /\ /| |====/|
# | / \ | | / |
# | /____\ | | / |
# | / \ | | / |
# ========= / \ ===== |/====|
# code
def main():
MOD = int(1e9 + 7)
a = input()
b = input()
n = int(input())
ca, cb = 0,0
for i in range(len(a)):
s = a[i:] + a[:i]
if s == b:
ca += 1
else:
cb += 1
if ca == 0:
print(0)
return
da = [0] * (n + 1)
db = da[:]
da[0] = 1 if a == b else 0
db[0] = 1 - da[0]
for i in range(1, n + 1):
da[i] = da[i - 1] * (ca - 1) + db[i - 1] * cb
db[i] = da[i - 1] * ca + db[i - 1] * (cb - 1)
da[i] %= MOD
db[i] %= MOD
print(da[n])
return
if __name__ == "__main__":
main()
```
No
| 49,937
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
There are some websites that are accessible through several different addresses. For example, for a long time Codeforces was accessible with two hostnames codeforces.com and codeforces.ru.
You are given a list of page addresses being queried. For simplicity we consider all addresses to have the form http://<hostname>[/<path>], where:
* <hostname> — server name (consists of words and maybe some dots separating them),
* /<path> — optional part, where <path> consists of words separated by slashes.
We consider two <hostname> to correspond to one website if for each query to the first <hostname> there will be exactly the same query to the second one and vice versa — for each query to the second <hostname> there will be the same query to the first one. Take a look at the samples for further clarifications.
Your goal is to determine the groups of server names that correspond to one website. Ignore groups consisting of the only server name.
Please note, that according to the above definition queries http://<hostname> and http://<hostname>/ are different.
Input
The first line of the input contains a single integer n (1 ≤ n ≤ 100 000) — the number of page queries. Then follow n lines each containing exactly one address. Each address is of the form http://<hostname>[/<path>], where:
* <hostname> consists of lowercase English letters and dots, there are no two consecutive dots, <hostname> doesn't start or finish with a dot. The length of <hostname> is positive and doesn't exceed 20.
* <path> consists of lowercase English letters, dots and slashes. There are no two consecutive slashes, <path> doesn't start with a slash and its length doesn't exceed 20.
Addresses are not guaranteed to be distinct.
Output
First print k — the number of groups of server names that correspond to one website. You should count only groups of size greater than one.
Next k lines should contain the description of groups, one group per line. For each group print all server names separated by a single space. You are allowed to print both groups and names inside any group in arbitrary order.
Examples
Input
10
http://abacaba.ru/test
http://abacaba.ru/
http://abacaba.com
http://abacaba.com/test
http://abacaba.de/
http://abacaba.ru/test
http://abacaba.de/test
http://abacaba.com/
http://abacaba.com/t
http://abacaba.com/test
Output
1
http://abacaba.de http://abacaba.ru
Input
14
http://c
http://ccc.bbbb/aba..b
http://cba.com
http://a.c/aba..b/a
http://abc/
http://a.c/
http://ccc.bbbb
http://ab.ac.bc.aa/
http://a.a.a/
http://ccc.bbbb/
http://cba.com/
http://cba.com/aba..b
http://a.a.a/aba..b/a
http://abc/aba..b/a
Output
2
http://cba.com http://ccc.bbbb
http://a.a.a http://a.c http://abc
Tags: *special, binary search, data structures, implementation, sortings, strings
Correct Solution:
```
P = 910519
MOD = 32416190071
p = [1]
for i in range(1, 200010):
p.append((P * p[i - 1]) % MOD)
n = int(input())
s = list(set([input() for i in range(n)]))
n = len(s)
name = ['' for i in range(n)]
path = ['' for i in range(n)]
mp = {}
for i in range(n):
link = s[i]
j = link[7:].find('/')
if j != -1:
path[i] = link[j + 7:]
name[i] = link[:j + 7]
else:
name[i] = link
for i in range(n):
if path[i] not in mp:
mp[path[i]] = len(mp)
h = {name[i] : 0 for i in range(n)}
for i in range(n):
h[name[i]] += p[mp[path[i]]]
gp = {}
for key, val in h.items():
if val in gp:
gp[val].append(key)
else:
gp[val] = [key]
ans = []
for key, val in gp.items():
if len(val) > 1:
ans.append(val)
print(len(ans))
for a in ans:
print(' '.join(a))
```
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
There are some websites that are accessible through several different addresses. For example, for a long time Codeforces was accessible with two hostnames codeforces.com and codeforces.ru.
You are given a list of page addresses being queried. For simplicity we consider all addresses to have the form http://<hostname>[/<path>], where:
* <hostname> — server name (consists of words and maybe some dots separating them),
* /<path> — optional part, where <path> consists of words separated by slashes.
We consider two <hostname> to correspond to one website if for each query to the first <hostname> there will be exactly the same query to the second one and vice versa — for each query to the second <hostname> there will be the same query to the first one. Take a look at the samples for further clarifications.
Your goal is to determine the groups of server names that correspond to one website. Ignore groups consisting of the only server name.
Please note, that according to the above definition queries http://<hostname> and http://<hostname>/ are different.
Input
The first line of the input contains a single integer n (1 ≤ n ≤ 100 000) — the number of page queries. Then follow n lines each containing exactly one address. Each address is of the form http://<hostname>[/<path>], where:
* <hostname> consists of lowercase English letters and dots, there are no two consecutive dots, <hostname> doesn't start or finish with a dot. The length of <hostname> is positive and doesn't exceed 20.
* <path> consists of lowercase English letters, dots and slashes. There are no two consecutive slashes, <path> doesn't start with a slash and its length doesn't exceed 20.
Addresses are not guaranteed to be distinct.
Output
First print k — the number of groups of server names that correspond to one website. You should count only groups of size greater than one.
Next k lines should contain the description of groups, one group per line. For each group print all server names separated by a single space. You are allowed to print both groups and names inside any group in arbitrary order.
Examples
Input
10
http://abacaba.ru/test
http://abacaba.ru/
http://abacaba.com
http://abacaba.com/test
http://abacaba.de/
http://abacaba.ru/test
http://abacaba.de/test
http://abacaba.com/
http://abacaba.com/t
http://abacaba.com/test
Output
1
http://abacaba.de http://abacaba.ru
Input
14
http://c
http://ccc.bbbb/aba..b
http://cba.com
http://a.c/aba..b/a
http://abc/
http://a.c/
http://ccc.bbbb
http://ab.ac.bc.aa/
http://a.a.a/
http://ccc.bbbb/
http://cba.com/
http://cba.com/aba..b
http://a.a.a/aba..b/a
http://abc/aba..b/a
Output
2
http://cba.com http://ccc.bbbb
http://a.a.a http://a.c http://abc
Tags: *special, binary search, data structures, implementation, sortings, strings
Correct Solution:
```
n=int(input())
d={}; D={}; ans=[]
for _ in range(n): s=input()+'/'; t=s.find('/',7); d.setdefault(s[:t],set()).add(s[t:])
for k in d: D.setdefault(frozenset(d[k]),[]).append(k)
[ans.append(D[k]) for k in D if len(D[k])>1]
print(len(ans))
print('\n'.join(map(' '.join,ans)))
```
| 50,096
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
There are some websites that are accessible through several different addresses. For example, for a long time Codeforces was accessible with two hostnames codeforces.com and codeforces.ru.
You are given a list of page addresses being queried. For simplicity we consider all addresses to have the form http://<hostname>[/<path>], where:
* <hostname> — server name (consists of words and maybe some dots separating them),
* /<path> — optional part, where <path> consists of words separated by slashes.
We consider two <hostname> to correspond to one website if for each query to the first <hostname> there will be exactly the same query to the second one and vice versa — for each query to the second <hostname> there will be the same query to the first one. Take a look at the samples for further clarifications.
Your goal is to determine the groups of server names that correspond to one website. Ignore groups consisting of the only server name.
Please note, that according to the above definition queries http://<hostname> and http://<hostname>/ are different.
Input
The first line of the input contains a single integer n (1 ≤ n ≤ 100 000) — the number of page queries. Then follow n lines each containing exactly one address. Each address is of the form http://<hostname>[/<path>], where:
* <hostname> consists of lowercase English letters and dots, there are no two consecutive dots, <hostname> doesn't start or finish with a dot. The length of <hostname> is positive and doesn't exceed 20.
* <path> consists of lowercase English letters, dots and slashes. There are no two consecutive slashes, <path> doesn't start with a slash and its length doesn't exceed 20.
Addresses are not guaranteed to be distinct.
Output
First print k — the number of groups of server names that correspond to one website. You should count only groups of size greater than one.
Next k lines should contain the description of groups, one group per line. For each group print all server names separated by a single space. You are allowed to print both groups and names inside any group in arbitrary order.
Examples
Input
10
http://abacaba.ru/test
http://abacaba.ru/
http://abacaba.com
http://abacaba.com/test
http://abacaba.de/
http://abacaba.ru/test
http://abacaba.de/test
http://abacaba.com/
http://abacaba.com/t
http://abacaba.com/test
Output
1
http://abacaba.de http://abacaba.ru
Input
14
http://c
http://ccc.bbbb/aba..b
http://cba.com
http://a.c/aba..b/a
http://abc/
http://a.c/
http://ccc.bbbb
http://ab.ac.bc.aa/
http://a.a.a/
http://ccc.bbbb/
http://cba.com/
http://cba.com/aba..b
http://a.a.a/aba..b/a
http://abc/aba..b/a
Output
2
http://cba.com http://ccc.bbbb
http://a.a.a http://a.c http://abc
Tags: *special, binary search, data structures, implementation, sortings, strings
Correct Solution:
```
import sys
from collections import defaultdict
# sys.stdin = open("ivo.in")
n = int(sys.stdin.readline())
h = defaultdict(set)
for iter in range(n):
entry = sys.stdin.readline().rstrip() + "/"
path_start = 7 + entry[7:].index('/')
hostname = entry[:path_start]
path = entry[path_start:]
h[hostname].add(path)
res = defaultdict(list)
for k, v in h.items():
res[frozenset(v)].append(k)
output = []
for v in res.values():
if len(v) > 1:
output.append(" ".join(v))
print(len(output))
for u in output:
print(u)
```
| 50,097
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
There are some websites that are accessible through several different addresses. For example, for a long time Codeforces was accessible with two hostnames codeforces.com and codeforces.ru.
You are given a list of page addresses being queried. For simplicity we consider all addresses to have the form http://<hostname>[/<path>], where:
* <hostname> — server name (consists of words and maybe some dots separating them),
* /<path> — optional part, where <path> consists of words separated by slashes.
We consider two <hostname> to correspond to one website if for each query to the first <hostname> there will be exactly the same query to the second one and vice versa — for each query to the second <hostname> there will be the same query to the first one. Take a look at the samples for further clarifications.
Your goal is to determine the groups of server names that correspond to one website. Ignore groups consisting of the only server name.
Please note, that according to the above definition queries http://<hostname> and http://<hostname>/ are different.
Input
The first line of the input contains a single integer n (1 ≤ n ≤ 100 000) — the number of page queries. Then follow n lines each containing exactly one address. Each address is of the form http://<hostname>[/<path>], where:
* <hostname> consists of lowercase English letters and dots, there are no two consecutive dots, <hostname> doesn't start or finish with a dot. The length of <hostname> is positive and doesn't exceed 20.
* <path> consists of lowercase English letters, dots and slashes. There are no two consecutive slashes, <path> doesn't start with a slash and its length doesn't exceed 20.
Addresses are not guaranteed to be distinct.
Output
First print k — the number of groups of server names that correspond to one website. You should count only groups of size greater than one.
Next k lines should contain the description of groups, one group per line. For each group print all server names separated by a single space. You are allowed to print both groups and names inside any group in arbitrary order.
Examples
Input
10
http://abacaba.ru/test
http://abacaba.ru/
http://abacaba.com
http://abacaba.com/test
http://abacaba.de/
http://abacaba.ru/test
http://abacaba.de/test
http://abacaba.com/
http://abacaba.com/t
http://abacaba.com/test
Output
1
http://abacaba.de http://abacaba.ru
Input
14
http://c
http://ccc.bbbb/aba..b
http://cba.com
http://a.c/aba..b/a
http://abc/
http://a.c/
http://ccc.bbbb
http://ab.ac.bc.aa/
http://a.a.a/
http://ccc.bbbb/
http://cba.com/
http://cba.com/aba..b
http://a.a.a/aba..b/a
http://abc/aba..b/a
Output
2
http://cba.com http://ccc.bbbb
http://a.a.a http://a.c http://abc
Tags: *special, binary search, data structures, implementation, sortings, strings
Correct Solution:
```
n=int(input())
d={}
D={}
for i in range(n):
h,*p=(input()[7:]+'/').split('/')
d.setdefault(h,set()).add('/'.join(p))
for x in d:
t=tuple(sorted(d[x]))
D.setdefault(t,[]).append(x)
def ans():
for x in D:
if len(D[x])>1:
yield 'http://'+' http://'.join(D[x])
print(sum(1 for x in D if len(D[x])>1))
print('\n'.join(ans()))
```
| 50,098
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
There are some websites that are accessible through several different addresses. For example, for a long time Codeforces was accessible with two hostnames codeforces.com and codeforces.ru.
You are given a list of page addresses being queried. For simplicity we consider all addresses to have the form http://<hostname>[/<path>], where:
* <hostname> — server name (consists of words and maybe some dots separating them),
* /<path> — optional part, where <path> consists of words separated by slashes.
We consider two <hostname> to correspond to one website if for each query to the first <hostname> there will be exactly the same query to the second one and vice versa — for each query to the second <hostname> there will be the same query to the first one. Take a look at the samples for further clarifications.
Your goal is to determine the groups of server names that correspond to one website. Ignore groups consisting of the only server name.
Please note, that according to the above definition queries http://<hostname> and http://<hostname>/ are different.
Input
The first line of the input contains a single integer n (1 ≤ n ≤ 100 000) — the number of page queries. Then follow n lines each containing exactly one address. Each address is of the form http://<hostname>[/<path>], where:
* <hostname> consists of lowercase English letters and dots, there are no two consecutive dots, <hostname> doesn't start or finish with a dot. The length of <hostname> is positive and doesn't exceed 20.
* <path> consists of lowercase English letters, dots and slashes. There are no two consecutive slashes, <path> doesn't start with a slash and its length doesn't exceed 20.
Addresses are not guaranteed to be distinct.
Output
First print k — the number of groups of server names that correspond to one website. You should count only groups of size greater than one.
Next k lines should contain the description of groups, one group per line. For each group print all server names separated by a single space. You are allowed to print both groups and names inside any group in arbitrary order.
Examples
Input
10
http://abacaba.ru/test
http://abacaba.ru/
http://abacaba.com
http://abacaba.com/test
http://abacaba.de/
http://abacaba.ru/test
http://abacaba.de/test
http://abacaba.com/
http://abacaba.com/t
http://abacaba.com/test
Output
1
http://abacaba.de http://abacaba.ru
Input
14
http://c
http://ccc.bbbb/aba..b
http://cba.com
http://a.c/aba..b/a
http://abc/
http://a.c/
http://ccc.bbbb
http://ab.ac.bc.aa/
http://a.a.a/
http://ccc.bbbb/
http://cba.com/
http://cba.com/aba..b
http://a.a.a/aba..b/a
http://abc/aba..b/a
Output
2
http://cba.com http://ccc.bbbb
http://a.a.a http://a.c http://abc
Tags: *special, binary search, data structures, implementation, sortings, strings
Correct Solution:
```
from itertools import groupby
web_addresses_number = int(input())
prephix = "http://"
def split_address(address):
host = ""
path = ""
address = address[7:]
i = 0
while i < len(address) and address[i] != '/':
host += address[i]
i += 1
while i < len(address):
path += address[i]
i += 1
return (host, path)
hosts = {}
for i in range(web_addresses_number):
host, path = split_address(input())
if host in hosts:
hosts[host].add(path)
else:
hosts[host] = {path}
groups = []
hosts = {host:"+".join(sorted(hosts[host])) for host in hosts}
groping = groupby(sorted(hosts, key = lambda host: hosts[host]), key = lambda host: hosts[host])
for key, group in groping:
g = list(group)
if len(g) > 1:
groups.append(g)
print(len(groups))
[print(" ".join(map(lambda host: prephix + host, group))) for group in groups]
```
| 50,099
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
There are some websites that are accessible through several different addresses. For example, for a long time Codeforces was accessible with two hostnames codeforces.com and codeforces.ru.
You are given a list of page addresses being queried. For simplicity we consider all addresses to have the form http://<hostname>[/<path>], where:
* <hostname> — server name (consists of words and maybe some dots separating them),
* /<path> — optional part, where <path> consists of words separated by slashes.
We consider two <hostname> to correspond to one website if for each query to the first <hostname> there will be exactly the same query to the second one and vice versa — for each query to the second <hostname> there will be the same query to the first one. Take a look at the samples for further clarifications.
Your goal is to determine the groups of server names that correspond to one website. Ignore groups consisting of the only server name.
Please note, that according to the above definition queries http://<hostname> and http://<hostname>/ are different.
Input
The first line of the input contains a single integer n (1 ≤ n ≤ 100 000) — the number of page queries. Then follow n lines each containing exactly one address. Each address is of the form http://<hostname>[/<path>], where:
* <hostname> consists of lowercase English letters and dots, there are no two consecutive dots, <hostname> doesn't start or finish with a dot. The length of <hostname> is positive and doesn't exceed 20.
* <path> consists of lowercase English letters, dots and slashes. There are no two consecutive slashes, <path> doesn't start with a slash and its length doesn't exceed 20.
Addresses are not guaranteed to be distinct.
Output
First print k — the number of groups of server names that correspond to one website. You should count only groups of size greater than one.
Next k lines should contain the description of groups, one group per line. For each group print all server names separated by a single space. You are allowed to print both groups and names inside any group in arbitrary order.
Examples
Input
10
http://abacaba.ru/test
http://abacaba.ru/
http://abacaba.com
http://abacaba.com/test
http://abacaba.de/
http://abacaba.ru/test
http://abacaba.de/test
http://abacaba.com/
http://abacaba.com/t
http://abacaba.com/test
Output
1
http://abacaba.de http://abacaba.ru
Input
14
http://c
http://ccc.bbbb/aba..b
http://cba.com
http://a.c/aba..b/a
http://abc/
http://a.c/
http://ccc.bbbb
http://ab.ac.bc.aa/
http://a.a.a/
http://ccc.bbbb/
http://cba.com/
http://cba.com/aba..b
http://a.a.a/aba..b/a
http://abc/aba..b/a
Output
2
http://cba.com http://ccc.bbbb
http://a.a.a http://a.c http://abc
Tags: *special, binary search, data structures, implementation, sortings, strings
Correct Solution:
```
import sys
n = int(input())
domains = {}
for full_request in sys.stdin:
request = full_request[7:-1]
domain, sep, path = request.partition('/')
if domain in domains:
domains[domain].add(sep + path)
else:
domains[domain] = {sep + path}
path_hashes = []
for domain, paths in domains.items():
path_hashes.append(('|'.join(sorted(paths)), domain))
sorted_hashes = sorted(path_hashes, key=lambda x: x[0])
previous_hash = None
previous_domains = []
groups = []
for path_hash, domain in sorted_hashes:
if previous_hash == path_hash:
previous_domains.append(domain)
else:
previous_hash = path_hash
if len(previous_domains) > 1:
groups.append(previous_domains)
previous_domains = [domain]
if len(previous_domains) > 1:
groups.append(previous_domains)
print(len(groups))
print('\n'.join(map(lambda x: ' '.join(map(lambda y: 'http://' + y, x)), groups)))
```
| 50,100
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
There are some websites that are accessible through several different addresses. For example, for a long time Codeforces was accessible with two hostnames codeforces.com and codeforces.ru.
You are given a list of page addresses being queried. For simplicity we consider all addresses to have the form http://<hostname>[/<path>], where:
* <hostname> — server name (consists of words and maybe some dots separating them),
* /<path> — optional part, where <path> consists of words separated by slashes.
We consider two <hostname> to correspond to one website if for each query to the first <hostname> there will be exactly the same query to the second one and vice versa — for each query to the second <hostname> there will be the same query to the first one. Take a look at the samples for further clarifications.
Your goal is to determine the groups of server names that correspond to one website. Ignore groups consisting of the only server name.
Please note, that according to the above definition queries http://<hostname> and http://<hostname>/ are different.
Input
The first line of the input contains a single integer n (1 ≤ n ≤ 100 000) — the number of page queries. Then follow n lines each containing exactly one address. Each address is of the form http://<hostname>[/<path>], where:
* <hostname> consists of lowercase English letters and dots, there are no two consecutive dots, <hostname> doesn't start or finish with a dot. The length of <hostname> is positive and doesn't exceed 20.
* <path> consists of lowercase English letters, dots and slashes. There are no two consecutive slashes, <path> doesn't start with a slash and its length doesn't exceed 20.
Addresses are not guaranteed to be distinct.
Output
First print k — the number of groups of server names that correspond to one website. You should count only groups of size greater than one.
Next k lines should contain the description of groups, one group per line. For each group print all server names separated by a single space. You are allowed to print both groups and names inside any group in arbitrary order.
Examples
Input
10
http://abacaba.ru/test
http://abacaba.ru/
http://abacaba.com
http://abacaba.com/test
http://abacaba.de/
http://abacaba.ru/test
http://abacaba.de/test
http://abacaba.com/
http://abacaba.com/t
http://abacaba.com/test
Output
1
http://abacaba.de http://abacaba.ru
Input
14
http://c
http://ccc.bbbb/aba..b
http://cba.com
http://a.c/aba..b/a
http://abc/
http://a.c/
http://ccc.bbbb
http://ab.ac.bc.aa/
http://a.a.a/
http://ccc.bbbb/
http://cba.com/
http://cba.com/aba..b
http://a.a.a/aba..b/a
http://abc/aba..b/a
Output
2
http://cba.com http://ccc.bbbb
http://a.a.a http://a.c http://abc
Tags: *special, binary search, data structures, implementation, sortings, strings
Correct Solution:
```
n=int(input())
d={}
D={}
for i in range(n):
h,*p=(input()[7:]+'/').split('/')
d.setdefault(h,set()).add('/'.join(p))
for x in d: D.setdefault(frozenset(d[x]),[]).append(x)
def ans():
for x in D:
if len(D[x])>1:
yield 'http://'+' http://'.join(D[x])
print(sum(1 for x in D if len(D[x])>1))
print('\n'.join(ans()))
```
| 50,101
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
There are some websites that are accessible through several different addresses. For example, for a long time Codeforces was accessible with two hostnames codeforces.com and codeforces.ru.
You are given a list of page addresses being queried. For simplicity we consider all addresses to have the form http://<hostname>[/<path>], where:
* <hostname> — server name (consists of words and maybe some dots separating them),
* /<path> — optional part, where <path> consists of words separated by slashes.
We consider two <hostname> to correspond to one website if for each query to the first <hostname> there will be exactly the same query to the second one and vice versa — for each query to the second <hostname> there will be the same query to the first one. Take a look at the samples for further clarifications.
Your goal is to determine the groups of server names that correspond to one website. Ignore groups consisting of the only server name.
Please note, that according to the above definition queries http://<hostname> and http://<hostname>/ are different.
Input
The first line of the input contains a single integer n (1 ≤ n ≤ 100 000) — the number of page queries. Then follow n lines each containing exactly one address. Each address is of the form http://<hostname>[/<path>], where:
* <hostname> consists of lowercase English letters and dots, there are no two consecutive dots, <hostname> doesn't start or finish with a dot. The length of <hostname> is positive and doesn't exceed 20.
* <path> consists of lowercase English letters, dots and slashes. There are no two consecutive slashes, <path> doesn't start with a slash and its length doesn't exceed 20.
Addresses are not guaranteed to be distinct.
Output
First print k — the number of groups of server names that correspond to one website. You should count only groups of size greater than one.
Next k lines should contain the description of groups, one group per line. For each group print all server names separated by a single space. You are allowed to print both groups and names inside any group in arbitrary order.
Examples
Input
10
http://abacaba.ru/test
http://abacaba.ru/
http://abacaba.com
http://abacaba.com/test
http://abacaba.de/
http://abacaba.ru/test
http://abacaba.de/test
http://abacaba.com/
http://abacaba.com/t
http://abacaba.com/test
Output
1
http://abacaba.de http://abacaba.ru
Input
14
http://c
http://ccc.bbbb/aba..b
http://cba.com
http://a.c/aba..b/a
http://abc/
http://a.c/
http://ccc.bbbb
http://ab.ac.bc.aa/
http://a.a.a/
http://ccc.bbbb/
http://cba.com/
http://cba.com/aba..b
http://a.a.a/aba..b/a
http://abc/aba..b/a
Output
2
http://cba.com http://ccc.bbbb
http://a.a.a http://a.c http://abc
Tags: *special, binary search, data structures, implementation, sortings, strings
Correct Solution:
```
import sys
d = dict()
b='/'
for line in sys.stdin:
line=line[:-1].split(b)
host,coso=b.join(line[:3]), b.join(line[3:])
if len(line)>3: coso='/'+coso
if len(line)>1:
if host in d: d[host].append("I"+coso)
else: d[host]=["I"+coso]
for host in d:
b = ','
d[host]=sorted(set(d[host]))
d[host]=b.join(d[host])
d2=dict()
for host in d:
if d[host] in d2: d2[d[host]].append(host)
else: d2[d[host]]=[host]
print (sum([len(d2[x])>1 for x in d2]))
for x in d2:
ans = ""
if len(d2[x])>1:
for i in d2[x]: ans+=i+' '
print (ans)
```
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
You have recently fallen through a hole and, after several hours of unconsciousness, have realized you are in an underground city. On one of your regular, daily walks through the unknown, you have encountered two unusually looking skeletons called Sanz and P’pairus, who decided to accompany you and give you some puzzles for seemingly unknown reasons.
One day, Sanz has created a crossword for you. Not any kind of crossword, but a 1D crossword! You are given m words and a string of length n. You are also given an array p, which designates how much each word is worth — the i-th word is worth pi points. Whenever you find one of the m words in the string, you are given the corresponding number of points. Each position in the crossword can be used at most x times. A certain word can be counted at different places, but you cannot count the same appearance of a word multiple times. If a word is a substring of another word, you can count them both (presuming you haven’t used the positions more than x times).
In order to solve the puzzle, you need to tell Sanz what’s the maximum achievable number of points in the crossword. There is no need to cover all postions, just get the maximal score! Crossword and words contain only lowercase English letters.
Input
The first line of the input contains a single integer n (1 ≤ n ≤ 500) — the length of the crossword. The second line contains the crossword string. The third line contains a single integer m (1 ≤ m ≤ 100) — the number of given words, and next m lines contain description of words: each line will have a string representing a non-empty word (its length doesn't exceed the length of the crossword) and integer pi (0 ≤ pi ≤ 100). Last line of the input will contain x (1 ≤ x ≤ 100) — maximum number of times a position in crossword can be used.
Output
Output single integer — maximum number of points you can get.
Example
Input
6
abacba
2
aba 6
ba 3
3
Output
12
Note
For example, with the string "abacba", words "aba" (6 points) and "ba" (3 points), and x = 3, you can get at most 12 points - the word "aba" appears once ("abacba"), while "ba" appears two times ("abacba"). Note that for x = 1, you could get at most 9 points, since you wouldn’t be able to count both "aba" and the first appearance of "ba".
Tags: flows
Correct Solution:
```
import sys
from heapq import heappop, heappush
class Edge:
def __init__(self, u, v, cap, flow, cost, rev) -> None:
self.u = u
self.v = v
self.cap = cap
self.flow = flow
self.cost = cost
self.rev = rev
def add_edge(adj, u, v, capv, flowv, costv):
if u == 6 and v == 7:
foo = 0
adj[u].append(Edge(u, v, capv, flowv, costv, len(adj[v])))
adj[v].append(Edge(v, u, 0, flowv, -costv, len(adj[u])-1))
def match(crossword, cw_idx, word):
for k in range(len(word)):
if crossword[cw_idx + k] != word[k]:
return False
return True
def read_input():
'''
6
abacba
5
aba 6
ba 3
bac 4
cb 3
c 6
2
'''
n = int(sys.stdin.readline())
# n = int('6\n')
crossword = sys.stdin.readline()[:-1]
# crossword = 'abacba\n'[:-1]
m = int(sys.stdin.readline())
# m = int('5\n')
adj = [[] for _ in range(n+2)]
# foo
m_words = ["aba 6\n", "ba 3\n", "bac 4\n", "cb 3\n", "c 6"]
# print(len(cost))
for idx in range(m):
word, p = sys.stdin.readline().split()
# word, p = m_words[idx].split()
p = int(p)
i = 0
while i + len(word) <= n:
if match(crossword, i, word):
u, v = i + 1, i + 1 + len(word)
# print((u, v))
add_edge(adj, u, v, 1, 0, -p)
i += 1
x = int(sys.stdin.readline())
# x = int('2\n')
for i in range(n + 1):
u, v = i, i + 1
# print((u, v))
add_edge(adj, u, v, x, 0, 0)
return adj
def bellman_ford(adj, potencial):
for _ in range(len(adj)):
for u in range(len(adj)):
for e in adj[u]:
reduced_cost = potencial[e.u] + e.cost - potencial[e.v]
if e.cap > 0 and reduced_cost < 0:
potencial[e.v] += reduced_cost
def dijkstra(adj, potencial, dist, pi, s, t):
oo = float('inf')
for u in range(len(adj)):
dist[u] = +oo
pi[u] = None
dist[s] = 0
heap = [(0, s)]
while heap:
du, u = heappop(heap)
if dist[u] < du: continue
if u == t: break
for e in adj[u]:
reduced_cost = potencial[e.u] + e.cost - potencial[e.v]
if e.flow < e.cap and dist[e.v] > dist[e.u] + reduced_cost:
dist[e.v] = dist[e.u] + reduced_cost
heappush(heap, (dist[e.v], e.v))
pi[e.v] = e
def min_cost_max_flow(adj):
min_cost, max_flow = 0, 0
potencial, oo = [0] * len(adj), float('inf')
dist, pi = [+oo] * len(adj), [None] * len(adj)
bellman_ford(adj, potencial)
s, t = 0, len(adj) - 1
while True:
dijkstra(adj, potencial, dist, pi, s, t)
if dist[t] == +oo:
break
for u in range(len(adj)):
if dist[u] < dist[t]:
potencial[u] += dist[u] - dist[t]
limit, v = +oo, t
while v:
e = pi[v]
limit = min(limit, e.cap - e.flow)
v = e.u
v = t
while v:
e = pi[v]
e.flow += limit
try:
adj[v][e.rev].flow -= limit
except:
adj[v][e.rev].flow -= limit
v = e.u
min_cost += limit * (potencial[t] - potencial[s])
max_flow += limit
# path = []
# v = t
# while v:
# path.append(v)
# v = pi[v]
# path.reverse()
# print(path)
return min_cost, max_flow
adj = read_input()
# print({
# 'len(adj)': len(adj),
# 'len(cap)': len(cap),
# 'len(cost)': len(cost)
# })
# print({ 'adj': adj})
# print({ 'cap': cap})
# print({ 'cost': cost})
min_cost, _ = min_cost_max_flow(adj)
print(-min_cost)
```
| 50,113
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
You have recently fallen through a hole and, after several hours of unconsciousness, have realized you are in an underground city. On one of your regular, daily walks through the unknown, you have encountered two unusually looking skeletons called Sanz and P’pairus, who decided to accompany you and give you some puzzles for seemingly unknown reasons.
One day, Sanz has created a crossword for you. Not any kind of crossword, but a 1D crossword! You are given m words and a string of length n. You are also given an array p, which designates how much each word is worth — the i-th word is worth pi points. Whenever you find one of the m words in the string, you are given the corresponding number of points. Each position in the crossword can be used at most x times. A certain word can be counted at different places, but you cannot count the same appearance of a word multiple times. If a word is a substring of another word, you can count them both (presuming you haven’t used the positions more than x times).
In order to solve the puzzle, you need to tell Sanz what’s the maximum achievable number of points in the crossword. There is no need to cover all postions, just get the maximal score! Crossword and words contain only lowercase English letters.
Input
The first line of the input contains a single integer n (1 ≤ n ≤ 500) — the length of the crossword. The second line contains the crossword string. The third line contains a single integer m (1 ≤ m ≤ 100) — the number of given words, and next m lines contain description of words: each line will have a string representing a non-empty word (its length doesn't exceed the length of the crossword) and integer pi (0 ≤ pi ≤ 100). Last line of the input will contain x (1 ≤ x ≤ 100) — maximum number of times a position in crossword can be used.
Output
Output single integer — maximum number of points you can get.
Example
Input
6
abacba
2
aba 6
ba 3
3
Output
12
Note
For example, with the string "abacba", words "aba" (6 points) and "ba" (3 points), and x = 3, you can get at most 12 points - the word "aba" appears once ("abacba"), while "ba" appears two times ("abacba"). Note that for x = 1, you could get at most 9 points, since you wouldn’t be able to count both "aba" and the first appearance of "ba".
Tags: flows
Correct Solution:
```
import sys
from heapq import heappop, heappush
class Edge:
def __init__(self, u, v, cap, flow, cost, rev) -> None:
self.u = u
self.v = v
self.cap = cap
self.flow = flow
self.cost = cost
self.rev = rev
def add_edge(adj, u, v, capv, flowv, costv):
if u == 6 and v == 7:
foo = 0
adj[u].append(Edge(u, v, capv, flowv, costv, len(adj[v])))
adj[v].append(Edge(v, u, 0, flowv, -costv, len(adj[u])-1))
def match(crossword, cw_idx, word):
for k in range(len(word)):
if crossword[cw_idx + k] != word[k]:
return False
return True
def read_input():
'''
6
abacba
5
aba 6
ba 3
bac 4
cb 3
c 6
2
'''
n = int(sys.stdin.readline())
# n = int('6\n')
crossword = sys.stdin.readline()[:-1]
# crossword = 'abacba\n'[:-1]
m = int(sys.stdin.readline())
# m = int('5\n')
adj = [[] for _ in range(n+2)]
# foo
m_words = ["aba 6\n", "ba 3\n", "bac 4\n", "cb 3\n", "c 6"]
# print(len(cost))
for idx in range(m):
word, p = sys.stdin.readline().split()
# word, p = m_words[idx].split()
p = int(p)
i = 0
while i + len(word) <= n:
if match(crossword, i, word):
u, v = i + 1, i + 1 + len(word)
# print((u, v))
add_edge(adj, u, v, 1, 0, -p)
i += 1
x = int(sys.stdin.readline())
# x = int('2\n')
for i in range(n + 1):
u, v = i, i + 1
# print((u, v))
add_edge(adj, u, v, x, 0, 0)
return adj
def bellman_ford(adj, potencial):
for _ in range(len(adj)):
for u in range(len(adj)):
for e in adj[u]:
reduced_cost = potencial[e.u] + e.cost - potencial[e.v]
if e.cap > 0 and reduced_cost < 0:
potencial[e.v] += reduced_cost
def dijkstra(adj, potencial, dist, pi, s, t):
oo = float('inf')
for u in range(len(adj)):
dist[u] = +oo
pi[u] = None
dist[s] = 0
heap = [(0, s)]
while heap:
du, u = heappop(heap)
if dist[u] < du: continue
if u == t: break
for e in adj[u]:
reduced_cost = potencial[e.u] + e.cost - potencial[e.v]
if e.flow < e.cap and dist[e.v] > dist[e.u] + reduced_cost:
dist[e.v] = dist[e.u] + reduced_cost
heappush(heap, (dist[e.v], e.v))
pi[e.v] = e
def min_cost_max_flow(adj):
min_cost, max_flow = 0, 0
potencial, oo = [0] * len(adj), float('inf')
dist, pi = [+oo] * len(adj), [None] * len(adj)
bellman_ford(adj, potencial)
s, t = 0, len(adj) - 1
while True:
dijkstra(adj, potencial, dist, pi, s, t)
if dist[t] == +oo:
break
for u in range(len(adj)):
if dist[u] < dist[t]:
potencial[u] += dist[u] - dist[t]
limit, v = +oo, t
while v:
e = pi[v]
limit = min(limit, e.cap - e.flow)
v = e.u
v = t
while v:
e = pi[v]
e.flow += limit
try:
adj[v][e.rev].flow -= limit
except:
adj[v][e.rev].flow -= limit
v = e.u
min_cost += limit * (potencial[t] - potencial[s])
max_flow += limit
# path = []
# v = t
# while v:
# path.append(v)
# v = pi[v].u
# path.reverse()
# print(path)
return min_cost, max_flow
adj = read_input()
# print({
# 'len(adj)': len(adj),
# 'len(cap)': len(cap),
# 'len(cost)': len(cost)
# })
# print({ 'adj': adj})
# print({ 'cap': cap})
# print({ 'cost': cost})
min_cost, _ = min_cost_max_flow(adj)
print(-min_cost)
```
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
You have recently fallen through a hole and, after several hours of unconsciousness, have realized you are in an underground city. On one of your regular, daily walks through the unknown, you have encountered two unusually looking skeletons called Sanz and P’pairus, who decided to accompany you and give you some puzzles for seemingly unknown reasons.
One day, Sanz has created a crossword for you. Not any kind of crossword, but a 1D crossword! You are given m words and a string of length n. You are also given an array p, which designates how much each word is worth — the i-th word is worth pi points. Whenever you find one of the m words in the string, you are given the corresponding number of points. Each position in the crossword can be used at most x times. A certain word can be counted at different places, but you cannot count the same appearance of a word multiple times. If a word is a substring of another word, you can count them both (presuming you haven’t used the positions more than x times).
In order to solve the puzzle, you need to tell Sanz what’s the maximum achievable number of points in the crossword. There is no need to cover all postions, just get the maximal score! Crossword and words contain only lowercase English letters.
Input
The first line of the input contains a single integer n (1 ≤ n ≤ 500) — the length of the crossword. The second line contains the crossword string. The third line contains a single integer m (1 ≤ m ≤ 100) — the number of given words, and next m lines contain description of words: each line will have a string representing a non-empty word (its length doesn't exceed the length of the crossword) and integer pi (0 ≤ pi ≤ 100). Last line of the input will contain x (1 ≤ x ≤ 100) — maximum number of times a position in crossword can be used.
Output
Output single integer — maximum number of points you can get.
Example
Input
6
abacba
2
aba 6
ba 3
3
Output
12
Note
For example, with the string "abacba", words "aba" (6 points) and "ba" (3 points), and x = 3, you can get at most 12 points - the word "aba" appears once ("abacba"), while "ba" appears two times ("abacba"). Note that for x = 1, you could get at most 9 points, since you wouldn’t be able to count both "aba" and the first appearance of "ba".
Tags: flows
Correct Solution:
```
import sys
from heapq import heappop, heappush
class Edge:
def __init__(self, u, v, cap, flow, cost, rev):
self.u = u
self.v = v
self.cap = cap
self.flow = flow
self.cost = cost
self.rev = rev
def add_edge(adj, u, v, capv, flowv, costv):
adj[u].append(Edge(u, v, capv, flowv, costv, len(adj[v])))
adj[v].append(Edge(v, u, 0, flowv, -costv, len(adj[u])-1))
def match(crossword, cw_idx, word):
for k in range(len(word)):
if crossword[cw_idx + k] != word[k]:
return False
return True
def read_input():
n = int(sys.stdin.readline())
crossword = sys.stdin.readline()[:-1]
m = int(sys.stdin.readline())
adj = [[] for _ in range(n+2)]
for _ in range(m):
word, p = sys.stdin.readline().split()
p = int(p)
i = 0
while i + len(word) <= n:
if match(crossword, i, word):
u, v = i + 1, i + 1 + len(word)
add_edge(adj, u, v, 1, 0, -p)
i += 1
x = int(sys.stdin.readline())
for i in range(n + 1):
u, v = i, i + 1
add_edge(adj, u, v, x, 0, 0)
return adj
def bellman_ford(adj):
potential = [0] * len(adj)
for _ in range(len(adj)):
for u in range(len(adj)):
for e in adj[u]:
reduced_cost = potential[e.u] + e.cost - potential[e.v]
if e.cap > 0 and reduced_cost < 0:
potential[e.v] += reduced_cost
return potential
def dijkstra(adj, potential, s, t):
oo = float('inf')
dist, pi = [+oo] * len(adj), [None] * len(adj)
dist[s] = 0
heap = [(0, s)]
while heap:
du, u = heappop(heap)
if dist[u] < du: continue
if u == t: break
for e in adj[u]:
reduced_cost = potential[e.u] + e.cost - potential[e.v]
if e.cap - e.flow > 0 and dist[e.v] > dist[e.u] + reduced_cost:
dist[e.v] = dist[e.u] + reduced_cost
heappush(heap, (dist[e.v], e.v))
pi[e.v] = e
return dist, pi
def min_cost_max_flow(adj):
min_cost, max_flow = 0, 0
oo = float('inf')
potential = bellman_ford(adj)
s, t = 0, len(adj) - 1
while True:
dist, pi = dijkstra(adj, potential, s, t)
if dist[t] == +oo:
break
for u in range(len(adj)):
if dist[u] < dist[t]:
potential[u] += dist[u] - dist[t]
limit, v = +oo, t
while v:
e = pi[v]
limit = min(limit, e.cap - e.flow)
v = e.u
v = t
while v:
e = pi[v]
e.flow += limit
adj[v][e.rev].flow -= limit
v = e.u
min_cost += limit * (potential[t] - potential[s])
max_flow += limit
return min_cost, max_flow
adj = read_input()
min_cost, _ = min_cost_max_flow(adj)
print(-min_cost)
```
| 50,115
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given a mysterious language (codenamed "Secret") available in "Custom Test" tab. Find out what this language is and write a program which outputs its name. Note that the program must be written in this language.
Input
This program has only one test, and it's empty (it doesn't give your program anything to read).
Output
Output the name of the mysterious language.
Examples
Tags: *special
Correct Solution:
```
print('INTERCAL')
```
| 50,750
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given a mysterious language (codenamed "Secret") available in "Custom Test" tab. Find out what this language is and write a program which outputs its name. Note that the program must be written in this language.
Input
This program has only one test, and it's empty (it doesn't give your program anything to read).
Output
Output the name of the mysterious language.
Examples
Tags: *special
Correct Solution:
```
#!/usr/bin/env python
from __future__ import division, print_function
import math
import os
import sys
from fractions import *
from sys import *
from io import BytesIO, IOBase
from itertools import *
from collections import *
# sys.setrecursionlimit(10**5)
if sys.version_info[0] < 3:
from __builtin__ import xrange as range
from future_builtins import ascii, filter, hex, map, oct, zip
# sys.setrecursionlimit(10**6)
# region fastio
BUFSIZE = 8192
class FastIO(IOBase):
newlines = 0
def __init__(self, file):
self._fd = file.fileno()
self.buffer = BytesIO()
self.writable = "x" in file.mode or "r" not in file.mode
self.write = self.buffer.write if self.writable else None
def read(self):
while True:
b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
if not b:
break
ptr = self.buffer.tell()
self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
self.newlines = 0
return self.buffer.read()
def readline(self):
while self.newlines == 0:
b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
self.newlines = b.count(b"\n") + (not b)
ptr = self.buffer.tell()
self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
self.newlines -= 1
return self.buffer.readline()
def flush(self):
if self.writable:
os.write(self._fd, self.buffer.getvalue())
self.buffer.truncate(0), self.buffer.seek(0)
class IOWrapper(IOBase):
def __init__(self, file):
self.buffer = FastIO(file)
self.flush = self.buffer.flush
self.writable = self.buffer.writable
self.write = lambda s: self.buffer.write(s.encode("ascii"))
self.read = lambda: self.buffer.read().decode("ascii")
self.readline = lambda: self.buffer.readline().decode("ascii")
def print(*args, **kwargs):
"""Prints the values to a stream, or to sys.stdout by default."""
sep, file = kwargs.pop("sep", " "), kwargs.pop("file", sys.stdout)
at_start = True
for x in args:
if not at_start:
file.write(sep)
file.write(str(x))
at_start = False
file.write(kwargs.pop("end", "\n"))
if kwargs.pop("flush", False):
file.flush()
if sys.version_info[0] < 3:
sys.stdin, sys.stdout = FastIO(sys.stdin), FastIO(sys.stdout)
else:
sys.stdin, sys.stdout = IOWrapper(sys.stdin), IOWrapper(sys.stdout)
input = lambda: sys.stdin.readline().rstrip("\r\n")
def inp(): return sys.stdin.readline().rstrip("\r\n") # for fast input
def out(var): sys.stdout.write(str(var)) # for fast output, always take string
def lis(): return list(map(int, inp().split()))
def stringlis(): return list(map(str, inp().split()))
def sep(): return map(int, inp().split())
def strsep(): return map(str, inp().split())
def fsep(): return map(float, inp().split())
def inpu(): return int(inp())
# -----------------------------------------------------------------
def regularbracket(t):
p = 0
for i in t:
if i == "(":
p += 1
else:
p -= 1
if p < 0:
return False
else:
if p > 0:
return False
else:
return True
# -------------------------------------------------
def binarySearchCount(arr, n, key):
left = 0
right = n - 1
count = 0
while (left <= right):
mid = int((right + left) / 2)
# Check if middle element is
# less than or equal to key
if (arr[mid] <= key):
count = mid + 1
left = mid + 1
# If key is smaller, ignore right half
else:
right = mid - 1
return count
# ------------------------------reverse string(pallindrome)
def reverse1(string):
pp = ""
for i in string[::-1]:
pp += i
if pp == string:
return True
return False
# --------------------------------reverse list(paindrome)
def reverse2(list1):
l = []
for i in list1[::-1]:
l.append(i)
if l == list1:
return True
return False
def mex(list1):
# list1 = sorted(list1)
p = max(list1) + 1
for i in range(len(list1)):
if list1[i] != i:
p = i
break
return p
def sumofdigits(n):
n = str(n)
s1 = 0
for i in n:
s1 += int(i)
return s1
def perfect_square(n):
s = math.sqrt(n)
if s == int(s):
return True
return False
# -----------------------------roman
def roman_number(x):
if x > 15999:
return
value = [5000, 4000, 1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1]
symbol = ["F", "MF", "M", "CM", "D", "CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I"]
roman = ""
i = 0
while x > 0:
div = x // value[i]
x = x % value[i]
while div:
roman += symbol[i]
div -= 1
i += 1
return roman
def soretd(s):
for i in range(1, len(s)):
if s[i - 1] > s[i]:
return False
return True
# print(soretd("1"))
# ---------------------------
def countRhombi(h, w):
ct = 0
for i in range(2, h + 1, 2):
for j in range(2, w + 1, 2):
ct += (h - i + 1) * (w - j + 1)
return ct
def countrhombi2(h, w):
return ((h * h) // 4) * ((w * w) // 4)
# ---------------------------------
def binpow(a, b):
if b == 0:
return 1
else:
res = binpow(a, b // 2)
if b % 2 != 0:
return res * res * a
else:
return res * res
# -------------------------------------------------------
def binpowmodulus(a, b, m):
a %= m
res = 1
while (b > 0):
if (b & 1):
res = res * a % m
a = a * a % m
b >>= 1
return res
# -------------------------------------------------------------
def coprime_to_n(n):
result = n
i = 2
while (i * i <= n):
if (n % i == 0):
while (n % i == 0):
n //= i
result -= result // i
i += 1
if (n > 1):
result -= result // n
return result
# -------------------prime
def prime(x):
if x == 1:
return False
else:
for i in range(2, int(math.sqrt(x)) + 1):
if (x % i == 0):
return False
else:
return True
def luckynumwithequalnumberoffourandseven(x, n, a):
if x >= n and str(x).count("4") == str(x).count("7"):
a.append(x)
else:
if x < 1e12:
luckynumwithequalnumberoffourandseven(x * 10 + 4, n, a)
luckynumwithequalnumberoffourandseven(x * 10 + 7, n, a)
return a
def luckynuber(x, n, a):
p = set(str(x))
if len(p) <= 2:
a.append(x)
if x < n:
luckynuber(x + 1, n, a)
return a
#------------------------------------------------------interactive problems
def interact(type, x):
if type == "r":
inp = input()
return inp.strip()
else:
print(x, flush=True)
#------------------------------------------------------------------zero at end of factorial of a number
def findTrailingZeros(n):
# Initialize result
count = 0
# Keep dividing n by
# 5 & update Count
while (n >= 5):
n //= 5
count += n
return count
#-----------------------------------------------merge sort
# Python program for implementation of MergeSort
def mergeSort(arr):
if len(arr) > 1:
# Finding the mid of the array
mid = len(arr) // 2
# Dividing the array elements
L = arr[:mid]
# into 2 halves
R = arr[mid:]
# Sorting the first half
mergeSort(L)
# Sorting the second half
mergeSort(R)
i = j = k = 0
# Copy data to temp arrays L[] and R[]
while i < len(L) and j < len(R):
if L[i] < R[j]:
arr[k] = L[i]
i += 1
else:
arr[k] = R[j]
j += 1
k += 1
# Checking if any element was left
while i < len(L):
arr[k] = L[i]
i += 1
k += 1
while j < len(R):
arr[k] = R[j]
j += 1
k += 1
#-----------------------------------------------lucky number with two lucky any digits
res = set()
def solve(p, l, a, b,n):#given number
if p > n or l > 10:
return
if p > 0:
res.add(p)
solve(p * 10 + a, l + 1, a, b,n)
solve(p * 10 + b, l + 1, a, b,n)
# problem
"""
n = int(input())
for a in range(0, 10):
for b in range(0, a):
solve(0, 0)
print(len(res))
"""
#-----------------------------------------------
# endregion------------------------------
"""
def main():
n = inpu()
cnt=0
c = n
if n % 7 == 0:
print("7" * (n // 7))
else:
while(c>0):
c-=4
cnt+=1
if c%7==0 and c>=0:
#print(n,n%4)
print("4"*(cnt)+"7"*(c//7))
break
else:
if n % 4 == 0:
print("4" * (n // 4))
else:
print(-1)
if __name__ == '__main__':
main()
"""
"""
def main():
n,t = sep()
arr = lis()
i=0
cnt=0
min1 = min(arr)
while(True):
if t>=arr[i]:
cnt+=1
t-=arr[i]
i+=1
else:
i+=1
if i==n:
i=0
if t<min1:
break
print(cnt)
if __name__ == '__main__':
main()
"""
# Python3 program to find all subsets
# by backtracking.
# In the array A at every step we have two
# choices for each element either we can
# ignore the element or we can include the
# element in our subset
def subsetsUtil(A, subset, index,d):
print(*subset)
s = sum(subset)
d.append(s)
for i in range(index, len(A)):
# include the A[i] in subset.
subset.append(A[i])
# move onto the next element.
subsetsUtil(A, subset, i + 1,d)
# exclude the A[i] from subset and
# triggers backtracking.
subset.pop(-1)
return d
def subsetSums(arr, l, r,d, sum=0):
if l > r:
d.append(sum)
return
subsetSums(arr, l + 1, r,d, sum + arr[l])
# Subset excluding arr[l]
subsetSums(arr, l + 1, r,d, sum)
return d
"""
def main():
t = inpu()
for _ in range(t):
n = inpu()
arr=[]
subset=[]
i=0
l=[]
for j in range(26):
arr.append(3**j)
if __name__ == '__main__':
main()
"""
"""
def main():
n = int(input())
cnt=1
if n==1:
print(1)
else:
for i in range(1,n):
cnt+=i*12
print(cnt)
if __name__ == '__main__':
main()
"""
def main():
print("INTERCAL")
if __name__ == '__main__':
main()
```
| 50,751
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given a mysterious language (codenamed "Secret") available in "Custom Test" tab. Find out what this language is and write a program which outputs its name. Note that the program must be written in this language.
Input
This program has only one test, and it's empty (it doesn't give your program anything to read).
Output
Output the name of the mysterious language.
Examples
Tags: *special
Correct Solution:
```
"""====================================================================================
====================================================================================
___ _______ ___ _______ ___ ___
| /\ | | \ | | / | | | | |\ /|
| / \ | | \ | | / | | | | | \ / |
|___ /____\ | | \ | |/ |___| | | | \/ |
| / \ | | / | |\ |\ | | | |
| / \ | | / | | \ | \ | | | |
___|/ \___|___ |___/ ___|___ | \ | \ |___| | |
====================================================================================
====================================================================================
"""
# ♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥
print("INTERCAL")
# ♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥
"""====================================================================================
====================================================================================
___ _______ ___ _______ ___ ___
| /\ | | \ | | / | | | | |\ /|
| / \ | | \ | | / | | | | | \ / |
|___ /____\ | | \ | |/ |___| | | | \/ |
| / \ | | / | |\ |\ | | | |
| / \ | | / | | \ | \ | | | |
___|/ \___|___ |___/ ___|___ | \ | \ |___| | |
====================================================================================
====================================================================================
"""
```
| 50,752
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given a mysterious language (codenamed "Secret") available in "Custom Test" tab. Find out what this language is and write a program which outputs its name. Note that the program must be written in this language.
Input
This program has only one test, and it's empty (it doesn't give your program anything to read).
Output
Output the name of the mysterious language.
Examples
Tags: *special
Correct Solution:
```
n=input();print("INTERCAL")
```
| 50,753
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given a mysterious language (codenamed "Secret") available in "Custom Test" tab. Find out what this language is and write a program which outputs its name. Note that the program must be written in this language.
Input
This program has only one test, and it's empty (it doesn't give your program anything to read).
Output
Output the name of the mysterious language.
Examples
Tags: *special
Correct Solution:
```
n=input()
print("INTERCAL")
```
| 50,754
|
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0.814453125,
0.345947265625,
0.27734375,
0.22900390625,
-0.60595703125,
-0.1785888671875
] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given a mysterious language (codenamed "Secret") available in "Custom Test" tab. Find out what this language is and write a program which outputs its name. Note that the program must be written in this language.
Input
This program has only one test, and it's empty (it doesn't give your program anything to read).
Output
Output the name of the mysterious language.
Examples
Tags: *special
Correct Solution:
```
#Fun....
print('INTERCAL')
```
| 50,755
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Little penguin Polo adores strings. But most of all he adores strings of length n.
One day he wanted to find a string that meets the following conditions:
1. The string consists of n lowercase English letters (that is, the string's length equals n), exactly k of these letters are distinct.
2. No two neighbouring letters of a string coincide; that is, if we represent a string as s = s1s2... sn, then the following inequality holds, si ≠ si + 1(1 ≤ i < n).
3. Among all strings that meet points 1 and 2, the required string is lexicographically smallest.
Help him find such string or state that such string doesn't exist.
String x = x1x2... xp is lexicographically less than string y = y1y2... yq, if either p < q and x1 = y1, x2 = y2, ... , xp = yp, or there is such number r (r < p, r < q), that x1 = y1, x2 = y2, ... , xr = yr and xr + 1 < yr + 1. The characters of the strings are compared by their ASCII codes.
Input
A single line contains two positive integers n and k (1 ≤ n ≤ 106, 1 ≤ k ≤ 26) — the string's length and the number of distinct letters.
Output
In a single line print the required string. If there isn't such string, print "-1" (without the quotes).
Examples
Input
7 4
Output
ababacd
Input
4 7
Output
-1
Tags: greedy
Correct Solution:
```
def main():
n, k = map(int, input().split())
if n < k or k == 1 < n:
print(-1)
elif (n - k) & 1:
print('ab' * ((n - k + 1) // 2) + 'acdefghijklmnopqrstuvwxyz'[:k - 1])
else:
print('ab' * ((n - k) // 2) + 'abcdefghijklmnopqrstuvwxyz'[:k])
if __name__ == '__main__':
main()
```
| 50,792
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Little penguin Polo adores strings. But most of all he adores strings of length n.
One day he wanted to find a string that meets the following conditions:
1. The string consists of n lowercase English letters (that is, the string's length equals n), exactly k of these letters are distinct.
2. No two neighbouring letters of a string coincide; that is, if we represent a string as s = s1s2... sn, then the following inequality holds, si ≠ si + 1(1 ≤ i < n).
3. Among all strings that meet points 1 and 2, the required string is lexicographically smallest.
Help him find such string or state that such string doesn't exist.
String x = x1x2... xp is lexicographically less than string y = y1y2... yq, if either p < q and x1 = y1, x2 = y2, ... , xp = yp, or there is such number r (r < p, r < q), that x1 = y1, x2 = y2, ... , xr = yr and xr + 1 < yr + 1. The characters of the strings are compared by their ASCII codes.
Input
A single line contains two positive integers n and k (1 ≤ n ≤ 106, 1 ≤ k ≤ 26) — the string's length and the number of distinct letters.
Output
In a single line print the required string. If there isn't such string, print "-1" (without the quotes).
Examples
Input
7 4
Output
ababacd
Input
4 7
Output
-1
Tags: greedy
Correct Solution:
```
n,k=map(int,input().split())
if k>n:
print(-1)
elif n==1 and k==1:
print("a")
elif k==1:
print(-1)
else:
ans=""
k=k-2
n=n-k
z=99
if n%2==0:
ans+="ab"*(n//2)
while(k>0):
ans+=chr(z)
z+=1
k-=1
else:
x=99
ans+="ab"*(n//2)
ans+="a"
while(k>0):
ans += chr(x)
x+= 1
k-=1
print(ans)
```
| 50,794
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
You are solving the crossword problem K from IPSC 2014. You solved all the clues except for one: who does Eevee evolve into? You are not very into pokemons, but quick googling helped you find out, that Eevee can evolve into eight different pokemons: Vaporeon, Jolteon, Flareon, Espeon, Umbreon, Leafeon, Glaceon, and Sylveon.
You know the length of the word in the crossword, and you already know some letters. Designers of the crossword made sure that the answer is unambiguous, so you can assume that exactly one pokemon out of the 8 that Eevee evolves into fits the length and the letters given. Your task is to find it.
Input
First line contains an integer n (6 ≤ n ≤ 8) – the length of the string.
Next line contains a string consisting of n characters, each of which is either a lower case english letter (indicating a known letter) or a dot character (indicating an empty cell in the crossword).
Output
Print a name of the pokemon that Eevee can evolve into that matches the pattern in the input. Use lower case letters only to print the name (in particular, do not capitalize the first letter).
Examples
Input
7
j......
Output
jolteon
Input
7
...feon
Output
leafeon
Input
7
.l.r.o.
Output
flareon
Note
Here's a set of names in a form you can paste into your solution:
["vaporeon", "jolteon", "flareon", "espeon", "umbreon", "leafeon", "glaceon", "sylveon"]
{"vaporeon", "jolteon", "flareon", "espeon", "umbreon", "leafeon", "glaceon", "sylveon"}
Tags: brute force, implementation, strings
Correct Solution:
```
n = int(input())
s = input()
l = ["vaporeon", "jolteon", "flareon", "espeon", "umbreon", "leafeon", "glaceon", "sylveon"]
for given in l:
if len(given) != len(s):
continue
istrue = 1
for i in range(0, n):
if given[i] != s[i] and s[i] != '.':
istrue = 0
break
if (istrue):
print (given)
```
| 50,862
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
You are solving the crossword problem K from IPSC 2014. You solved all the clues except for one: who does Eevee evolve into? You are not very into pokemons, but quick googling helped you find out, that Eevee can evolve into eight different pokemons: Vaporeon, Jolteon, Flareon, Espeon, Umbreon, Leafeon, Glaceon, and Sylveon.
You know the length of the word in the crossword, and you already know some letters. Designers of the crossword made sure that the answer is unambiguous, so you can assume that exactly one pokemon out of the 8 that Eevee evolves into fits the length and the letters given. Your task is to find it.
Input
First line contains an integer n (6 ≤ n ≤ 8) – the length of the string.
Next line contains a string consisting of n characters, each of which is either a lower case english letter (indicating a known letter) or a dot character (indicating an empty cell in the crossword).
Output
Print a name of the pokemon that Eevee can evolve into that matches the pattern in the input. Use lower case letters only to print the name (in particular, do not capitalize the first letter).
Examples
Input
7
j......
Output
jolteon
Input
7
...feon
Output
leafeon
Input
7
.l.r.o.
Output
flareon
Note
Here's a set of names in a form you can paste into your solution:
["vaporeon", "jolteon", "flareon", "espeon", "umbreon", "leafeon", "glaceon", "sylveon"]
{"vaporeon", "jolteon", "flareon", "espeon", "umbreon", "leafeon", "glaceon", "sylveon"}
Tags: brute force, implementation, strings
Correct Solution:
```
'''input
7
.l.r.o.
'''
n = int(input())
s = input()
l = [i for i in ["vaporeon", "jolteon", "flareon", "espeon", "umbreon", "leafeon", "glaceon", "sylveon"] if len(i) == n]
for x in l:
for y in range(n):
if all(s[y] == x[y] for y in range(n) if s[y] != "."):
print(x)
break
```
| 50,863
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
You are solving the crossword problem K from IPSC 2014. You solved all the clues except for one: who does Eevee evolve into? You are not very into pokemons, but quick googling helped you find out, that Eevee can evolve into eight different pokemons: Vaporeon, Jolteon, Flareon, Espeon, Umbreon, Leafeon, Glaceon, and Sylveon.
You know the length of the word in the crossword, and you already know some letters. Designers of the crossword made sure that the answer is unambiguous, so you can assume that exactly one pokemon out of the 8 that Eevee evolves into fits the length and the letters given. Your task is to find it.
Input
First line contains an integer n (6 ≤ n ≤ 8) – the length of the string.
Next line contains a string consisting of n characters, each of which is either a lower case english letter (indicating a known letter) or a dot character (indicating an empty cell in the crossword).
Output
Print a name of the pokemon that Eevee can evolve into that matches the pattern in the input. Use lower case letters only to print the name (in particular, do not capitalize the first letter).
Examples
Input
7
j......
Output
jolteon
Input
7
...feon
Output
leafeon
Input
7
.l.r.o.
Output
flareon
Note
Here's a set of names in a form you can paste into your solution:
["vaporeon", "jolteon", "flareon", "espeon", "umbreon", "leafeon", "glaceon", "sylveon"]
{"vaporeon", "jolteon", "flareon", "espeon", "umbreon", "leafeon", "glaceon", "sylveon"}
Tags: brute force, implementation, strings
Correct Solution:
```
n = int(input())
s = input()
a = ["vaporeon", "jolteon", "flareon", "espeon", "umbreon", "leafeon", "glaceon", "sylveon"]
for i in a:
if (len(i) != len(s)):
continue
b = True
for j in range(len(s)):
if (s[j] != '.' and i[j] != '.' and s[j] != i[j]):
b = False
if b:
print(i)
exit(0)
```
| 50,864
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
You are solving the crossword problem K from IPSC 2014. You solved all the clues except for one: who does Eevee evolve into? You are not very into pokemons, but quick googling helped you find out, that Eevee can evolve into eight different pokemons: Vaporeon, Jolteon, Flareon, Espeon, Umbreon, Leafeon, Glaceon, and Sylveon.
You know the length of the word in the crossword, and you already know some letters. Designers of the crossword made sure that the answer is unambiguous, so you can assume that exactly one pokemon out of the 8 that Eevee evolves into fits the length and the letters given. Your task is to find it.
Input
First line contains an integer n (6 ≤ n ≤ 8) – the length of the string.
Next line contains a string consisting of n characters, each of which is either a lower case english letter (indicating a known letter) or a dot character (indicating an empty cell in the crossword).
Output
Print a name of the pokemon that Eevee can evolve into that matches the pattern in the input. Use lower case letters only to print the name (in particular, do not capitalize the first letter).
Examples
Input
7
j......
Output
jolteon
Input
7
...feon
Output
leafeon
Input
7
.l.r.o.
Output
flareon
Note
Here's a set of names in a form you can paste into your solution:
["vaporeon", "jolteon", "flareon", "espeon", "umbreon", "leafeon", "glaceon", "sylveon"]
{"vaporeon", "jolteon", "flareon", "espeon", "umbreon", "leafeon", "glaceon", "sylveon"}
Tags: brute force, implementation, strings
Correct Solution:
```
#!/usr/bin/env python3
import re
def main():
input()
p = re.compile(input())
pokemons = ["vaporeon", "jolteon", "flareon", "espeon", "umbreon", "leafeon", "glaceon", "sylveon"]
pokemons = sorted(pokemons, key=len)
for x in pokemons:
if p.match(x):
print(x)
break
if __name__ == '__main__':
main()
```
| 50,865
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
You are solving the crossword problem K from IPSC 2014. You solved all the clues except for one: who does Eevee evolve into? You are not very into pokemons, but quick googling helped you find out, that Eevee can evolve into eight different pokemons: Vaporeon, Jolteon, Flareon, Espeon, Umbreon, Leafeon, Glaceon, and Sylveon.
You know the length of the word in the crossword, and you already know some letters. Designers of the crossword made sure that the answer is unambiguous, so you can assume that exactly one pokemon out of the 8 that Eevee evolves into fits the length and the letters given. Your task is to find it.
Input
First line contains an integer n (6 ≤ n ≤ 8) – the length of the string.
Next line contains a string consisting of n characters, each of which is either a lower case english letter (indicating a known letter) or a dot character (indicating an empty cell in the crossword).
Output
Print a name of the pokemon that Eevee can evolve into that matches the pattern in the input. Use lower case letters only to print the name (in particular, do not capitalize the first letter).
Examples
Input
7
j......
Output
jolteon
Input
7
...feon
Output
leafeon
Input
7
.l.r.o.
Output
flareon
Note
Here's a set of names in a form you can paste into your solution:
["vaporeon", "jolteon", "flareon", "espeon", "umbreon", "leafeon", "glaceon", "sylveon"]
{"vaporeon", "jolteon", "flareon", "espeon", "umbreon", "leafeon", "glaceon", "sylveon"}
Tags: brute force, implementation, strings
Correct Solution:
```
l_6 = ["espeon"]
l_7 = ["jolteon", "flareon", "umbreon", "leafeon", "glaceon", "sylveon"]
l_8 = ["vaporeon"]
input_length = input()
input_string = input()
if input_length == "6":
print(l_6[0])
elif input_length == "8":
print(l_8[0])
else:
for x in l_7:
for y in range(0,7):
if(input_string[y] != '.' and input_string[y] != x[y]):
break
if (y == 6):
print(x)
```
| 50,866
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
You are solving the crossword problem K from IPSC 2014. You solved all the clues except for one: who does Eevee evolve into? You are not very into pokemons, but quick googling helped you find out, that Eevee can evolve into eight different pokemons: Vaporeon, Jolteon, Flareon, Espeon, Umbreon, Leafeon, Glaceon, and Sylveon.
You know the length of the word in the crossword, and you already know some letters. Designers of the crossword made sure that the answer is unambiguous, so you can assume that exactly one pokemon out of the 8 that Eevee evolves into fits the length and the letters given. Your task is to find it.
Input
First line contains an integer n (6 ≤ n ≤ 8) – the length of the string.
Next line contains a string consisting of n characters, each of which is either a lower case english letter (indicating a known letter) or a dot character (indicating an empty cell in the crossword).
Output
Print a name of the pokemon that Eevee can evolve into that matches the pattern in the input. Use lower case letters only to print the name (in particular, do not capitalize the first letter).
Examples
Input
7
j......
Output
jolteon
Input
7
...feon
Output
leafeon
Input
7
.l.r.o.
Output
flareon
Note
Here's a set of names in a form you can paste into your solution:
["vaporeon", "jolteon", "flareon", "espeon", "umbreon", "leafeon", "glaceon", "sylveon"]
{"vaporeon", "jolteon", "flareon", "espeon", "umbreon", "leafeon", "glaceon", "sylveon"}
Tags: brute force, implementation, strings
Correct Solution:
```
def match(s, p):
if len(s) != len(p):
return False
for chs, chp in zip(s, p):
if chs != '.' and chs != chp:
return False
return True
n = int(input())
s = input()
for p in ['vaporeon', 'jolteon', 'flareon', 'espeon', 'umbreon', 'leafeon', 'glaceon', 'sylveon'\
]:
if match(s, p):
print(p)
```
| 50,867
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
You are solving the crossword problem K from IPSC 2014. You solved all the clues except for one: who does Eevee evolve into? You are not very into pokemons, but quick googling helped you find out, that Eevee can evolve into eight different pokemons: Vaporeon, Jolteon, Flareon, Espeon, Umbreon, Leafeon, Glaceon, and Sylveon.
You know the length of the word in the crossword, and you already know some letters. Designers of the crossword made sure that the answer is unambiguous, so you can assume that exactly one pokemon out of the 8 that Eevee evolves into fits the length and the letters given. Your task is to find it.
Input
First line contains an integer n (6 ≤ n ≤ 8) – the length of the string.
Next line contains a string consisting of n characters, each of which is either a lower case english letter (indicating a known letter) or a dot character (indicating an empty cell in the crossword).
Output
Print a name of the pokemon that Eevee can evolve into that matches the pattern in the input. Use lower case letters only to print the name (in particular, do not capitalize the first letter).
Examples
Input
7
j......
Output
jolteon
Input
7
...feon
Output
leafeon
Input
7
.l.r.o.
Output
flareon
Note
Here's a set of names in a form you can paste into your solution:
["vaporeon", "jolteon", "flareon", "espeon", "umbreon", "leafeon", "glaceon", "sylveon"]
{"vaporeon", "jolteon", "flareon", "espeon", "umbreon", "leafeon", "glaceon", "sylveon"}
Tags: brute force, implementation, strings
Correct Solution:
```
import sys
def get_single_int ():
return int (sys.stdin.readline ().strip ())
def get_string ():
return sys.stdin.readline ().strip ()
def get_ints ():
return map (int, sys.stdin.readline ().strip ().split ())
def get_list ():
return list (map (int, sys.stdin.readline ().strip ().split ()))
#code starts here
def unique (n) :
if n == 8:
print ("vaporeon")
else:
print ("espeon")
def same (names):
for j in names:
if j [i] != s [i]:
try:
names_copy.remove (j)
except:
continue
n = get_single_int ()
s = get_string ()
names = [ "jolteon", "flareon", "umbreon", "leafeon", "glaceon", "sylveon"]
names_copy = [ "jolteon", "flareon", "umbreon", "leafeon", "glaceon", "sylveon"]
if (n == 6 or n == 8):
unique (n)
else :
for i in range (7):
if s [i] == '.':
continue
else:
same (names)
print (names_copy [0])
```
| 50,868
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
You are solving the crossword problem K from IPSC 2014. You solved all the clues except for one: who does Eevee evolve into? You are not very into pokemons, but quick googling helped you find out, that Eevee can evolve into eight different pokemons: Vaporeon, Jolteon, Flareon, Espeon, Umbreon, Leafeon, Glaceon, and Sylveon.
You know the length of the word in the crossword, and you already know some letters. Designers of the crossword made sure that the answer is unambiguous, so you can assume that exactly one pokemon out of the 8 that Eevee evolves into fits the length and the letters given. Your task is to find it.
Input
First line contains an integer n (6 ≤ n ≤ 8) – the length of the string.
Next line contains a string consisting of n characters, each of which is either a lower case english letter (indicating a known letter) or a dot character (indicating an empty cell in the crossword).
Output
Print a name of the pokemon that Eevee can evolve into that matches the pattern in the input. Use lower case letters only to print the name (in particular, do not capitalize the first letter).
Examples
Input
7
j......
Output
jolteon
Input
7
...feon
Output
leafeon
Input
7
.l.r.o.
Output
flareon
Note
Here's a set of names in a form you can paste into your solution:
["vaporeon", "jolteon", "flareon", "espeon", "umbreon", "leafeon", "glaceon", "sylveon"]
{"vaporeon", "jolteon", "flareon", "espeon", "umbreon", "leafeon", "glaceon", "sylveon"}
Tags: brute force, implementation, strings
Correct Solution:
```
def prov(s2):
global s1
if len(s1)!=len(s2):
return False
for i in range(len(s1)):
if s1[i]!=s2[i] and s1[i]!='.':
return False
print(s2)
exit(0)
n=int(input())
s1=input().strip()
b=["vaporeon", "jolteon", "flareon", "espeon", "umbreon", "leafeon", "glaceon", "sylveon"]
for i in b:
prov(i)
```
| 50,869
|
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] | 6
|
Provide a correct Python 3 solution for this coding contest problem.
Boolean Expression Compressor
You are asked to build a compressor for Boolean expressions that transforms expressions to the shortest form keeping their meaning.
The grammar of the Boolean expressions has terminals `0` `1` `a` `b` `c` `d` `-` `^` `*` `(` `)`, start symbol <E> and the following production rule:
> <E> ::= `0` | `1` | `a` | `b` | `c` | `d` | `-`<E> | `(`<E>`^`<E>`)` | `(`<E>`*`<E>`)`
Letters `a`, `b`, `c` and `d` represent Boolean variables that have values of either `0` or `1`. Operators are evaluated as shown in the Table below. In other words, `-` means negation (NOT), `^` means exclusive disjunction (XOR), and `*` means logical conjunction (AND).
Table: Evaluations of operators
<image>
Write a program that calculates the length of the shortest expression that evaluates equal to the given expression with whatever values of the four variables.
For example, `0`, that is the first expression in the sample input, cannot be shortened further. Therefore the shortest length for this expression is 1.
For another example, `(a*(1*b))`, the second in the sample input, always evaluates equal to `(a*b)` and `(b*a)`, which are the shortest. The output for this expression, thus, should be `5`.
Input
The input consists of multiple datasets. A dataset consists of one line, containing an expression conforming to the grammar described above. The length of the expression is less than or equal to 16 characters.
The end of the input is indicated by a line containing one `.` (period). The number of datasets in the input is at most 200.
Output
For each dataset, output a single line containing an integer which is the length of the shortest expression that has the same value as the given expression for all combinations of values in the variables.
Sample Input
0
(a*(1*b))
(1^a)
(-(-a*-b)*a)
(a^(b^(c^d)))
.
Output for the Sample Input
1
5
2
1
13
Example
Input
0
(a*(1*b))
(1^a)
(-(-a*-b)*a)
(a^(b^(c^d)))
.
Output
1
5
2
1
13
"Correct Solution:
```
a=65280; b=61680; c=52428; d=43690; e=65535
QS = [[] for i in range(17)]
QS[1] = [a, b, c, d]
L = {a: 1, b: 1, c: 1, d: 1, e: 1, e: 1, 0: 1}
H = []
get = L.get
push = H.append
for l in range(1, 16):
Q = QS[l]
li = 13-l; l3 = l+3; l1 = l+1
pop = Q.pop
pushQN = QS[l1].append
while Q:
p = pop()
if L[p] < l: continue
if l1 < get(p ^ e, 17):
L[p ^ e] = l1
l < 12 and pushQN(p ^ e)
if l < 13:
for q, r in H:
if r < li:
if l3+r < get(p & q, 17): L[p & q] = l3+r; QS[l3+r].append(p & q)
if l3+r < get(p ^ q, 17): L[p ^ q] = l3+r; QS[l3+r].append(p ^ q)
elif r == li:
if p & q not in L: L[p & q] = 16
if p ^ q not in L: L[p ^ q] = 16
else: break
if l < 7: push((p, l))
print(*map(L.__getitem__, eval("e&"+",e&".join(open(0).read().replace(*"-~").replace(*"*&").replace(*"1e").split()[:-1]))),sep='\n')
```
| 51,248
|
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|
Provide a correct Python 3 solution for this coding contest problem.
Boolean Expression Compressor
You are asked to build a compressor for Boolean expressions that transforms expressions to the shortest form keeping their meaning.
The grammar of the Boolean expressions has terminals `0` `1` `a` `b` `c` `d` `-` `^` `*` `(` `)`, start symbol <E> and the following production rule:
> <E> ::= `0` | `1` | `a` | `b` | `c` | `d` | `-`<E> | `(`<E>`^`<E>`)` | `(`<E>`*`<E>`)`
Letters `a`, `b`, `c` and `d` represent Boolean variables that have values of either `0` or `1`. Operators are evaluated as shown in the Table below. In other words, `-` means negation (NOT), `^` means exclusive disjunction (XOR), and `*` means logical conjunction (AND).
Table: Evaluations of operators
<image>
Write a program that calculates the length of the shortest expression that evaluates equal to the given expression with whatever values of the four variables.
For example, `0`, that is the first expression in the sample input, cannot be shortened further. Therefore the shortest length for this expression is 1.
For another example, `(a*(1*b))`, the second in the sample input, always evaluates equal to `(a*b)` and `(b*a)`, which are the shortest. The output for this expression, thus, should be `5`.
Input
The input consists of multiple datasets. A dataset consists of one line, containing an expression conforming to the grammar described above. The length of the expression is less than or equal to 16 characters.
The end of the input is indicated by a line containing one `.` (period). The number of datasets in the input is at most 200.
Output
For each dataset, output a single line containing an integer which is the length of the shortest expression that has the same value as the given expression for all combinations of values in the variables.
Sample Input
0
(a*(1*b))
(1^a)
(-(-a*-b)*a)
(a^(b^(c^d)))
.
Output for the Sample Input
1
5
2
1
13
Example
Input
0
(a*(1*b))
(1^a)
(-(-a*-b)*a)
(a^(b^(c^d)))
.
Output
1
5
2
1
13
"Correct Solution:
```
def calc(s):
def parse(a, b, c, d):
nonlocal cur
g = s[cur]; cur += 1
if g == '-':
return 1 ^ parse(a, b, c, d)
if g == '(':
p = parse(a, b, c, d)
cmd = s[cur]; cur += 1
q = parse(a, b, c, d)
cur += 1 # ')'
return p ^ q if cmd == '^' else p & q
return eval(g)
res = 0
for b in range(16):
cur = 0
if parse(*map(int, format(b, '04b'))):
res += 1 << b
return res
base = "abcd10"
L = {}
for e in base:
state = calc(e)
L[state] = 1
ALL = 2**16-1
MAX = 10**18
for i in range(6):
R = dict(L)
for p in R:
if R[p] < 16:
L[p ^ ALL] = min(L.get(p ^ ALL, MAX), R[p] + 1)
if R[p]+3 < 16:
for q in R:
if R[p] + R[q] + 3 <= 16:
L[p & q] = min(L.get(p & q, MAX), R[p] + R[q] + 3)
L[p ^ q] = min(L.get(p ^ q, MAX), R[p] + R[q] + 3)
while 1:
s = input()
if s == '.':
break
print(L[calc(s)])
```
| 51,249
|
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] | 6
|
Provide a correct Python 3 solution for this coding contest problem.
Boolean Expression Compressor
You are asked to build a compressor for Boolean expressions that transforms expressions to the shortest form keeping their meaning.
The grammar of the Boolean expressions has terminals `0` `1` `a` `b` `c` `d` `-` `^` `*` `(` `)`, start symbol <E> and the following production rule:
> <E> ::= `0` | `1` | `a` | `b` | `c` | `d` | `-`<E> | `(`<E>`^`<E>`)` | `(`<E>`*`<E>`)`
Letters `a`, `b`, `c` and `d` represent Boolean variables that have values of either `0` or `1`. Operators are evaluated as shown in the Table below. In other words, `-` means negation (NOT), `^` means exclusive disjunction (XOR), and `*` means logical conjunction (AND).
Table: Evaluations of operators
<image>
Write a program that calculates the length of the shortest expression that evaluates equal to the given expression with whatever values of the four variables.
For example, `0`, that is the first expression in the sample input, cannot be shortened further. Therefore the shortest length for this expression is 1.
For another example, `(a*(1*b))`, the second in the sample input, always evaluates equal to `(a*b)` and `(b*a)`, which are the shortest. The output for this expression, thus, should be `5`.
Input
The input consists of multiple datasets. A dataset consists of one line, containing an expression conforming to the grammar described above. The length of the expression is less than or equal to 16 characters.
The end of the input is indicated by a line containing one `.` (period). The number of datasets in the input is at most 200.
Output
For each dataset, output a single line containing an integer which is the length of the shortest expression that has the same value as the given expression for all combinations of values in the variables.
Sample Input
0
(a*(1*b))
(1^a)
(-(-a*-b)*a)
(a^(b^(c^d)))
.
Output for the Sample Input
1
5
2
1
13
Example
Input
0
(a*(1*b))
(1^a)
(-(-a*-b)*a)
(a^(b^(c^d)))
.
Output
1
5
2
1
13
"Correct Solution:
```
a=65280; b=61680; c=52428; d=43690; e=65535
L = {el: 1 for el in [a, b, c, d, e, 0]}
for i in range(6):
R = sorted(L.items(), key=lambda x: x[1])
for p, l in R:
if l < 16:
L[p ^ e] = min(L.get(p ^ e, 16), l+1)
if l+3 < 16:
for q, r in R:
if l+r+3 <= 16:
L[p & q] = min(L.get(p & q, 16), l+r+3)
L[p ^ q] = min(L.get(p ^ q, 16), l+r+3)
else: break
else: break
print(*(L[e & eval(s)] for s in open(0).read().replace(*"-~").replace(*"*&").replace(*"1e").split()[:-1]),sep='\n')
```
| 51,250
|
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|
Provide a correct Python 3 solution for this coding contest problem.
Boolean Expression Compressor
You are asked to build a compressor for Boolean expressions that transforms expressions to the shortest form keeping their meaning.
The grammar of the Boolean expressions has terminals `0` `1` `a` `b` `c` `d` `-` `^` `*` `(` `)`, start symbol <E> and the following production rule:
> <E> ::= `0` | `1` | `a` | `b` | `c` | `d` | `-`<E> | `(`<E>`^`<E>`)` | `(`<E>`*`<E>`)`
Letters `a`, `b`, `c` and `d` represent Boolean variables that have values of either `0` or `1`. Operators are evaluated as shown in the Table below. In other words, `-` means negation (NOT), `^` means exclusive disjunction (XOR), and `*` means logical conjunction (AND).
Table: Evaluations of operators
<image>
Write a program that calculates the length of the shortest expression that evaluates equal to the given expression with whatever values of the four variables.
For example, `0`, that is the first expression in the sample input, cannot be shortened further. Therefore the shortest length for this expression is 1.
For another example, `(a*(1*b))`, the second in the sample input, always evaluates equal to `(a*b)` and `(b*a)`, which are the shortest. The output for this expression, thus, should be `5`.
Input
The input consists of multiple datasets. A dataset consists of one line, containing an expression conforming to the grammar described above. The length of the expression is less than or equal to 16 characters.
The end of the input is indicated by a line containing one `.` (period). The number of datasets in the input is at most 200.
Output
For each dataset, output a single line containing an integer which is the length of the shortest expression that has the same value as the given expression for all combinations of values in the variables.
Sample Input
0
(a*(1*b))
(1^a)
(-(-a*-b)*a)
(a^(b^(c^d)))
.
Output for the Sample Input
1
5
2
1
13
Example
Input
0
(a*(1*b))
(1^a)
(-(-a*-b)*a)
(a^(b^(c^d)))
.
Output
1
5
2
1
13
"Correct Solution:
```
a=65280; b=61680; c=52428; d=43690; e=65535
def calc(s):
res = eval(s.replace("-", "~").replace("*", "&").replace("1", "e"))
return e ^ ~res if res < 0 else res
base = [a, b, c, d, e, 0]
L = {el: 1 for el in base}
for i in range(6):
R = dict(L)
for p in R:
if R[p] < 16:
L[p ^ e] = min(L.get(p ^ e, 16), R[p] + 1)
if R[p]+3 < 16:
for q in R:
if R[p] + R[q] + 3 <= 16:
L[p & q] = min(L.get(p & q, 16), R[p] + R[q] + 3)
L[p ^ q] = min(L.get(p ^ q, 16), R[p] + R[q] + 3)
while 1:
s = input()
if s == '.':
break
print(L[calc(s)])
```
| 51,251
|
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] | 6
|
Provide a correct Python 3 solution for this coding contest problem.
Boolean Expression Compressor
You are asked to build a compressor for Boolean expressions that transforms expressions to the shortest form keeping their meaning.
The grammar of the Boolean expressions has terminals `0` `1` `a` `b` `c` `d` `-` `^` `*` `(` `)`, start symbol <E> and the following production rule:
> <E> ::= `0` | `1` | `a` | `b` | `c` | `d` | `-`<E> | `(`<E>`^`<E>`)` | `(`<E>`*`<E>`)`
Letters `a`, `b`, `c` and `d` represent Boolean variables that have values of either `0` or `1`. Operators are evaluated as shown in the Table below. In other words, `-` means negation (NOT), `^` means exclusive disjunction (XOR), and `*` means logical conjunction (AND).
Table: Evaluations of operators
<image>
Write a program that calculates the length of the shortest expression that evaluates equal to the given expression with whatever values of the four variables.
For example, `0`, that is the first expression in the sample input, cannot be shortened further. Therefore the shortest length for this expression is 1.
For another example, `(a*(1*b))`, the second in the sample input, always evaluates equal to `(a*b)` and `(b*a)`, which are the shortest. The output for this expression, thus, should be `5`.
Input
The input consists of multiple datasets. A dataset consists of one line, containing an expression conforming to the grammar described above. The length of the expression is less than or equal to 16 characters.
The end of the input is indicated by a line containing one `.` (period). The number of datasets in the input is at most 200.
Output
For each dataset, output a single line containing an integer which is the length of the shortest expression that has the same value as the given expression for all combinations of values in the variables.
Sample Input
0
(a*(1*b))
(1^a)
(-(-a*-b)*a)
(a^(b^(c^d)))
.
Output for the Sample Input
1
5
2
1
13
Example
Input
0
(a*(1*b))
(1^a)
(-(-a*-b)*a)
(a^(b^(c^d)))
.
Output
1
5
2
1
13
"Correct Solution:
```
a=65280; b=61680; c=52428; d=43690; e=65535
from heapq import heappush, heappop
base = [a, b, c, d, e, 0]
Q = [(1, el) for el in base]
L = {el: 1 for el in base}
H = []
while Q:
l, p = heappop(Q)
if L[p] < l: continue
if l+1 < L.get(p ^ e, 17):
L[p^e] = l+1
if l+1 < 16: heappush(Q, (l+1, p^e))
if l+3 < 16:
for q, r in H:
if l+r+3 <= 16:
if l+r+3 < L.get(p & q, 17):
L[p & q] = l+r+3
if l+r+3 < 16: heappush(Q, (l+r+3, p & q))
if l+r+3 < L.get(p ^ q, 17):
L[p ^ q] = l+r+3
if l+r+3 < 16: heappush(Q, (l+r+3, p ^ q))
else: break
if l < 7: H.append((p, l))
print(*(L[e & eval(s)] for s in open(0).read().replace(*"-~").replace(*"*&").replace(*"1e").split()[:-1]),sep='\n')
```
| 51,252
|
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] | 6
|
Provide a correct Python 3 solution for this coding contest problem.
Boolean Expression Compressor
You are asked to build a compressor for Boolean expressions that transforms expressions to the shortest form keeping their meaning.
The grammar of the Boolean expressions has terminals `0` `1` `a` `b` `c` `d` `-` `^` `*` `(` `)`, start symbol <E> and the following production rule:
> <E> ::= `0` | `1` | `a` | `b` | `c` | `d` | `-`<E> | `(`<E>`^`<E>`)` | `(`<E>`*`<E>`)`
Letters `a`, `b`, `c` and `d` represent Boolean variables that have values of either `0` or `1`. Operators are evaluated as shown in the Table below. In other words, `-` means negation (NOT), `^` means exclusive disjunction (XOR), and `*` means logical conjunction (AND).
Table: Evaluations of operators
<image>
Write a program that calculates the length of the shortest expression that evaluates equal to the given expression with whatever values of the four variables.
For example, `0`, that is the first expression in the sample input, cannot be shortened further. Therefore the shortest length for this expression is 1.
For another example, `(a*(1*b))`, the second in the sample input, always evaluates equal to `(a*b)` and `(b*a)`, which are the shortest. The output for this expression, thus, should be `5`.
Input
The input consists of multiple datasets. A dataset consists of one line, containing an expression conforming to the grammar described above. The length of the expression is less than or equal to 16 characters.
The end of the input is indicated by a line containing one `.` (period). The number of datasets in the input is at most 200.
Output
For each dataset, output a single line containing an integer which is the length of the shortest expression that has the same value as the given expression for all combinations of values in the variables.
Sample Input
0
(a*(1*b))
(1^a)
(-(-a*-b)*a)
(a^(b^(c^d)))
.
Output for the Sample Input
1
5
2
1
13
Example
Input
0
(a*(1*b))
(1^a)
(-(-a*-b)*a)
(a^(b^(c^d)))
.
Output
1
5
2
1
13
"Correct Solution:
```
a=65280; b=61680; c=52428; d=43690; e=65535
from heapq import heappush, heappop
base = [a, b, c, d, e, 0]
Q = [(1, el) for el in base]
L = {el: 1 for el in base}
H = []
get = L.get
push = H.append
while Q:
l, p = heappop(Q)
if L[p] < l: continue
if l+1 < get(p ^ e, 17):
L[p ^ e] = l+1
if l+1 < 16: heappush(Q, (l+1, p ^ e))
if l+3 < 16:
for q, r in H:
if l+r+3 <= 16:
if l+r+3 < get(p & q, 17):
L[p & q] = l+r+3
if l+r+3 < 16: heappush(Q, (l+r+3, p & q))
if l+r+3 < get(p ^ q, 17):
L[p ^ q] = l+r+3
if l+r+3 < 16: heappush(Q, (l+r+3, p ^ q))
else: break
if l < 7: push((p, l))
print(*map(L.__getitem__, eval("e&%s"%",e&".join(open(0).read().replace(*"-~").replace(*"*&").replace(*"1e").split()[:-1]))),sep='\n')
```
| 51,253
|
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] | 6
|
Provide a correct Python 3 solution for this coding contest problem.
Boolean Expression Compressor
You are asked to build a compressor for Boolean expressions that transforms expressions to the shortest form keeping their meaning.
The grammar of the Boolean expressions has terminals `0` `1` `a` `b` `c` `d` `-` `^` `*` `(` `)`, start symbol <E> and the following production rule:
> <E> ::= `0` | `1` | `a` | `b` | `c` | `d` | `-`<E> | `(`<E>`^`<E>`)` | `(`<E>`*`<E>`)`
Letters `a`, `b`, `c` and `d` represent Boolean variables that have values of either `0` or `1`. Operators are evaluated as shown in the Table below. In other words, `-` means negation (NOT), `^` means exclusive disjunction (XOR), and `*` means logical conjunction (AND).
Table: Evaluations of operators
<image>
Write a program that calculates the length of the shortest expression that evaluates equal to the given expression with whatever values of the four variables.
For example, `0`, that is the first expression in the sample input, cannot be shortened further. Therefore the shortest length for this expression is 1.
For another example, `(a*(1*b))`, the second in the sample input, always evaluates equal to `(a*b)` and `(b*a)`, which are the shortest. The output for this expression, thus, should be `5`.
Input
The input consists of multiple datasets. A dataset consists of one line, containing an expression conforming to the grammar described above. The length of the expression is less than or equal to 16 characters.
The end of the input is indicated by a line containing one `.` (period). The number of datasets in the input is at most 200.
Output
For each dataset, output a single line containing an integer which is the length of the shortest expression that has the same value as the given expression for all combinations of values in the variables.
Sample Input
0
(a*(1*b))
(1^a)
(-(-a*-b)*a)
(a^(b^(c^d)))
.
Output for the Sample Input
1
5
2
1
13
Example
Input
0
(a*(1*b))
(1^a)
(-(-a*-b)*a)
(a^(b^(c^d)))
.
Output
1
5
2
1
13
"Correct Solution:
```
a=65280; b=61680; c=52428; d=43690; e=65535
QS = [[] for i in range(17)]
QS[1] = [a, b, c, d]
L = {a: 1, b: 1, c: 1, d: 1, e: 1, e: 1, 0: 1}
H = []
get = L.get
push = H.append
for l in range(1, 16):
Q = QS[l]
QN = QS[l+1]
while Q:
p = Q.pop()
if L[p] < l: continue
if l+1 < get(p ^ e, 17):
L[p ^ e] = l+1
l < 15 and QN.append(p ^ e)
if l < 13:
li = 13-l; l3 = 3+l
for q, r in H:
if r < li:
k = p & q
if r < get(k, 17)-l3: L[k] = l3+r; QS[l3+r].append(k)
k = p ^ q
if r < get(k, 17)-l3: L[k] = l3+r; QS[l3+r].append(k)
elif r == li:
if p & q not in L: L[p & q] = 16
if p ^ q not in L: L[p ^ q] = 16
else: break
if l < 7: push((p, l))
print(*map(L.__getitem__, eval("e&"+",e&".join(open(0).read().replace(*"-~").replace(*"*&").replace(*"1e").split()[:-1]))),sep='\n')
```
| 51,254
|
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] | 6
|
Provide a correct Python 3 solution for this coding contest problem.
Boolean Expression Compressor
You are asked to build a compressor for Boolean expressions that transforms expressions to the shortest form keeping their meaning.
The grammar of the Boolean expressions has terminals `0` `1` `a` `b` `c` `d` `-` `^` `*` `(` `)`, start symbol <E> and the following production rule:
> <E> ::= `0` | `1` | `a` | `b` | `c` | `d` | `-`<E> | `(`<E>`^`<E>`)` | `(`<E>`*`<E>`)`
Letters `a`, `b`, `c` and `d` represent Boolean variables that have values of either `0` or `1`. Operators are evaluated as shown in the Table below. In other words, `-` means negation (NOT), `^` means exclusive disjunction (XOR), and `*` means logical conjunction (AND).
Table: Evaluations of operators
<image>
Write a program that calculates the length of the shortest expression that evaluates equal to the given expression with whatever values of the four variables.
For example, `0`, that is the first expression in the sample input, cannot be shortened further. Therefore the shortest length for this expression is 1.
For another example, `(a*(1*b))`, the second in the sample input, always evaluates equal to `(a*b)` and `(b*a)`, which are the shortest. The output for this expression, thus, should be `5`.
Input
The input consists of multiple datasets. A dataset consists of one line, containing an expression conforming to the grammar described above. The length of the expression is less than or equal to 16 characters.
The end of the input is indicated by a line containing one `.` (period). The number of datasets in the input is at most 200.
Output
For each dataset, output a single line containing an integer which is the length of the shortest expression that has the same value as the given expression for all combinations of values in the variables.
Sample Input
0
(a*(1*b))
(1^a)
(-(-a*-b)*a)
(a^(b^(c^d)))
.
Output for the Sample Input
1
5
2
1
13
Example
Input
0
(a*(1*b))
(1^a)
(-(-a*-b)*a)
(a^(b^(c^d)))
.
Output
1
5
2
1
13
"Correct Solution:
```
a=65280; b=61680; c=52428; d=43690; e=65535
from heapq import heappush, heappop
base = [a, b, c, d, e, 0]
Q = [(1, el) for el in base]
L = {el: 1 for el in base}
H = []
while Q:
l, p = heappop(Q)
if L[p] < l: continue
if l+1 < L.get(p ^ e, 17):
L[p ^ e] = l+1
if l+1 < 16: heappush(Q, (l+1, p ^ e))
if l+3 < 16:
for q, r in H:
if l+r+3 <= 16:
if l+r+3 < L.get(p & q, 17):
L[p & q] = l+r+3
if l+r+3 < 16: heappush(Q, (l+r+3, p & q))
if l+r+3 < L.get(p ^ q, 17):
L[p ^ q] = l+r+3
if l+r+3 < 16: heappush(Q, (l+r+3, p ^ q))
else: break
if l < 7: H.append((p, l))
print(*map(L.__getitem__, eval("e&%s"%",e&".join(open(0).read().replace(*"-~").replace(*"*&").replace(*"1e").split()[:-1]))),sep='\n')
```
| 51,255
|
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|
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