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Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
The country of Reberland is the archenemy of Berland. Recently the authorities of Berland arrested a Reberlandian spy who tried to bring the leaflets intended for agitational propaganda to Berland illegally . The most leaflets contain substrings of the Absolutely Inadmissible Swearword and maybe even the whole word.
Berland legal system uses the difficult algorithm in order to determine the guilt of the spy. The main part of this algorithm is the following procedure.
All the m leaflets that are brought by the spy are numbered from 1 to m. After that it's needed to get the answer to q queries of the following kind: "In which leaflet in the segment of numbers [l, r] the substring of the Absolutely Inadmissible Swearword [pl, pr] occurs more often?".
The expert wants you to automate that procedure because this time texts of leaflets are too long. Help him!
Input
The first line contains the string s (1 ≤ |s| ≤ 5·105) — the Absolutely Inadmissible Swearword. The string s consists of only lowercase English letters.
The second line contains the only integer m (1 ≤ m ≤ 5·104) — the number of texts of leaflets for expertise.
Each of the next m lines contains the only string ti — the text of the i-th leaflet. The sum of lengths of all leaflet texts doesn't exceed 5·104. The text of the leaflets consists of only lowercase English letters.
The next line contains integer q (1 ≤ q ≤ 5·105) — the number of queries for expertise.
Finally, each of the last q lines contains four integers l, r, pl, pr (1 ≤ l ≤ r ≤ m, 1 ≤ pl ≤ pr ≤ |s|), where |s| is the length of the Absolutely Inadmissible Swearword.
Output
Print q lines. The i-th of them should contain two integers — the number of the text with the most occurences and the number of occurences of the substring [pl, pr] of the string s. If there are several text numbers print the smallest one.
Examples
Input
suffixtree
3
suffixtreesareawesome
cartesiantreeisworsethansegmenttree
nyeeheeheee
2
1 2 1 10
1 3 9 10
Output
1 1
3 4
Submitted Solution:
```
s = input()
m = int(input())
t = []
for i in range(m):
t.append(input())
m = int(input())
data = []
for i in range(m):
data.append(list(map(int,input().split())))
for q in data:
sub = s[q[2]-1: q[3]]
maximo = 0
lo = len(s)
index = q[0]-1
for i in range(q[0]-1,q[1]):
temp = t[i]
contador = 0
for j in range(len(temp)+1 - len(sub)):
if sub == temp[j:j+len(sub)]:
contador+=1
if contador == 0:
maximo = contador
index = i + 1
contador = 0
lo = len(temp)
elif contador==maximo and len(temp)<=lo:
maximo = contador
index = i + 1
contador = 0
lo = len(temp)
elif contador>= maximo:
maximo = contador
index = i + 1
contador = 0
lo = len(temp)
print(index, maximo)
```
No
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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.
The country of Reberland is the archenemy of Berland. Recently the authorities of Berland arrested a Reberlandian spy who tried to bring the leaflets intended for agitational propaganda to Berland illegally . The most leaflets contain substrings of the Absolutely Inadmissible Swearword and maybe even the whole word.
Berland legal system uses the difficult algorithm in order to determine the guilt of the spy. The main part of this algorithm is the following procedure.
All the m leaflets that are brought by the spy are numbered from 1 to m. After that it's needed to get the answer to q queries of the following kind: "In which leaflet in the segment of numbers [l, r] the substring of the Absolutely Inadmissible Swearword [pl, pr] occurs more often?".
The expert wants you to automate that procedure because this time texts of leaflets are too long. Help him!
Input
The first line contains the string s (1 ≤ |s| ≤ 5·105) — the Absolutely Inadmissible Swearword. The string s consists of only lowercase English letters.
The second line contains the only integer m (1 ≤ m ≤ 5·104) — the number of texts of leaflets for expertise.
Each of the next m lines contains the only string ti — the text of the i-th leaflet. The sum of lengths of all leaflet texts doesn't exceed 5·104. The text of the leaflets consists of only lowercase English letters.
The next line contains integer q (1 ≤ q ≤ 5·105) — the number of queries for expertise.
Finally, each of the last q lines contains four integers l, r, pl, pr (1 ≤ l ≤ r ≤ m, 1 ≤ pl ≤ pr ≤ |s|), where |s| is the length of the Absolutely Inadmissible Swearword.
Output
Print q lines. The i-th of them should contain two integers — the number of the text with the most occurences and the number of occurences of the substring [pl, pr] of the string s. If there are several text numbers print the smallest one.
Examples
Input
suffixtree
3
suffixtreesareawesome
cartesiantreeisworsethansegmenttree
nyeeheeheee
2
1 2 1 10
1 3 9 10
Output
1 1
3 4
Submitted Solution:
```
import re
leaflets = []
queries = []
def handleString(data):
"""String data to compare in the leaflets"""
for query in queries:
count = 0
nomin = 1
iterval = 0
tdata = data[query[2]-1:query[3]]
for strdata in leaflets[query[0]-1:query[1]]:
temp = start = 0
iterval = iterval + 1
while True:
start = strdata.find(tdata, start) + 1
if start > 0:
temp = temp + 1
else:
break
if temp > count:
count = temp
nomin = iterval
print("{0} {1}".format(nomin, count))
def main():
data = input()
leaflet_count = int(input())
for i in range(leaflet_count):
leaflets.append(input())
query_count = int(input())
for j in range(query_count):
query_data = input()
queries.append(list(map(int, query_data.split())))
handleString(data)
if __name__ == '__main__':
main()
```
No
| 21,638
|
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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:
```
a=input()
b=input()
c=[int(i)-1 for i in input().split()]
l=0;r=len(a)
while r-l>1:
m=l+(r-l)//2
d=list(a)
j=0
for i in range(m):
d[c[i]]=''
# print(d,i)
for i in range(len(a)):
if d[i]==b[j]:
# print(d)
j+=1
if j==len(b):
l=m;break
if j!=len(b):r=m
print(l)
```
| 21,661
|
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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:
```
import math as mt
import sys,string
input=sys.stdin.readline
import random
from collections import deque,defaultdict
L=lambda : list(map(int,input().split()))
Ls=lambda : list(input().split())
M=lambda : map(int,input().split())
I=lambda :int(input())
def isSubseq(s,b,v):
i=0
j=0
while(i<len(s) and j<len(b)):
if(s[i]==b[j] and v[i]==1):
j+=1
i+=1
else:
i+=1
if(j==len(b)):
return True
else:
return False
a=input().strip()
b=input().strip()
s=L()
l=0
ans=0
h=len(a)
while(l<=h):
t=mt.ceil((l+h)/2)
v=[1 for j in range(len(a))]
for i in range(t):
v[s[i]-1]=0
if(isSubseq(a,b,v)):
#print(t,"P")
ans=t
l=t+1
else:
h=t-1
print(ans)
```
| 21,662
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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:
```
a = input()
b = input()
c = [i-1 for i in list(map(int,input().split()))]
l = 0
r = len(a)
while r-l>1:
m = l + (r-l) // 2
d = list(a)
j = 0
for i in range(m):d[c[i]] = ''
for i in range(len(a)):
if d[i]==b[j]:
j += 1
if j == len(b):
l = m
break
if j!=len(b):
r = m
print(l)
```
| 21,663
|
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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:
```
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)
```
| 21,664
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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 subset(S,s):
i = 0
j = 0
while i<len(S) and j<len(s):
if S[i]==s[j]:
i+=1
j+=1
else: i+=1
if j==len(s):
return True
return False
n = input()
a = input()
arr = [int(x)-1 for x in input().split()]
new = []
l = 0
r = len(n)
while l<r:
mid = (l+r+1)//2
sa = arr[:mid]
new = list(n)
for i in sa: new[i] = ''
if subset(''.join(new),a):
l = mid
else:
r = mid-1
print(r)
```
| 21,665
|
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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)
```
| 21,666
|
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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:
```
"""
NTC here
"""
import sys
inp = sys.stdin.readline
def input(): return inp().strip()
# flush= sys.stdout.flush
# import threading
# sys.setrecursionlimit(10**6)
# threading.stack_size(2**26)
def iin(): return int(input())
def lin(): return list(map(int, input().split()))
def main():
p, t = input(), input()
a = lin()
n = len(p)
def check(x):
rm = set(a[:x])
#print(rm)
p1 = [p[i] for i in range(n) if i+1 not in rm]
#print(p1, t)
dc = {}
for i, j in enumerate(p1):
try:
dc[j].append(i)
except:
dc[j] = [i]
for i in dc:
dc[i] = dc[i][::-1]
pv = -1
for i in t:
if i in dc:
while dc[i]:
ch = dc[i].pop()
if ch > pv:
pv = ch
break
else:
return False
else:
return False
return True
ans = 0
left, right = 0, n-1
while left < right:
#print(left, right)
md = (left+right+1) >> 1
if check(md):
#print("SOL - ", md)
ans = max(md, ans)
left = md
else:
#print('wrong ', md)
right = md - 1
print(ans)
main()
# threading.Thread(target=main).start()
```
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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:
```
from sys import stdin
t = input().strip()
p = input().strip()
def possible(pos):
it = 0
ip = 0
while it < len(t) and ip < len(p):
if it in d:
it += 1
continue
if t[it] == p[ip]:
it += 1
ip += 1
else:
it += 1
if ip == len(p):
return True
else:
return False
a = [int(x)-1 for x in stdin.readline().split()]
l = 0
r = len(t) - len(p)
d = set()
while l < r:
mid = (l + r) // 2
if len(d) < (mid + 1):
for i in range(len(d), mid + 1):
d.add(a[i])
else:
for i in range(mid + 1, len(d), 1):
d.discard(a[i])
if possible(mid):
l = mid + 1
else:
r = mid
print(l)
```
| 21,668
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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 as bl #c++ lowerbound bl(array,element)
#from bisect import bisect_right as br #c++ upperbound br(array,element)
#from __future__ import print_function, division #while using python2
def modinv(n,p):
return pow(n,p-2,p)
def is_present(parent, child):
m = 0
i = 0
j = 0
lc = len(child)
lp = len(parent)
while i < len(child) and j < len(parent):
while i < lc and j < lp and child[i] == parent[j]:
i += 1
j += 1
m += 1
while i < lc and j < lp and parent[j] != child[i]:
j += 1
return m == len(child)
def main():
#sys.stdin = open('input.txt', 'r')
#sys.stdout = open('output.txt', 'w')
t = input()
p = input()
moves = [int(x) for x in input().split()]
l = 0
r = len(moves) - 1
ans_s = []
while r > l:
m = (r+l)//2
removed = set(moves[:m+1])
# print(l, r, m)
# print(removed)
# input()
new_s = []
for i in range(len(t)):
if i+1 not in removed:
new_s.append(t[i])
if is_present(new_s, p):
ans_s = new_s
l = m+1
else:
r = m
if(is_present(ans_s, p)):
print(len(t) - len(ans_s))
else:
print(0)
#------------------ Python 2 and 3 footer by Pajenegod and c1729-----------------------------------------
py2 = round(0.5)
if py2:
from future_builtins import ascii, filter, hex, map, oct, zip
range = xrange
import os, sys
from io import IOBase, BytesIO
BUFSIZE = 8192
class FastIO(BytesIO):
newlines = 0
def __init__(self, file):
self._file = file
self._fd = file.fileno()
self.writable = "x" in file.mode or "w" in file.mode
self.write = super(FastIO, self).write if self.writable else None
def _fill(self):
s = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
self.seek((self.tell(), self.seek(0,2), super(FastIO, self).write(s))[0])
return s
def read(self):
while self._fill(): pass
return super(FastIO,self).read()
def readline(self):
while self.newlines == 0:
s = self._fill(); self.newlines = s.count(b"\n") + (not s)
self.newlines -= 1
return super(FastIO, self).readline()
def flush(self):
if self.writable:
os.write(self._fd, self.getvalue())
self.truncate(0), self.seek(0)
class IOWrapper(IOBase):
def __init__(self, file):
self.buffer = FastIO(file)
self.flush = self.buffer.flush
self.writable = self.buffer.writable
if py2:
self.write = self.buffer.write
self.read = self.buffer.read
self.readline = self.buffer.readline
else:
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')
if __name__ == '__main__':
main()
```
Yes
| 21,669
|
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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()
c=[i-1 for i in list(map(int,input().split()))]
l=0
r=len(a)
while r-l>1 :
m=l+(r-l)//2#two pointer
d=list(a)
j=0
for o in range(m):#first half delete value replace with ""
d[c[o]]=""
for i in range(int(len(a))):
if(d[i]==b[j]):
j+=1
if(j==len(b)):
l=m
break
if(j!=len(b)):r=m
print(l)
```
Yes
| 21,670
|
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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:
```
#------------------------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
| 21,671
|
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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 binaryFind():
c = [0]*lenp
maxlen = 0
for i in range(0,mid):
c[a[i]-1]=1
for i in range(0,lenp):
if c[i]==0:
if p[i]==t[maxlen]:
maxlen+=1
if maxlen==lent:
return True
return False
p = input()
t = input()
a = list(map(int,input().split()))
lenp = len(p)
lent = len(t)
l=0
r=lenp
while l<=r:
mid = (l+r)//2
isok = binaryFind()
if isok==True:
l = mid+1
else :
r = mid-1
print(l-1)
```
Yes
| 21,672
|
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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:
```
#!/usr/bin/env python3
from sys import stdin,stdout
import re
import bisect
bisect
def ri():
return map(int, input().split())
t = input()
p = input()
a = list(ri())
p = ".*".join(p)
ptrn = re.compile(p)
tt = list(t[:])
tt[a[0]] = ''
if not ptrn.search("".join(tt)):
print(0)
exit()
s = 0
e = len(a)-1
while True:
m = s + (e-s)//2
ii = [0]*len(t)
tt = []
for i in range(m+1):
ii[a[i]-1] = 1
for i in range(len(t)):
if ii[i] == 0:
tt.append(t[i])
if ptrn.search("".join(tt)):
s = m
else:
e = m
if e-s == 1:
print(s+1)
exit()
```
No
| 21,673
|
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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 mi():
return map(int, input().split())
s = list(input())
t = input()
a = list(map(int, input().split()))
def isSubSequence(str1,str2,m,n):
j = 0 # Index of str1
i = 0 # Index of str2
# Traverse both str1 and str2
# Compare current character of str2 with
# first unmatched character of str1
# If matched, then move ahead in str1
while j<m and i<n:
if str1[j] == str2[i]:
j = j+1
i = i + 1
# If all characters of str1 matched, then j is equal to m
return j==m
l = len(a)
high = l
low = 0
bestans = -1
while low<high:
mid = (low+high)//2
b = a.copy()
s1 = s.copy()
for i in range(mid):
s1[b[i]-1] = ''
s1 = ''.join(s1)
if isSubSequence(t,s1,len(t),len(s1)):
low = mid+1
bestans = max(bestans,mid)
else:
high = mid-1
print (bestans)
```
No
| 21,674
|
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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:
```
#!/usr/bin/env python3
from sys import stdin,stdout
import re
import bisect
bisect
def ri():
return map(int, input().split())
t = input()
p = input()
a = list(ri())
p = ".*".join(p)
ptrn = re.compile(p)
tt = list(t[:])
tt[a[0]] = ''
if not ptrn.search("".join(tt)):
print("come here")
print(0)
exit()
s = 0
e = len(a)-1
while True:
m = s + (e-s)//2
ii = [0]*len(t)
tt = []
for i in range(m+1):
ii[a[i]-1] = 1
for i in range(len(t)):
if ii[i] == 0:
tt.append(t[i])
if ptrn.search("".join(tt)):
s = m
else:
e = m
if e-s == 1:
print(s+1)
exit()
```
No
| 21,675
|
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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:
```
def mi():
return map(int, input().split())
s = list(input())
t = input()
a = list(map(int, input().split()))
def isSubSequence(str1,str2,m,n):
j = 0 # Index of str1
i = 0 # Index of str2
# Traverse both str1 and str2
# Compare current character of str2 with
# first unmatched character of str1
# If matched, then move ahead in str1
while j<m and i<n:
if str1[j] == str2[i]:
j = j+1
i = i + 1
# If all characters of str1 matched, then j is equal to m
return j==m
l = len(a)
high = l
low = 0
bestans = -1
while low<high:
mid = (low+high)//2
b = a.copy()
s1 = s.copy()
for i in range(mid):
s1[b[i]-1] = ''
s1 = ''.join(s1)
if s1.find(t)>-1:
low = mid+1
bestans = max(bestans,mid)
else:
if isSubSequence(t,s1,len(t),len(s1)):
low = mid+1
else:
high = mid
print (bestans)
```
No
| 21,676
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
What are you doing at the end of the world? Are you busy? Will you save us?
<image>
Nephren is playing a game with little leprechauns.
She gives them an infinite array of strings, f0... ∞.
f0 is "What are you doing at the end of the world? Are you busy? Will you save us?".
She wants to let more people know about it, so she defines fi = "What are you doing while sending "fi - 1"? Are you busy? Will you send "fi - 1"?" for all i ≥ 1.
For example, f1 is
"What are you doing while sending "What are you doing at the end of the world? Are you busy? Will you save us?"? Are you busy? Will you send "What are you doing at the end of the world? Are you busy? Will you save us?"?". Note that the quotes in the very beginning and in the very end are for clarity and are not a part of f1.
It can be seen that the characters in fi are letters, question marks, (possibly) quotation marks and spaces.
Nephren will ask the little leprechauns q times. Each time she will let them find the k-th character of fn. The characters are indexed starting from 1. If fn consists of less than k characters, output '.' (without quotes).
Can you answer her queries?
Input
The first line contains one integer q (1 ≤ q ≤ 10) — the number of Nephren's questions.
Each of the next q lines describes Nephren's question and contains two integers n and k (0 ≤ n ≤ 105, 1 ≤ k ≤ 1018).
Output
One line containing q characters. The i-th character in it should be the answer for the i-th query.
Examples
Input
3
1 1
1 2
1 111111111111
Output
Wh.
Input
5
0 69
1 194
1 139
0 47
1 66
Output
abdef
Input
10
4 1825
3 75
3 530
4 1829
4 1651
3 187
4 584
4 255
4 774
2 474
Output
Areyoubusy
Note
For the first two examples, refer to f0 and f1 given in the legend.
Tags: binary search, dfs and similar
Correct Solution:
```
f0 = "What are you doing at the end of the world? Are you busy? Will you save us?"
f1 = "What are you doing while sending \"{0}\"? Are you busy? Will you send \"{0}\"?"
a = list(f1.split("{0}"))
b = list(map(len, a))
q = int(input())
f = lambda n: 143 * 2**min(n, 54) - 68
for _ in range(q):
n, k = map(int, input().split())
ans = ""
while n > 0 and b[0] < k < b[0] + f(n-1):
k -= b[0]
n -= 1
while not ans:
w = f(n-1)
if k > f(n):
ans = "."
elif n == 0:
ans = f0[k-1]
elif k <= b[0]:
ans = a[0][k-1]
elif k <= b[0] + w:
k -= b[0]
n -= 1
elif k <= b[0] + w + b[1]:
k -= b[0] + w
ans = a[1][k-1]
elif k <= b[0] + w + b[1] + w:
k -= b[0] + w + b[1]
n -= 1
else:
k -= b[0] + w + b[1] + w
ans = a[2][k-1]
print(ans, end="")
```
| 21,705
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
What are you doing at the end of the world? Are you busy? Will you save us?
<image>
Nephren is playing a game with little leprechauns.
She gives them an infinite array of strings, f0... ∞.
f0 is "What are you doing at the end of the world? Are you busy? Will you save us?".
She wants to let more people know about it, so she defines fi = "What are you doing while sending "fi - 1"? Are you busy? Will you send "fi - 1"?" for all i ≥ 1.
For example, f1 is
"What are you doing while sending "What are you doing at the end of the world? Are you busy? Will you save us?"? Are you busy? Will you send "What are you doing at the end of the world? Are you busy? Will you save us?"?". Note that the quotes in the very beginning and in the very end are for clarity and are not a part of f1.
It can be seen that the characters in fi are letters, question marks, (possibly) quotation marks and spaces.
Nephren will ask the little leprechauns q times. Each time she will let them find the k-th character of fn. The characters are indexed starting from 1. If fn consists of less than k characters, output '.' (without quotes).
Can you answer her queries?
Input
The first line contains one integer q (1 ≤ q ≤ 10) — the number of Nephren's questions.
Each of the next q lines describes Nephren's question and contains two integers n and k (0 ≤ n ≤ 105, 1 ≤ k ≤ 1018).
Output
One line containing q characters. The i-th character in it should be the answer for the i-th query.
Examples
Input
3
1 1
1 2
1 111111111111
Output
Wh.
Input
5
0 69
1 194
1 139
0 47
1 66
Output
abdef
Input
10
4 1825
3 75
3 530
4 1829
4 1651
3 187
4 584
4 255
4 774
2 474
Output
Areyoubusy
Note
For the first two examples, refer to f0 and f1 given in the legend.
Tags: binary search, dfs and similar
Correct Solution:
```
s0 = 'What are you doing at the end of the world? Are you busy? Will you save us?'
s1 = 'What are you doing while sending "'
s2 = '"? Are you busy? Will you send "'
l0 = len(s0)
l1 = len(s1)
l2 = len(s2)
def get(h):
if h > 55: return 10**20
return (l0 + l1 + l2 + 2 << h) - l1 - l2 - 2
def solve(n, k):
if get(n) <= k: return '.'
while True:
if n == 0: return s0[k]
if k < l1: return s1[k]
k -= l1
if k < get(n-1):
n -= 1
continue
k -= get(n-1)
if k < l2: return s2[k]
k -= l2
if k < get(n-1): n -=1
else: return '"?'[k - get(n - 1)]
q = int(input())
for i in range(q):
n,k=list(map(int,input().split()))
print(solve(n,k-1),end='')
```
| 21,706
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
What are you doing at the end of the world? Are you busy? Will you save us?
<image>
Nephren is playing a game with little leprechauns.
She gives them an infinite array of strings, f0... ∞.
f0 is "What are you doing at the end of the world? Are you busy? Will you save us?".
She wants to let more people know about it, so she defines fi = "What are you doing while sending "fi - 1"? Are you busy? Will you send "fi - 1"?" for all i ≥ 1.
For example, f1 is
"What are you doing while sending "What are you doing at the end of the world? Are you busy? Will you save us?"? Are you busy? Will you send "What are you doing at the end of the world? Are you busy? Will you save us?"?". Note that the quotes in the very beginning and in the very end are for clarity and are not a part of f1.
It can be seen that the characters in fi are letters, question marks, (possibly) quotation marks and spaces.
Nephren will ask the little leprechauns q times. Each time she will let them find the k-th character of fn. The characters are indexed starting from 1. If fn consists of less than k characters, output '.' (without quotes).
Can you answer her queries?
Input
The first line contains one integer q (1 ≤ q ≤ 10) — the number of Nephren's questions.
Each of the next q lines describes Nephren's question and contains two integers n and k (0 ≤ n ≤ 105, 1 ≤ k ≤ 1018).
Output
One line containing q characters. The i-th character in it should be the answer for the i-th query.
Examples
Input
3
1 1
1 2
1 111111111111
Output
Wh.
Input
5
0 69
1 194
1 139
0 47
1 66
Output
abdef
Input
10
4 1825
3 75
3 530
4 1829
4 1651
3 187
4 584
4 255
4 774
2 474
Output
Areyoubusy
Note
For the first two examples, refer to f0 and f1 given in the legend.
Tags: binary search, dfs and similar
Correct Solution:
```
import sys
sys.setrecursionlimit(1500)
s1 = "What are you doing at the end of the world? Are you busy? Will you save us?"
a = "What are you doing while sending \""
b = "\"? Are you busy? Will you send \""
c = "\"?"
ans = ""
def solve(n, k):
if n == 0:
if k >= len(s1):
return "."
else:
return s1[k]
if k < len(a):
return a[k]
k -= len(a)
prev_len = (2 ** (n - 1) - 1) * (len(a) + len(b) + len(c)) + (2 ** (n - 1)) * len(s1)
if k < prev_len:
return solve(n - 1, k)
k -= prev_len
if k < len(b):
return b[k]
k -= len(b)
if k < prev_len:
return solve(n - 1, k)
k -= prev_len
if k < len(c):
return c[k]
else:
return "."
for _ in range(int(input())):
n, k = list(map(int, input().split()))
k -= 1
if n > 65:
m = n - 65
if k < len(a) * m:
ans += a[k % len(a)]
continue
k -= len(a) * m
n = n - m
ans += solve(n, k)
print(ans)
```
| 21,707
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
What are you doing at the end of the world? Are you busy? Will you save us?
<image>
Nephren is playing a game with little leprechauns.
She gives them an infinite array of strings, f0... ∞.
f0 is "What are you doing at the end of the world? Are you busy? Will you save us?".
She wants to let more people know about it, so she defines fi = "What are you doing while sending "fi - 1"? Are you busy? Will you send "fi - 1"?" for all i ≥ 1.
For example, f1 is
"What are you doing while sending "What are you doing at the end of the world? Are you busy? Will you save us?"? Are you busy? Will you send "What are you doing at the end of the world? Are you busy? Will you save us?"?". Note that the quotes in the very beginning and in the very end are for clarity and are not a part of f1.
It can be seen that the characters in fi are letters, question marks, (possibly) quotation marks and spaces.
Nephren will ask the little leprechauns q times. Each time she will let them find the k-th character of fn. The characters are indexed starting from 1. If fn consists of less than k characters, output '.' (without quotes).
Can you answer her queries?
Input
The first line contains one integer q (1 ≤ q ≤ 10) — the number of Nephren's questions.
Each of the next q lines describes Nephren's question and contains two integers n and k (0 ≤ n ≤ 105, 1 ≤ k ≤ 1018).
Output
One line containing q characters. The i-th character in it should be the answer for the i-th query.
Examples
Input
3
1 1
1 2
1 111111111111
Output
Wh.
Input
5
0 69
1 194
1 139
0 47
1 66
Output
abdef
Input
10
4 1825
3 75
3 530
4 1829
4 1651
3 187
4 584
4 255
4 774
2 474
Output
Areyoubusy
Note
For the first two examples, refer to f0 and f1 given in the legend.
Tags: binary search, dfs and similar
Correct Solution:
```
def get_len(ind):
if ind > 63:
ind = 63
k = (1 << ind) - 1
return k * (len1 + len2 + len3) + (k + 1) * len_f0
f0 = 'What are you doing at the end of the world? Are you busy? Will you save us?'
s1 = 'What are you doing while sending "'
s2 = '"? Are you busy? Will you send "'
s3 = '"?'
len_f0 = len(f0)
len1 = len(s1)
len2 = len(s2)
len3 = len(s3)
q = int(input())
for i in range(q):
n, k = map(int, input().split())
k -= 1
l = 0; ind = n - 1
while True:
if k < l + len_f0 and ind == -1:
print(f0[k - l], end='')
break
elif k < l + len1:
print(s1[k - l], end='')
break
elif ind >= 0 and k < l + len1 + get_len(ind):
l += len1
ind = ind - 1
elif ind >= 0 and k < l + len1 + get_len(ind) + len2:
print(s2[k - l - len1 - get_len(ind)], end='')
break
elif ind >= 0 and k < l + len1 + get_len(ind) + len2 + get_len(ind):
l += len1 + get_len(ind) + len2
ind = ind - 1
elif ind >= 0 and k < l + len1 + get_len(ind) + len2 + get_len(ind) + len3:
print(s3[k - l - len1 - get_len(ind) - len2 - get_len(ind)], end='')
break
else:
print('.', end='')
break
```
| 21,708
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
What are you doing at the end of the world? Are you busy? Will you save us?
<image>
Nephren is playing a game with little leprechauns.
She gives them an infinite array of strings, f0... ∞.
f0 is "What are you doing at the end of the world? Are you busy? Will you save us?".
She wants to let more people know about it, so she defines fi = "What are you doing while sending "fi - 1"? Are you busy? Will you send "fi - 1"?" for all i ≥ 1.
For example, f1 is
"What are you doing while sending "What are you doing at the end of the world? Are you busy? Will you save us?"? Are you busy? Will you send "What are you doing at the end of the world? Are you busy? Will you save us?"?". Note that the quotes in the very beginning and in the very end are for clarity and are not a part of f1.
It can be seen that the characters in fi are letters, question marks, (possibly) quotation marks and spaces.
Nephren will ask the little leprechauns q times. Each time she will let them find the k-th character of fn. The characters are indexed starting from 1. If fn consists of less than k characters, output '.' (without quotes).
Can you answer her queries?
Input
The first line contains one integer q (1 ≤ q ≤ 10) — the number of Nephren's questions.
Each of the next q lines describes Nephren's question and contains two integers n and k (0 ≤ n ≤ 105, 1 ≤ k ≤ 1018).
Output
One line containing q characters. The i-th character in it should be the answer for the i-th query.
Examples
Input
3
1 1
1 2
1 111111111111
Output
Wh.
Input
5
0 69
1 194
1 139
0 47
1 66
Output
abdef
Input
10
4 1825
3 75
3 530
4 1829
4 1651
3 187
4 584
4 255
4 774
2 474
Output
Areyoubusy
Note
For the first two examples, refer to f0 and f1 given in the legend.
Tags: binary search, dfs and similar
Correct Solution:
```
f0 = "What are you doing at the end of the world? Are you busy? Will you save us?"
p1 = "What are you doing while sending \""
p2 = "\"? Are you busy? Will you send \""
p3 = "\"?"
f = []
def dfs(n, k):
if k > f[n]: return '.'
if n == 0: return f0[k-1]
if k <= 34: return p1[k-1]
if k <= f[n-1] + 34: return dfs(n - 1, k - 34)
if k <= f[n-1] + 66: return p2[k - f[n-1] - 34 - 1]
if k <= 2 * f[n-1] + 66: return dfs(n - 1, k - f[n-1] - 66)
return p3[k - f[n-1] * 2 - 66 - 1]
f.append(75)
cnt = 0
for i in range(0, 100):
f.append(f[cnt] * 2 + 68)
cnt += 1
def solve():
n, k =map(int, input().split(' '))
while n > 56 and k > 34:
k -= 34
n -= 1
if k <= 34:
print(p1[k - 1], end='')
else:
print(dfs(n, k), end='')
def main():
case = 1
case = int(input())
for case in range(case):
solve()
main()
```
| 21,709
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
What are you doing at the end of the world? Are you busy? Will you save us?
<image>
Nephren is playing a game with little leprechauns.
She gives them an infinite array of strings, f0... ∞.
f0 is "What are you doing at the end of the world? Are you busy? Will you save us?".
She wants to let more people know about it, so she defines fi = "What are you doing while sending "fi - 1"? Are you busy? Will you send "fi - 1"?" for all i ≥ 1.
For example, f1 is
"What are you doing while sending "What are you doing at the end of the world? Are you busy? Will you save us?"? Are you busy? Will you send "What are you doing at the end of the world? Are you busy? Will you save us?"?". Note that the quotes in the very beginning and in the very end are for clarity and are not a part of f1.
It can be seen that the characters in fi are letters, question marks, (possibly) quotation marks and spaces.
Nephren will ask the little leprechauns q times. Each time she will let them find the k-th character of fn. The characters are indexed starting from 1. If fn consists of less than k characters, output '.' (without quotes).
Can you answer her queries?
Input
The first line contains one integer q (1 ≤ q ≤ 10) — the number of Nephren's questions.
Each of the next q lines describes Nephren's question and contains two integers n and k (0 ≤ n ≤ 105, 1 ≤ k ≤ 1018).
Output
One line containing q characters. The i-th character in it should be the answer for the i-th query.
Examples
Input
3
1 1
1 2
1 111111111111
Output
Wh.
Input
5
0 69
1 194
1 139
0 47
1 66
Output
abdef
Input
10
4 1825
3 75
3 530
4 1829
4 1651
3 187
4 584
4 255
4 774
2 474
Output
Areyoubusy
Note
For the first two examples, refer to f0 and f1 given in the legend.
Tags: binary search, dfs and similar
Correct Solution:
```
import sys
sys.setrecursionlimit(1001000)
ants = "What are you doing while sending \""
ant = len(ants)
meios = "\"? Are you busy? Will you send \""
meio = len(meios)
fims = "\"?"
fim = len(fims)
base = "What are you doing at the end of the world? Are you busy? Will you save us?"
f = [0]
f[0] = len(base)
for i in range(1,100001):
f.append(2*f[i-1] + ant + meio + fim)
if(f[i] >= int(1e18) + 10):
f[i] = int(1e18) + 10
def busca(n,k):
while True:
if n == 0:
if k > len(base):
return "."
else:
return base[k-1]
if k <= ant:
return ants[k-1]
k -= ant
if k <= f[n-1]:
n-=1
continue
k -= f[n-1]
if k <= meio:
return meios[k-1]
k -= meio
if k <= f[n-1]:
n -= 1
continue
k -= f[n-1]
if k <= fim:
return fims[k-1]
return "."
def main():
q = int(input())
for i in range(0,q):
n,k = map(int, input().split())
print (busca(n,k), end='')
print()
main()
```
| 21,710
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
What are you doing at the end of the world? Are you busy? Will you save us?
<image>
Nephren is playing a game with little leprechauns.
She gives them an infinite array of strings, f0... ∞.
f0 is "What are you doing at the end of the world? Are you busy? Will you save us?".
She wants to let more people know about it, so she defines fi = "What are you doing while sending "fi - 1"? Are you busy? Will you send "fi - 1"?" for all i ≥ 1.
For example, f1 is
"What are you doing while sending "What are you doing at the end of the world? Are you busy? Will you save us?"? Are you busy? Will you send "What are you doing at the end of the world? Are you busy? Will you save us?"?". Note that the quotes in the very beginning and in the very end are for clarity and are not a part of f1.
It can be seen that the characters in fi are letters, question marks, (possibly) quotation marks and spaces.
Nephren will ask the little leprechauns q times. Each time she will let them find the k-th character of fn. The characters are indexed starting from 1. If fn consists of less than k characters, output '.' (without quotes).
Can you answer her queries?
Input
The first line contains one integer q (1 ≤ q ≤ 10) — the number of Nephren's questions.
Each of the next q lines describes Nephren's question and contains two integers n and k (0 ≤ n ≤ 105, 1 ≤ k ≤ 1018).
Output
One line containing q characters. The i-th character in it should be the answer for the i-th query.
Examples
Input
3
1 1
1 2
1 111111111111
Output
Wh.
Input
5
0 69
1 194
1 139
0 47
1 66
Output
abdef
Input
10
4 1825
3 75
3 530
4 1829
4 1651
3 187
4 584
4 255
4 774
2 474
Output
Areyoubusy
Note
For the first two examples, refer to f0 and f1 given in the legend.
Tags: binary search, dfs and similar
Correct Solution:
```
tmp = [""] * 3
tmp[0] = "What are you doing while sending \""
tmp[1] = "\"? Are you busy? Will you send \""
tmp[2] = "\"?"
def fun(s):
return tmp[0] + s + tmp[1] + s + tmp[2]
MAX = 60
f = [""] * 3
f[0] = "What are you doing at the end of the world? Are you busy? Will you save us?"
f[1] = fun(f[0])
f[2] = fun(f[1])
l = [0] * (MAX + 1)
l[0] = len(f[0])
l[1] = len(f[1])
l[2] = len(f[2])
for i in range(3, MAX + 1):
l[i] = l[i - 1] * 2 + 68
def solve(n, k):
if n <= MAX and l[n] < k:
return "."
if n <= 2:
return f[n][k - 1]
if n > MAX:
if k > 34 * (n - MAX):
return solve(MAX, k - 34 * (n - MAX))
return tmp[0][(k - 1) % 34]
if k <= 34:
return tmp[0][k - 1]
k -= 34
if k <= l[n - 1]:
return solve(n - 1, k)
k -= l[n - 1]
if k <= 32:
return tmp[1][k - 1]
k -= 32
if k <= l[n - 1]:
return solve(n - 1, k)
k -= l[n - 1]
return tmp[2][k - 1]
q = int(input())
for i in range(q):
nn, kk = map(int, input().split())
print(solve(nn, kk), end="")
print()
```
| 21,711
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
What are you doing at the end of the world? Are you busy? Will you save us?
<image>
Nephren is playing a game with little leprechauns.
She gives them an infinite array of strings, f0... ∞.
f0 is "What are you doing at the end of the world? Are you busy? Will you save us?".
She wants to let more people know about it, so she defines fi = "What are you doing while sending "fi - 1"? Are you busy? Will you send "fi - 1"?" for all i ≥ 1.
For example, f1 is
"What are you doing while sending "What are you doing at the end of the world? Are you busy? Will you save us?"? Are you busy? Will you send "What are you doing at the end of the world? Are you busy? Will you save us?"?". Note that the quotes in the very beginning and in the very end are for clarity and are not a part of f1.
It can be seen that the characters in fi are letters, question marks, (possibly) quotation marks and spaces.
Nephren will ask the little leprechauns q times. Each time she will let them find the k-th character of fn. The characters are indexed starting from 1. If fn consists of less than k characters, output '.' (without quotes).
Can you answer her queries?
Input
The first line contains one integer q (1 ≤ q ≤ 10) — the number of Nephren's questions.
Each of the next q lines describes Nephren's question and contains two integers n and k (0 ≤ n ≤ 105, 1 ≤ k ≤ 1018).
Output
One line containing q characters. The i-th character in it should be the answer for the i-th query.
Examples
Input
3
1 1
1 2
1 111111111111
Output
Wh.
Input
5
0 69
1 194
1 139
0 47
1 66
Output
abdef
Input
10
4 1825
3 75
3 530
4 1829
4 1651
3 187
4 584
4 255
4 774
2 474
Output
Areyoubusy
Note
For the first two examples, refer to f0 and f1 given in the legend.
Tags: binary search, dfs and similar
Correct Solution:
```
s = [
"What are you doing at the end of the world? Are you busy? Will you save us?",
"What are you doing while sending \"",
"\"? Are you busy? Will you send \"",
"\"?"
]
l = list(map(len, s))
ls = [l[0]]
while ls[-1] <= int(1e18):
ls.append(2 * ls[-1] + sum(l[1:]))
ans = ""
q = int(input())
for _ in range(q):
n, k = map(int, input().split())
c = ''
while c == '':
if n < len(ls) and ls[n] < k:
c = '.'
elif n == 0:
c = s[0][k - 1]
elif k <= l[1]:
c = s[1][k - 1]
elif l[1] < k and (len(ls) <= n or k <= l[1] + ls[n - 1]):
k -= l[1]
n -= 1
elif l[1] + ls[n - 1] < k <= l[1] + ls[n - 1] + l[2]:
c = s[2][k - l[1] - ls[n - 1] - 1]
elif l[1] + ls[n - 1] + l[2] < k <= l[1] + ls[n - 1] + l[2] + ls[n - 1]:
k -= l[1] + ls[n - 1] + l[2]
n -= 1
else:
c = s[3][k - ls[n] - 1]
ans += c
print(ans)
```
| 21,712
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Petya loves football very much. One day, as he was watching a football match, he was writing the players' current positions on a piece of paper. To simplify the situation he depicted it as a string consisting of zeroes and ones. A zero corresponds to players of one team; a one corresponds to players of another team. If there are at least 7 players of some team standing one after another, then the situation is considered dangerous. For example, the situation 00100110111111101 is dangerous and 11110111011101 is not. You are given the current situation. Determine whether it is dangerous or not.
Input
The first input line contains a non-empty string consisting of characters "0" and "1", which represents players. The length of the string does not exceed 100 characters. There's at least one player from each team present on the field.
Output
Print "YES" if the situation is dangerous. Otherwise, print "NO".
Examples
Input
001001
Output
NO
Input
1000000001
Output
YES
Tags: implementation, strings
Correct Solution:
```
position=input()
if len(position) <=7:
print("NO")
else:
flag=False
for i in range(len(position)):
if position[i:i+7]=="0000000" or position[i:i+7]=="1111111":
flag=True
break
elif i > len(position)-7:
break
if flag:
print("YES")
else:
print("NO")
```
| 21,742
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Petya loves football very much. One day, as he was watching a football match, he was writing the players' current positions on a piece of paper. To simplify the situation he depicted it as a string consisting of zeroes and ones. A zero corresponds to players of one team; a one corresponds to players of another team. If there are at least 7 players of some team standing one after another, then the situation is considered dangerous. For example, the situation 00100110111111101 is dangerous and 11110111011101 is not. You are given the current situation. Determine whether it is dangerous or not.
Input
The first input line contains a non-empty string consisting of characters "0" and "1", which represents players. The length of the string does not exceed 100 characters. There's at least one player from each team present on the field.
Output
Print "YES" if the situation is dangerous. Otherwise, print "NO".
Examples
Input
001001
Output
NO
Input
1000000001
Output
YES
Tags: implementation, strings
Correct Solution:
```
s=input()
pres,prev,c=0,0,0
for i in s:
pres=int(i)
if pres==prev:
c+=1
prev=pres
if c==7:
print("YES")
break
else:
c=1
prev=pres
if c<7:
print("NO")
```
| 21,744
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Petya loves football very much. One day, as he was watching a football match, he was writing the players' current positions on a piece of paper. To simplify the situation he depicted it as a string consisting of zeroes and ones. A zero corresponds to players of one team; a one corresponds to players of another team. If there are at least 7 players of some team standing one after another, then the situation is considered dangerous. For example, the situation 00100110111111101 is dangerous and 11110111011101 is not. You are given the current situation. Determine whether it is dangerous or not.
Input
The first input line contains a non-empty string consisting of characters "0" and "1", which represents players. The length of the string does not exceed 100 characters. There's at least one player from each team present on the field.
Output
Print "YES" if the situation is dangerous. Otherwise, print "NO".
Examples
Input
001001
Output
NO
Input
1000000001
Output
YES
Tags: implementation, strings
Correct Solution:
```
if __name__ == "__main__":
s = list(char for char in input())
l_old=s[0]
count_one=0
count_zero=0
yes=False
for l in s:
if l == l_old:
if l=="0":
count_zero+=1
count_one=1
#print(f"zeros:{count_zero} ones:{count_one} l:{l} l_old:{l_old}")
else:
count_zero=1
count_one+=1
#print(f"zeros:{count_zero} ones:{count_one} l:{l} l_old:{l_old}")
else:
count_zero=1
count_one=1
l_old=l
if (count_one==7) or (count_zero==7):
yes=True
break
if yes:
print("YES")
else:
print("NO")
```
| 21,746
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Petya loves football very much. One day, as he was watching a football match, he was writing the players' current positions on a piece of paper. To simplify the situation he depicted it as a string consisting of zeroes and ones. A zero corresponds to players of one team; a one corresponds to players of another team. If there are at least 7 players of some team standing one after another, then the situation is considered dangerous. For example, the situation 00100110111111101 is dangerous and 11110111011101 is not. You are given the current situation. Determine whether it is dangerous or not.
Input
The first input line contains a non-empty string consisting of characters "0" and "1", which represents players. The length of the string does not exceed 100 characters. There's at least one player from each team present on the field.
Output
Print "YES" if the situation is dangerous. Otherwise, print "NO".
Examples
Input
001001
Output
NO
Input
1000000001
Output
YES
Tags: implementation, strings
Correct Solution:
```
pat1 = '0000000'
pat2 = '1111111'
string = str(input())
if((pat1 in string) or (pat2 in string)):
print("YES")
else:
print("NO")
```
| 21,747
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
The name of one small but proud corporation consists of n lowercase English letters. The Corporation has decided to try rebranding — an active marketing strategy, that includes a set of measures to change either the brand (both for the company and the goods it produces) or its components: the name, the logo, the slogan. They decided to start with the name.
For this purpose the corporation has consecutively hired m designers. Once a company hires the i-th designer, he immediately contributes to the creation of a new corporation name as follows: he takes the newest version of the name and replaces all the letters xi by yi, and all the letters yi by xi. This results in the new version. It is possible that some of these letters do no occur in the string. It may also happen that xi coincides with yi. The version of the name received after the work of the last designer becomes the new name of the corporation.
Manager Arkady has recently got a job in this company, but is already soaked in the spirit of teamwork and is very worried about the success of the rebranding. Naturally, he can't wait to find out what is the new name the Corporation will receive.
Satisfy Arkady's curiosity and tell him the final version of the name.
Input
The first line of the input contains two integers n and m (1 ≤ n, m ≤ 200 000) — the length of the initial name and the number of designers hired, respectively.
The second line consists of n lowercase English letters and represents the original name of the corporation.
Next m lines contain the descriptions of the designers' actions: the i-th of them contains two space-separated lowercase English letters xi and yi.
Output
Print the new name of the corporation.
Examples
Input
6 1
police
p m
Output
molice
Input
11 6
abacabadaba
a b
b c
a d
e g
f a
b b
Output
cdcbcdcfcdc
Note
In the second sample the name of the corporation consecutively changes as follows:
<image>
<image>
<image>
<image>
<image>
<image>
Tags: implementation, strings
Correct Solution:
```
from sys import *
from collections import *
def inp(n):
if n == 1:
return map(int, stdin.readline().split())
elif n == 2:
return map(float, stdin.readline().split())
else:
return map(str, stdin.readline().split())
def main():
n, m = inp(1)
org, mem = deque(input()), defaultdict(int)
for i in range(m):
u, v = inp(3)
flag1, flag2 = 0, 0
for i, j in mem.items():
if not flag1 and j == u:
mem[i] = v
flag1 = 1
if not flag2 and j == v:
mem[i] = u
flag2 = 1
if flag1 and flag2:
break
if not flag1:
mem[u] = v
if not flag2:
mem[v] = u
# print(mem)
for i in range(n):
if mem[org[i]]:
org[i]=mem[org[i]]
print(''.join(org))
if __name__ == '__main__':
main()
```
| 22,487
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
The name of one small but proud corporation consists of n lowercase English letters. The Corporation has decided to try rebranding — an active marketing strategy, that includes a set of measures to change either the brand (both for the company and the goods it produces) or its components: the name, the logo, the slogan. They decided to start with the name.
For this purpose the corporation has consecutively hired m designers. Once a company hires the i-th designer, he immediately contributes to the creation of a new corporation name as follows: he takes the newest version of the name and replaces all the letters xi by yi, and all the letters yi by xi. This results in the new version. It is possible that some of these letters do no occur in the string. It may also happen that xi coincides with yi. The version of the name received after the work of the last designer becomes the new name of the corporation.
Manager Arkady has recently got a job in this company, but is already soaked in the spirit of teamwork and is very worried about the success of the rebranding. Naturally, he can't wait to find out what is the new name the Corporation will receive.
Satisfy Arkady's curiosity and tell him the final version of the name.
Input
The first line of the input contains two integers n and m (1 ≤ n, m ≤ 200 000) — the length of the initial name and the number of designers hired, respectively.
The second line consists of n lowercase English letters and represents the original name of the corporation.
Next m lines contain the descriptions of the designers' actions: the i-th of them contains two space-separated lowercase English letters xi and yi.
Output
Print the new name of the corporation.
Examples
Input
6 1
police
p m
Output
molice
Input
11 6
abacabadaba
a b
b c
a d
e g
f a
b b
Output
cdcbcdcfcdc
Note
In the second sample the name of the corporation consecutively changes as follows:
<image>
<image>
<image>
<image>
<image>
<image>
Tags: implementation, strings
Correct Solution:
```
n, m = [int(i) for i in input().split()]
s = input()
st = [chr(ord('a')+i) for i in range(26)]
for i in range (m) :
a, b = input().split()
for i in range(26):
if st[i] == a:
st[i] = b
elif st[i] == b:
st[i] = a
print(''.join([ st[ord(i)-ord('a')] for i in s]))
'''RATHER THAN CHANGING LONG STRING WE WILL ONLY CHANG ETHE ALPHABETS AND THEN CHNAGE THE STRING ONLY
ONCE ACCORDING TO ALPHABETS
'''
```
| 22,488
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
The name of one small but proud corporation consists of n lowercase English letters. The Corporation has decided to try rebranding — an active marketing strategy, that includes a set of measures to change either the brand (both for the company and the goods it produces) or its components: the name, the logo, the slogan. They decided to start with the name.
For this purpose the corporation has consecutively hired m designers. Once a company hires the i-th designer, he immediately contributes to the creation of a new corporation name as follows: he takes the newest version of the name and replaces all the letters xi by yi, and all the letters yi by xi. This results in the new version. It is possible that some of these letters do no occur in the string. It may also happen that xi coincides with yi. The version of the name received after the work of the last designer becomes the new name of the corporation.
Manager Arkady has recently got a job in this company, but is already soaked in the spirit of teamwork and is very worried about the success of the rebranding. Naturally, he can't wait to find out what is the new name the Corporation will receive.
Satisfy Arkady's curiosity and tell him the final version of the name.
Input
The first line of the input contains two integers n and m (1 ≤ n, m ≤ 200 000) — the length of the initial name and the number of designers hired, respectively.
The second line consists of n lowercase English letters and represents the original name of the corporation.
Next m lines contain the descriptions of the designers' actions: the i-th of them contains two space-separated lowercase English letters xi and yi.
Output
Print the new name of the corporation.
Examples
Input
6 1
police
p m
Output
molice
Input
11 6
abacabadaba
a b
b c
a d
e g
f a
b b
Output
cdcbcdcfcdc
Note
In the second sample the name of the corporation consecutively changes as follows:
<image>
<image>
<image>
<image>
<image>
<image>
Tags: implementation, strings
Correct Solution:
```
alf = list('abcdefghijklmnopqrstuvwxyz')
n, m = map(int, input().split())
s = input()
for i in range(m):
x, y = input().split()
index1 = alf.index(x)
index2 = alf.index(y)
alf[index1], alf[index2] = alf[index2], alf[index1]
for i in s:
print(alf[ord(i) - ord('a')], end='')
```
| 22,489
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
The name of one small but proud corporation consists of n lowercase English letters. The Corporation has decided to try rebranding — an active marketing strategy, that includes a set of measures to change either the brand (both for the company and the goods it produces) or its components: the name, the logo, the slogan. They decided to start with the name.
For this purpose the corporation has consecutively hired m designers. Once a company hires the i-th designer, he immediately contributes to the creation of a new corporation name as follows: he takes the newest version of the name and replaces all the letters xi by yi, and all the letters yi by xi. This results in the new version. It is possible that some of these letters do no occur in the string. It may also happen that xi coincides with yi. The version of the name received after the work of the last designer becomes the new name of the corporation.
Manager Arkady has recently got a job in this company, but is already soaked in the spirit of teamwork and is very worried about the success of the rebranding. Naturally, he can't wait to find out what is the new name the Corporation will receive.
Satisfy Arkady's curiosity and tell him the final version of the name.
Input
The first line of the input contains two integers n and m (1 ≤ n, m ≤ 200 000) — the length of the initial name and the number of designers hired, respectively.
The second line consists of n lowercase English letters and represents the original name of the corporation.
Next m lines contain the descriptions of the designers' actions: the i-th of them contains two space-separated lowercase English letters xi and yi.
Output
Print the new name of the corporation.
Examples
Input
6 1
police
p m
Output
molice
Input
11 6
abacabadaba
a b
b c
a d
e g
f a
b b
Output
cdcbcdcfcdc
Note
In the second sample the name of the corporation consecutively changes as follows:
<image>
<image>
<image>
<image>
<image>
<image>
Tags: implementation, strings
Correct Solution:
```
import string
def mp():
return map(int,input().split())
def lt():
return list(map(int,input().split()))
def pt(x):
print(x)
n,m = mp()
s = input()
s1 = string.ascii_lowercase
for i in range(m):
L = input().split()
a,b = L[0],L[1]
s1 = s1.translate(str.maketrans(a+b,b+a))
pt(s.translate(str.maketrans(string.ascii_lowercase,s1)))
```
| 22,490
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
The name of one small but proud corporation consists of n lowercase English letters. The Corporation has decided to try rebranding — an active marketing strategy, that includes a set of measures to change either the brand (both for the company and the goods it produces) or its components: the name, the logo, the slogan. They decided to start with the name.
For this purpose the corporation has consecutively hired m designers. Once a company hires the i-th designer, he immediately contributes to the creation of a new corporation name as follows: he takes the newest version of the name and replaces all the letters xi by yi, and all the letters yi by xi. This results in the new version. It is possible that some of these letters do no occur in the string. It may also happen that xi coincides with yi. The version of the name received after the work of the last designer becomes the new name of the corporation.
Manager Arkady has recently got a job in this company, but is already soaked in the spirit of teamwork and is very worried about the success of the rebranding. Naturally, he can't wait to find out what is the new name the Corporation will receive.
Satisfy Arkady's curiosity and tell him the final version of the name.
Input
The first line of the input contains two integers n and m (1 ≤ n, m ≤ 200 000) — the length of the initial name and the number of designers hired, respectively.
The second line consists of n lowercase English letters and represents the original name of the corporation.
Next m lines contain the descriptions of the designers' actions: the i-th of them contains two space-separated lowercase English letters xi and yi.
Output
Print the new name of the corporation.
Examples
Input
6 1
police
p m
Output
molice
Input
11 6
abacabadaba
a b
b c
a d
e g
f a
b b
Output
cdcbcdcfcdc
Note
In the second sample the name of the corporation consecutively changes as follows:
<image>
<image>
<image>
<image>
<image>
<image>
Tags: implementation, strings
Correct Solution:
```
import sys
size,swaps=map(int,sys.stdin.readline().split())
word=sys.stdin.readline()
alp='abcdefghijklmnopqrstuvwxyz'
alp2='abcdefghijklmnopqrstuvwxyz'
for i in range(swaps):
a,b=map(str,sys.stdin.readline().split())
alp2=alp2.replace(a,b.upper())
alp2=alp2.replace(b,a)
alp2=alp2.lower()
for i in range(26):
word=word.replace(alp[i],alp2[i].upper())
sys.stdout.write(word.lower().strip('\n'))
```
| 22,491
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
The name of one small but proud corporation consists of n lowercase English letters. The Corporation has decided to try rebranding — an active marketing strategy, that includes a set of measures to change either the brand (both for the company and the goods it produces) or its components: the name, the logo, the slogan. They decided to start with the name.
For this purpose the corporation has consecutively hired m designers. Once a company hires the i-th designer, he immediately contributes to the creation of a new corporation name as follows: he takes the newest version of the name and replaces all the letters xi by yi, and all the letters yi by xi. This results in the new version. It is possible that some of these letters do no occur in the string. It may also happen that xi coincides with yi. The version of the name received after the work of the last designer becomes the new name of the corporation.
Manager Arkady has recently got a job in this company, but is already soaked in the spirit of teamwork and is very worried about the success of the rebranding. Naturally, he can't wait to find out what is the new name the Corporation will receive.
Satisfy Arkady's curiosity and tell him the final version of the name.
Input
The first line of the input contains two integers n and m (1 ≤ n, m ≤ 200 000) — the length of the initial name and the number of designers hired, respectively.
The second line consists of n lowercase English letters and represents the original name of the corporation.
Next m lines contain the descriptions of the designers' actions: the i-th of them contains two space-separated lowercase English letters xi and yi.
Output
Print the new name of the corporation.
Examples
Input
6 1
police
p m
Output
molice
Input
11 6
abacabadaba
a b
b c
a d
e g
f a
b b
Output
cdcbcdcfcdc
Note
In the second sample the name of the corporation consecutively changes as follows:
<image>
<image>
<image>
<image>
<image>
<image>
Tags: implementation, strings
Correct Solution:
```
n,m=map(int,input().split())
x=list(input())
d={}
y=list(set(x))
z=list(set(x))
for i in x:
d[i]=i
for t in range(m):
a,b=map(str,input().split())
for i in range(len(y)):
if y[i]==a:
y[i]=b
elif y[i]==b:
y[i]=a
for i in range(len(y)):
d[z[i]]=y[i]
# print(d)
for i in range(n):
x[i]=d[x[i]]
print("".join(x))
```
| 22,492
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
The name of one small but proud corporation consists of n lowercase English letters. The Corporation has decided to try rebranding — an active marketing strategy, that includes a set of measures to change either the brand (both for the company and the goods it produces) or its components: the name, the logo, the slogan. They decided to start with the name.
For this purpose the corporation has consecutively hired m designers. Once a company hires the i-th designer, he immediately contributes to the creation of a new corporation name as follows: he takes the newest version of the name and replaces all the letters xi by yi, and all the letters yi by xi. This results in the new version. It is possible that some of these letters do no occur in the string. It may also happen that xi coincides with yi. The version of the name received after the work of the last designer becomes the new name of the corporation.
Manager Arkady has recently got a job in this company, but is already soaked in the spirit of teamwork and is very worried about the success of the rebranding. Naturally, he can't wait to find out what is the new name the Corporation will receive.
Satisfy Arkady's curiosity and tell him the final version of the name.
Input
The first line of the input contains two integers n and m (1 ≤ n, m ≤ 200 000) — the length of the initial name and the number of designers hired, respectively.
The second line consists of n lowercase English letters and represents the original name of the corporation.
Next m lines contain the descriptions of the designers' actions: the i-th of them contains two space-separated lowercase English letters xi and yi.
Output
Print the new name of the corporation.
Examples
Input
6 1
police
p m
Output
molice
Input
11 6
abacabadaba
a b
b c
a d
e g
f a
b b
Output
cdcbcdcfcdc
Note
In the second sample the name of the corporation consecutively changes as follows:
<image>
<image>
<image>
<image>
<image>
<image>
Tags: implementation, strings
Correct Solution:
```
import math
from decimal import Decimal
def na():
n = int(input())
b = [int(x) for x in input().split()]
return n,b
def nab():
n = int(input())
b = [int(x) for x in input().split()]
c = [int(x) for x in input().split()]
return n,b,c
def dv():
n, m = map(int, input().split())
return n,m
def dva():
n, m = map(int, input().split())
a = [int(x) for x in input().split()]
b = [int(x) for x in input().split()]
return n,m,b
def eratosthenes(n):
sieve = list(range(n + 1))
for i in sieve:
if i > 1:
for j in range(i + i, len(sieve), i):
sieve[j] = 0
return sorted(set(sieve))
def nm():
n = int(input())
b = [int(x) for x in input().split()]
m = int(input())
c = [int(x) for x in input().split()]
return n,b,m,c
def dvs():
n = int(input())
m = int(input())
return n, m
n, m = map(int, input().split())
s = input()
d = {}
for i in range(97, 123):
d[chr(i)] = chr(i)
for i in range(m):
x, y = input().split()
d[x], d[y] = d[y], d[x]
new = ''
t = {}
for i in d:
t[d[i]] = i
for i in s:
new += t[i]
print(new)
```
| 22,493
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
The name of one small but proud corporation consists of n lowercase English letters. The Corporation has decided to try rebranding — an active marketing strategy, that includes a set of measures to change either the brand (both for the company and the goods it produces) or its components: the name, the logo, the slogan. They decided to start with the name.
For this purpose the corporation has consecutively hired m designers. Once a company hires the i-th designer, he immediately contributes to the creation of a new corporation name as follows: he takes the newest version of the name and replaces all the letters xi by yi, and all the letters yi by xi. This results in the new version. It is possible that some of these letters do no occur in the string. It may also happen that xi coincides with yi. The version of the name received after the work of the last designer becomes the new name of the corporation.
Manager Arkady has recently got a job in this company, but is already soaked in the spirit of teamwork and is very worried about the success of the rebranding. Naturally, he can't wait to find out what is the new name the Corporation will receive.
Satisfy Arkady's curiosity and tell him the final version of the name.
Input
The first line of the input contains two integers n and m (1 ≤ n, m ≤ 200 000) — the length of the initial name and the number of designers hired, respectively.
The second line consists of n lowercase English letters and represents the original name of the corporation.
Next m lines contain the descriptions of the designers' actions: the i-th of them contains two space-separated lowercase English letters xi and yi.
Output
Print the new name of the corporation.
Examples
Input
6 1
police
p m
Output
molice
Input
11 6
abacabadaba
a b
b c
a d
e g
f a
b b
Output
cdcbcdcfcdc
Note
In the second sample the name of the corporation consecutively changes as follows:
<image>
<image>
<image>
<image>
<image>
<image>
Tags: implementation, strings
Correct Solution:
```
n,m=map(int,input().split())
st=input()
dic={}
xr="abcdefghijklmnopqrstuvwxyz"
for x in xr:
dic[x]=x
for x in range(m):
g,h=input().split()
dic[g],dic[h]=dic[h],dic[g]
#print(dic)
t={}
for k in dic:
t[dic[k]]=k
#print(t)
ls=[ t[x] for x in st]
print(''.join(ls))
```
| 22,494
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Berland scientists know that the Old Berland language had exactly n words. Those words had lengths of l1, l2, ..., ln letters. Every word consisted of two letters, 0 and 1. Ancient Berland people spoke quickly and didn’t make pauses between the words, but at the same time they could always understand each other perfectly. It was possible because no word was a prefix of another one. The prefix of a string is considered to be one of its substrings that starts from the initial symbol.
Help the scientists determine whether all the words of the Old Berland language can be reconstructed and if they can, output the words themselves.
Input
The first line contains one integer N (1 ≤ N ≤ 1000) — the number of words in Old Berland language. The second line contains N space-separated integers — the lengths of these words. All the lengths are natural numbers not exceeding 1000.
Output
If there’s no such set of words, in the single line output NO. Otherwise, in the first line output YES, and in the next N lines output the words themselves in the order their lengths were given in the input file. If the answer is not unique, output any.
Examples
Input
3
1 2 3
Output
YES
0
10
110
Input
3
1 1 1
Output
NO
Tags: data structures, greedy, trees
Correct Solution:
```
# https://codeforces.com/contest/37/problem/C
import sys
sys.setrecursionlimit(100000)
class Node:
def __init__(self):
self.child = dict()
self.isEnd = 0
def DFS(stack, level, mark, arr, m, pos):
if len(mark) == level:
arr.append((pos, mark))
stack.isEnd = 1
return
for i in ['0', '1']:
if len(arr) != m:
return
if not stack.child.get(i):
stack.child[i] = Node()
DFS(stack.child[i], level, mark + i, arr, m, pos)
elif not stack.child[i].isEnd:
DFS(stack.child[i], level, mark + i, arr, m, pos)
def addWord(root, level, arr):
temp = root
mark = len(arr)
pos = level[0]
level = level[1]
DFS(temp, level, '', arr, mark, pos)
if temp.isEnd or mark == len(arr):
return False
return True
n = int(input())
l = list(map(int, input().split()))
for i in range(n):
l[i] = (i, l[i])
l.sort(key=lambda x: x[1])
root = Node()
ans = []
for i in l:
if not addWord(root, i, ans):
print('NO')
exit()
ans.sort(key=lambda x: x[0])
print('YES')
for i in ans:
print(i[1])
```
| 23,198
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Berland scientists know that the Old Berland language had exactly n words. Those words had lengths of l1, l2, ..., ln letters. Every word consisted of two letters, 0 and 1. Ancient Berland people spoke quickly and didn’t make pauses between the words, but at the same time they could always understand each other perfectly. It was possible because no word was a prefix of another one. The prefix of a string is considered to be one of its substrings that starts from the initial symbol.
Help the scientists determine whether all the words of the Old Berland language can be reconstructed and if they can, output the words themselves.
Input
The first line contains one integer N (1 ≤ N ≤ 1000) — the number of words in Old Berland language. The second line contains N space-separated integers — the lengths of these words. All the lengths are natural numbers not exceeding 1000.
Output
If there’s no such set of words, in the single line output NO. Otherwise, in the first line output YES, and in the next N lines output the words themselves in the order their lengths were given in the input file. If the answer is not unique, output any.
Examples
Input
3
1 2 3
Output
YES
0
10
110
Input
3
1 1 1
Output
NO
Tags: data structures, greedy, trees
Correct Solution:
```
class Node():
def __init__(self):
self.child = dict()
self.count = 0
self.weight = 0
def addWord(root, s):
s = ""
tmp = root
length = 0
flag = False
for i in range(s):
if len(tmp.child) == 0:
tmp.child[0] = Node()
tmp = tmp.child[0]
elif len(tmp.child) == 1:
if tmp.child[0].count > 0:
tmp.child[1] = Node()
tmp = tmp.child[1]
tmp.count+=1
else:
tmp = tmp.child[0]
elif len(tmp.child) == 2:
if tmp.child[0].count > 0 and tmp.child[1].count > 0:
return True
elif tmp.child[0].count == 0:
tmp = tmp.child[0]
else:
tmp = tmp.child[1]
tmp.count+=1
return False
for ch in s:
length += 1
if ch in tmp.child:
tmp = tmp.child[ch]
if tmp.count > 0:
flag = True
if length == len(s):
flag = True
else:
tmp.child[ch] = Node()
tmp = tmp.child[ch]
tmp.weight+=1
tmp.count += 1
return flag
def find(root,s):
tmp = root
for ch in s:
if ch in tmp.child:
tmp = tmp.child[ch]
else:
return 0
return tmp.weight
def isWord(node):
return node.count != 0
def isEmpty(node):
return len(node.child) == 0
def removeWord(root, s, level, size):
if root == None:
return False
if level == size:
if root.count > 0:
root.count-=1
return True
return False
ch = s[level]
flag = removeWord(root.child[ch],s,level+1,size)
if flag == True and isWord(root.child[ch]) == False and isEmpty(root.child[ch]):
tmp = root.child[ch]
del tmp
del root.child[ch]
return flag
n = int(input())
cur = 0
word = ["" for _ in range(n)]
def dfs(string, depth):
global cur, n, ar, word
if cur >= n:
return
if ar[cur][0] == depth:
word[ar[cur][1]] = string
cur += 1
return
string += '0'
dfs(string, depth + 1)
string = string[:-1] + '1'
dfs(string, depth + 1)
string = string[:-1]
length = [int(i) for i in input().split()]
ar = [[length[i],i] for i in range(n)]
ar.sort()
dfs("",0)
if cur < n:
print("NO")
else:
print("YES")
for i in range(n):
print(word[i])
```
| 23,199
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Berland scientists know that the Old Berland language had exactly n words. Those words had lengths of l1, l2, ..., ln letters. Every word consisted of two letters, 0 and 1. Ancient Berland people spoke quickly and didn’t make pauses between the words, but at the same time they could always understand each other perfectly. It was possible because no word was a prefix of another one. The prefix of a string is considered to be one of its substrings that starts from the initial symbol.
Help the scientists determine whether all the words of the Old Berland language can be reconstructed and if they can, output the words themselves.
Input
The first line contains one integer N (1 ≤ N ≤ 1000) — the number of words in Old Berland language. The second line contains N space-separated integers — the lengths of these words. All the lengths are natural numbers not exceeding 1000.
Output
If there’s no such set of words, in the single line output NO. Otherwise, in the first line output YES, and in the next N lines output the words themselves in the order their lengths were given in the input file. If the answer is not unique, output any.
Examples
Input
3
1 2 3
Output
YES
0
10
110
Input
3
1 1 1
Output
NO
Tags: data structures, greedy, trees
Correct Solution:
```
import itertools
t = int
e = input
I = list
r = sorted
A = enumerate
X = bin
m = len
u = print
o = range
p = itertools.groupby
n = t(e())
L = [t(_)for _ in e().split()]
M = I(r(A(L), key=lambda x: x[1]))
N = [0 for x in L]
l = 0
b = 0
for k, U in p(M, key=lambda x: x[1]):
l <<= k-b
b = k
for g in U:
s = X(l)[2:]
N[g[0]] = '0'*(k-m(s))+s
l += 1
if l >= (1 << k)+1:
u("NO")
break
else:
u("YES")
for i in o(n):
u(N[i])
```
| 23,200
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Berland scientists know that the Old Berland language had exactly n words. Those words had lengths of l1, l2, ..., ln letters. Every word consisted of two letters, 0 and 1. Ancient Berland people spoke quickly and didn’t make pauses between the words, but at the same time they could always understand each other perfectly. It was possible because no word was a prefix of another one. The prefix of a string is considered to be one of its substrings that starts from the initial symbol.
Help the scientists determine whether all the words of the Old Berland language can be reconstructed and if they can, output the words themselves.
Input
The first line contains one integer N (1 ≤ N ≤ 1000) — the number of words in Old Berland language. The second line contains N space-separated integers — the lengths of these words. All the lengths are natural numbers not exceeding 1000.
Output
If there’s no such set of words, in the single line output NO. Otherwise, in the first line output YES, and in the next N lines output the words themselves in the order their lengths were given in the input file. If the answer is not unique, output any.
Examples
Input
3
1 2 3
Output
YES
0
10
110
Input
3
1 1 1
Output
NO
Tags: data structures, greedy, trees
Correct Solution:
```
n = int(input())
l = list(map(int, input().split()))
for i in range(n):
l[i] = (l[i], i)
l.sort(key=lambda x : x[0])
currentWord = ""
firstL = l[0][0]
for i in range(firstL):
currentWord += '0'
ans = ['' for _ in range(n)]
ans[l[0][1]] = currentWord
for i in range(1, n):
haveNext = False
while True:
lastChar = currentWord[-1]
currentWord = currentWord[:-1]
if lastChar == '0':
currentWord += '1'
haveNext = True
break
elif len(currentWord) == 0:
break
if not haveNext:
print("NO")
import sys
sys.exit()
while len(currentWord) < l[i][0]:
currentWord += '0'
ans[l[i][1]] = currentWord
print('YES')
for s in ans:
print(s)
```
| 23,201
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Berland scientists know that the Old Berland language had exactly n words. Those words had lengths of l1, l2, ..., ln letters. Every word consisted of two letters, 0 and 1. Ancient Berland people spoke quickly and didn’t make pauses between the words, but at the same time they could always understand each other perfectly. It was possible because no word was a prefix of another one. The prefix of a string is considered to be one of its substrings that starts from the initial symbol.
Help the scientists determine whether all the words of the Old Berland language can be reconstructed and if they can, output the words themselves.
Input
The first line contains one integer N (1 ≤ N ≤ 1000) — the number of words in Old Berland language. The second line contains N space-separated integers — the lengths of these words. All the lengths are natural numbers not exceeding 1000.
Output
If there’s no such set of words, in the single line output NO. Otherwise, in the first line output YES, and in the next N lines output the words themselves in the order their lengths were given in the input file. If the answer is not unique, output any.
Examples
Input
3
1 2 3
Output
YES
0
10
110
Input
3
1 1 1
Output
NO
Tags: data structures, greedy, trees
Correct Solution:
```
import sys
class input_tokenizer:
tokens = None
def __init__(self):
self.tokens = sys.stdin.read().split()[::-1]
def has_next(self):
return self.tokens != [] and self.tokens != None
def next(self):
token = self.tokens[-1]
self.tokens.pop()
return token
inp = input_tokenizer()
class Node:
def __init__(self, index, depth):
self.index = index
self.depth = depth
def __lt__(self, other):
return self.depth < other.depth
def dfs(s, depth, n, curr, word, arr):
stack = [[s, depth]]
while True:
if len(stack) == 0:
break
s, depth = stack.pop()
if curr >= n:
return curr, word
if arr[curr].depth == depth:
word[arr[curr].index] = s
curr += 1
continue
next_s = s + '0'
stack.append([next_s, depth + 1])
next_s = s + '1'
stack.append([next_s, depth + 1])
return curr, word
try:
n = int(inp.next())
arr = []
for i in range(n):
word_len = int(inp.next())
arr.append(Node(i, word_len))
arr.sort()
word = ['' for i in range(n)]
curr = 0
results = dfs('', 0, n, curr, word, arr)
word = results[1]
curr = results[0]
if curr < n:
print('NO')
else:
print('YES')
print(*word, sep='\n')
except Exception as ex:
print(ex)
```
| 23,202
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Berland scientists know that the Old Berland language had exactly n words. Those words had lengths of l1, l2, ..., ln letters. Every word consisted of two letters, 0 and 1. Ancient Berland people spoke quickly and didn’t make pauses between the words, but at the same time they could always understand each other perfectly. It was possible because no word was a prefix of another one. The prefix of a string is considered to be one of its substrings that starts from the initial symbol.
Help the scientists determine whether all the words of the Old Berland language can be reconstructed and if they can, output the words themselves.
Input
The first line contains one integer N (1 ≤ N ≤ 1000) — the number of words in Old Berland language. The second line contains N space-separated integers — the lengths of these words. All the lengths are natural numbers not exceeding 1000.
Output
If there’s no such set of words, in the single line output NO. Otherwise, in the first line output YES, and in the next N lines output the words themselves in the order their lengths were given in the input file. If the answer is not unique, output any.
Examples
Input
3
1 2 3
Output
YES
0
10
110
Input
3
1 1 1
Output
NO
Tags: data structures, greedy, trees
Correct Solution:
```
import sys
sys.setrecursionlimit(1000000)
class Node():
def __init__(self, val):
self.child = dict()
self.blocked = False
self.val = val
class Trie():
def __init__(self):
self.root = Node("")
def addLength(self, length, id, res):
cur = self.root
stk = [cur]
while length > 0 and len(stk) > 0:
length -= 1
if 0 not in cur.child :
cur.child[0] = Node("0")
if not cur.child[0].blocked:
cur = cur.child[0]
else:
if 1 not in cur.child:
cur.child[1] = Node("1")
if not cur.child[1].blocked:
cur = cur.child[1]
else:
cur.blocked = True
stk.pop()
if len(stk) > 0: cur = stk[-1]
length += 2
continue
stk.append(cur)
if len(stk) == 0:
return False
cur.blocked = True
res[id] = ''.join(x.val for x in stk)
#print(res[id])
return True
n = int(input())
a = list(map(int, input().split()))
a = sorted([(a[i], i) for i in range(n)])
trie = Trie()
res = [""] * n
#print(*a)
for length, i in a:
if not trie.addLength(length, i, res):
print("NO")
exit(0)
print("YES")
print(*res, sep = "\n")
```
| 23,203
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Berland scientists know that the Old Berland language had exactly n words. Those words had lengths of l1, l2, ..., ln letters. Every word consisted of two letters, 0 and 1. Ancient Berland people spoke quickly and didn’t make pauses between the words, but at the same time they could always understand each other perfectly. It was possible because no word was a prefix of another one. The prefix of a string is considered to be one of its substrings that starts from the initial symbol.
Help the scientists determine whether all the words of the Old Berland language can be reconstructed and if they can, output the words themselves.
Input
The first line contains one integer N (1 ≤ N ≤ 1000) — the number of words in Old Berland language. The second line contains N space-separated integers — the lengths of these words. All the lengths are natural numbers not exceeding 1000.
Output
If there’s no such set of words, in the single line output NO. Otherwise, in the first line output YES, and in the next N lines output the words themselves in the order their lengths were given in the input file. If the answer is not unique, output any.
Examples
Input
3
1 2 3
Output
YES
0
10
110
Input
3
1 1 1
Output
NO
Tags: data structures, greedy, trees
Correct Solution:
```
n, ls = int(input()), list(map(int, input().split()))
l = [(ls[i], i) for i in range(n)]
l.sort(key = lambda x: x[0])
c, a = 0, ['0'*l[0][0]]
for i in range(1, n):
if c == 2**l[i-1][0]-1:
break
c = (c+1) * 2**(l[i][0] - l[i-1][0])
a.append(format(c, "0" + str(l[i][0]) + "b"))
if len(a) == n:
print("YES")
ans = [0] * n
for i in range(n):
ans[l[i][1]] = a[i]
for i in range(n):
print(ans[i])
else:
print("NO")
# Made By Mostafa_Khaled
```
| 23,204
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Berland scientists know that the Old Berland language had exactly n words. Those words had lengths of l1, l2, ..., ln letters. Every word consisted of two letters, 0 and 1. Ancient Berland people spoke quickly and didn’t make pauses between the words, but at the same time they could always understand each other perfectly. It was possible because no word was a prefix of another one. The prefix of a string is considered to be one of its substrings that starts from the initial symbol.
Help the scientists determine whether all the words of the Old Berland language can be reconstructed and if they can, output the words themselves.
Input
The first line contains one integer N (1 ≤ N ≤ 1000) — the number of words in Old Berland language. The second line contains N space-separated integers — the lengths of these words. All the lengths are natural numbers not exceeding 1000.
Output
If there’s no such set of words, in the single line output NO. Otherwise, in the first line output YES, and in the next N lines output the words themselves in the order their lengths were given in the input file. If the answer is not unique, output any.
Examples
Input
3
1 2 3
Output
YES
0
10
110
Input
3
1 1 1
Output
NO
Tags: data structures, greedy, trees
Correct Solution:
```
"""
https://codeforces.com/contest/37/problem/C
"""
curr, n = 0, 0
a = []
word = []
def dfs(string, depth):
global curr, n, a, word
if curr >= n:
return
if a[curr][0] == depth:
word[a[curr][1]] = string
curr += 1
return
string += '0'
dfs(string, depth + 1)
string = string[:-1] + '1'
dfs(string, depth + 1)
string = string[:-1]
def main():
global curr, n, a, word
n = int(input())
length = list(map(int, input().split()))
a = [[length[i], i] for i in range(n)]
word = ["" for _ in range(n)]
a.sort()
curr = 0
dfs("", 0)
if curr < n:
print("NO")
else:
print("YES")
for i in range(n):
print(word[i])
return 0
if __name__ == "__main__":
main()
```
| 23,205
|
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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.
Berland scientists know that the Old Berland language had exactly n words. Those words had lengths of l1, l2, ..., ln letters. Every word consisted of two letters, 0 and 1. Ancient Berland people spoke quickly and didn’t make pauses between the words, but at the same time they could always understand each other perfectly. It was possible because no word was a prefix of another one. The prefix of a string is considered to be one of its substrings that starts from the initial symbol.
Help the scientists determine whether all the words of the Old Berland language can be reconstructed and if they can, output the words themselves.
Input
The first line contains one integer N (1 ≤ N ≤ 1000) — the number of words in Old Berland language. The second line contains N space-separated integers — the lengths of these words. All the lengths are natural numbers not exceeding 1000.
Output
If there’s no such set of words, in the single line output NO. Otherwise, in the first line output YES, and in the next N lines output the words themselves in the order their lengths were given in the input file. If the answer is not unique, output any.
Examples
Input
3
1 2 3
Output
YES
0
10
110
Input
3
1 1 1
Output
NO
Submitted Solution:
```
import sys
import operator
import queue
sys.setrecursionlimit(100000)
# global constant
INF = int(1e7+1)
MAX = 2
# For testing
#sys.stdin = open("INP.txt", 'r')
#sys.stdout = open("OUT.txt", 'w')
# global variables
ans = 1000*[None]
# classes
class Pair:
def __init__(self, first, second):
self.first = first
self.second = second
class node:
def __init__(self):
self.countLeaf = 0
self.child = MAX*[None]
self.isValid = True
# functions
def addWord(root, length, string):
if length == 0:
return True, string
if not root.child[0] or root.child[0].isValid:
string+='0'
if not root.child[0]:
root.child[0] = node()
if length==1:
root.child[0].isValid = False
ret, string = addWord(root.child[0], length-1, string)
if root.child[0] and root.child[1] and not root.child[0].isValid and not root.child[1].isValid:
root.isValid = False
return ret, string
elif not root.child[1] or root.child[1].isValid:
string+='1'
if not root.child[1]:
root.child[1] = node()
if length==1:
root.child[1].isValid = False
ret, string = addWord(root.child[1], length-1, string)
if root.child[0] and root.child[1] and not root.child[0].isValid and not root.child[1].isValid:
root.isValid = False
return ret, string
return False, string
# main function
def main():
n = int(input())
a = list(map(int, input().split()))
for i in range(n):
a[i] = Pair(a[i], i)
a.sort(key = lambda x: x.first)
root = node()
for word in a:
flag, string = addWord(root, word.first, '')
if not flag:
print("NO")
raise SystemExit
ans[word.second] = string
print("YES")
for i in range(n):
print(ans[i])
main()
```
Yes
| 23,206
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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.
Berland scientists know that the Old Berland language had exactly n words. Those words had lengths of l1, l2, ..., ln letters. Every word consisted of two letters, 0 and 1. Ancient Berland people spoke quickly and didn’t make pauses between the words, but at the same time they could always understand each other perfectly. It was possible because no word was a prefix of another one. The prefix of a string is considered to be one of its substrings that starts from the initial symbol.
Help the scientists determine whether all the words of the Old Berland language can be reconstructed and if they can, output the words themselves.
Input
The first line contains one integer N (1 ≤ N ≤ 1000) — the number of words in Old Berland language. The second line contains N space-separated integers — the lengths of these words. All the lengths are natural numbers not exceeding 1000.
Output
If there’s no such set of words, in the single line output NO. Otherwise, in the first line output YES, and in the next N lines output the words themselves in the order their lengths were given in the input file. If the answer is not unique, output any.
Examples
Input
3
1 2 3
Output
YES
0
10
110
Input
3
1 1 1
Output
NO
Submitted Solution:
```
from sys import setrecursionlimit
setrecursionlimit(1000000)
bit = ['0', '1']
class Node:
def __init__(self):
self.endWord = False
self.child = {}
def addWord(root, lengthLeft):
if root.endWord:
return False
if lengthLeft == 0:
root.endWord = True
return True
for char in bit:
if char not in root.child:
root.child[char] = Node()
if addWord(root.child[char], lengthLeft - 1):
return True
return False
def saveWord(root, st):
if root.endWord:
global words
words.append(st)
for char in root.child:
saveWord(root.child[char], st + char)
N = int(input())
root = Node()
lengths = list(map(int, input().split()))
sortedLens = []
for i in range(1, N + 1):
sortedLens.append((lengths[i - 1], i))
sortedLens.sort()
for length, ID in sortedLens:
if not addWord(root, length):
print("NO")
exit()
words = []
saveWord(root, "")
ans = []
for i in range(N):
length, ID = sortedLens[i]
word = words[i]
ans.append((ID, word))
ans.sort()
print("YES")
for ID, word in ans:
print(word)
```
Yes
| 23,207
|
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|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Berland scientists know that the Old Berland language had exactly n words. Those words had lengths of l1, l2, ..., ln letters. Every word consisted of two letters, 0 and 1. Ancient Berland people spoke quickly and didn’t make pauses between the words, but at the same time they could always understand each other perfectly. It was possible because no word was a prefix of another one. The prefix of a string is considered to be one of its substrings that starts from the initial symbol.
Help the scientists determine whether all the words of the Old Berland language can be reconstructed and if they can, output the words themselves.
Input
The first line contains one integer N (1 ≤ N ≤ 1000) — the number of words in Old Berland language. The second line contains N space-separated integers — the lengths of these words. All the lengths are natural numbers not exceeding 1000.
Output
If there’s no such set of words, in the single line output NO. Otherwise, in the first line output YES, and in the next N lines output the words themselves in the order their lengths were given in the input file. If the answer is not unique, output any.
Examples
Input
3
1 2 3
Output
YES
0
10
110
Input
3
1 1 1
Output
NO
Submitted Solution:
```
def get_next(b):
if not b:
b.append(0)
return
add = 1
remember = 0
for i in range(len(b) - 1 , -1 , -1):
temp = b[i] + add + remember
if temp > 1:
temp = 0
remember = 1
else:
remember = 0
add = 0
b[i] = temp
def is_largest(b):
if not b:
return False
for i in range(len(b)):
if b[i] == 0:
return False
return True
def solve():
N = int(input())
items =[]
index = 0
for length in map(int,input().split()):
items.append((index,length))
index += 1
items = sorted(items,key=lambda item: item[1])
result = []
results = [0 for _ in range(N)]
for item in items:
index,length = item
if is_largest(result):
print('NO')
break
if result:
get_next(result)
else:
result = [0 for _ in range(length)]
while len(result) < length:
result.append(0)
results[index] = ''.join(str(num) for num in result)
else:
print('YES')
for result in results:
print(result)
solve()
```
Yes
| 23,208
|
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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.
Berland scientists know that the Old Berland language had exactly n words. Those words had lengths of l1, l2, ..., ln letters. Every word consisted of two letters, 0 and 1. Ancient Berland people spoke quickly and didn’t make pauses between the words, but at the same time they could always understand each other perfectly. It was possible because no word was a prefix of another one. The prefix of a string is considered to be one of its substrings that starts from the initial symbol.
Help the scientists determine whether all the words of the Old Berland language can be reconstructed and if they can, output the words themselves.
Input
The first line contains one integer N (1 ≤ N ≤ 1000) — the number of words in Old Berland language. The second line contains N space-separated integers — the lengths of these words. All the lengths are natural numbers not exceeding 1000.
Output
If there’s no such set of words, in the single line output NO. Otherwise, in the first line output YES, and in the next N lines output the words themselves in the order their lengths were given in the input file. If the answer is not unique, output any.
Examples
Input
3
1 2 3
Output
YES
0
10
110
Input
3
1 1 1
Output
NO
Submitted Solution:
```
import sys
sys.setrecursionlimit(1050)
class Node:
def __init__(self, depth, parent):
self.depth = depth
self.parent = parent
self.left = None
self.right = None
self.leaf = False
def __str__(self):
return 'depth = %d, left? %s, right? %s' % (self.depth,
self.left != None, self.right != None)
stacks = {}
def traverse(node, symbols):
if node.leaf:
s = ''.join(symbols)
stacks.setdefault(len(s), []).append(s)
return
if node.left != None:
symbols.append('0')
traverse(node.left, symbols)
symbols.pop()
if node.right != None:
symbols.append('1')
traverse(node.right, symbols)
symbols.pop()
n = int(input())
original_lengths = list(map(int, input().split()))
lengths = sorted(original_lengths[:])
root = Node(0, None)
curr = root
for i in range(lengths[0]):
curr.left = Node(curr.depth+1, curr)
curr = curr.left
curr.leaf = True
for length in lengths[1:]:
curr = curr.parent
while curr.right != None:
if curr == root:
print('NO')
sys.exit()
curr = curr.parent
curr.right = Node(curr.depth+1, curr)
curr = curr.right
while curr.depth != length:
curr.left = Node(curr.depth+1, curr)
curr = curr.left
curr.leaf = True
print('YES')
traverse(root, [])
for length in original_lengths:
print(stacks[length].pop())
```
Yes
| 23,209
|
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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.
Berland scientists know that the Old Berland language had exactly n words. Those words had lengths of l1, l2, ..., ln letters. Every word consisted of two letters, 0 and 1. Ancient Berland people spoke quickly and didn’t make pauses between the words, but at the same time they could always understand each other perfectly. It was possible because no word was a prefix of another one. The prefix of a string is considered to be one of its substrings that starts from the initial symbol.
Help the scientists determine whether all the words of the Old Berland language can be reconstructed and if they can, output the words themselves.
Input
The first line contains one integer N (1 ≤ N ≤ 1000) — the number of words in Old Berland language. The second line contains N space-separated integers — the lengths of these words. All the lengths are natural numbers not exceeding 1000.
Output
If there’s no such set of words, in the single line output NO. Otherwise, in the first line output YES, and in the next N lines output the words themselves in the order their lengths were given in the input file. If the answer is not unique, output any.
Examples
Input
3
1 2 3
Output
YES
0
10
110
Input
3
1 1 1
Output
NO
Submitted Solution:
```
from sys import stdin
n = int(stdin.readline())
a = [int(x) for x in stdin.readline().split()]
a.sort()
high = a[-1]
total = 1<<high
a = [high-x for x in a]
current = 0
words = []
for x in a:
words.append(current>>x)
current += 1<<x
if current > total:
print('NO')
else:
print('YES')
print('\n'.join(["{0:b}".format(x) for x in words]))
```
No
| 23,210
|
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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.
Berland scientists know that the Old Berland language had exactly n words. Those words had lengths of l1, l2, ..., ln letters. Every word consisted of two letters, 0 and 1. Ancient Berland people spoke quickly and didn’t make pauses between the words, but at the same time they could always understand each other perfectly. It was possible because no word was a prefix of another one. The prefix of a string is considered to be one of its substrings that starts from the initial symbol.
Help the scientists determine whether all the words of the Old Berland language can be reconstructed and if they can, output the words themselves.
Input
The first line contains one integer N (1 ≤ N ≤ 1000) — the number of words in Old Berland language. The second line contains N space-separated integers — the lengths of these words. All the lengths are natural numbers not exceeding 1000.
Output
If there’s no such set of words, in the single line output NO. Otherwise, in the first line output YES, and in the next N lines output the words themselves in the order their lengths were given in the input file. If the answer is not unique, output any.
Examples
Input
3
1 2 3
Output
YES
0
10
110
Input
3
1 1 1
Output
NO
Submitted Solution:
```
# l1, l2, ln
# 1 2 3
# 0 10 110
# 1 01 001
# 0 1 ?
# N
# 1 2 3
# root
# 0 1
# 0 in children and this node is end of word => 1 ? , 1 is also end of word: yes: return NO
# else: add children in
# 1: add 0
# prefix is when end of word
# 0 1 1 0
# 0 1 1 1
class Node:
def __init__(self):
self.endWord = False
self.children = {}
# add(1) # 0
# add(2) # 10
# add(3) # 110
# add(2) # 00
# add(2) # 01
# add(2) # 0
def addNode(root, num): # num = 1, 2 ,3
s = ''
cur = root
for i in range(num):
c = '0'
if c not in cur.children:
cur.children[c] = Node()
elif cur.children[c].endWord == True:
c = '1'
if c not in cur.children:
cur.children[c] = Node()
elif cur.children[c].endWord == True:
return ''
cur = cur.children[c]
# print(cur)
s += c
# print(s)
cur.endWord = True
return s
def main():
n = int(input())
nums = map(int, input().split())
res = []
root = Node()
# print(res)
for num in nums:
s = addNode(root, num)
# print(s)
if s == '':
return []
res.append(s)
return res
ans = main()
if len(ans) == 0:
print('NO')
else:
print('YES')
print('\n'.join(ans))
```
No
| 23,211
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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.
Berland scientists know that the Old Berland language had exactly n words. Those words had lengths of l1, l2, ..., ln letters. Every word consisted of two letters, 0 and 1. Ancient Berland people spoke quickly and didn’t make pauses between the words, but at the same time they could always understand each other perfectly. It was possible because no word was a prefix of another one. The prefix of a string is considered to be one of its substrings that starts from the initial symbol.
Help the scientists determine whether all the words of the Old Berland language can be reconstructed and if they can, output the words themselves.
Input
The first line contains one integer N (1 ≤ N ≤ 1000) — the number of words in Old Berland language. The second line contains N space-separated integers — the lengths of these words. All the lengths are natural numbers not exceeding 1000.
Output
If there’s no such set of words, in the single line output NO. Otherwise, in the first line output YES, and in the next N lines output the words themselves in the order their lengths were given in the input file. If the answer is not unique, output any.
Examples
Input
3
1 2 3
Output
YES
0
10
110
Input
3
1 1 1
Output
NO
Submitted Solution:
```
# Problem from Codeforces
# http://codeforces.com/contest/37/problem/C
import sys
class input_tokenizer:
__tokens = None
def has_next(self):
return self.__tokens != [] and self.__tokens != None
def next(self):
token = self.__tokens[-1]
self.__tokens.pop()
return token
def __init__(self):
self.__tokens = sys.stdin.read().split()[::-1]
inp = input_tokenizer()
class Node:
def __init__(self, index, depth):
self.index = index
self.depth = depth
def __lt__(self, other):
return self.depth < other.depth
def dfs(s, depth, n, curr, word, arr):
if curr >= n:
return curr, word
if arr[curr].depth == depth:
word[arr[curr].index] = s
curr += 1
return curr, word
s += '0'
curr, word = dfs(s, depth + 1, n, curr, word, arr)
s = s[:len(s) - 1] + '1'
curr, word = dfs(s, depth + 1, n, curr, word, arr)
return curr, word
def solution():
try:
n = int(inp.next())
arr = []
for i in range(n):
word_len = int(inp.next())
arr.append(Node(i, word_len))
arr.sort()
word = ['' for i in range(n)]
curr = 0
results = dfs('', 0, n, curr, word, arr)
word = results[1]
curr = results[0]
if curr < n:
print('NO')
else:
print('YES')
print(*word, sep='\n')
except Exception:
import traceback
print(traceback.format_exc())
solution()
```
No
| 23,212
|
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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.
Berland scientists know that the Old Berland language had exactly n words. Those words had lengths of l1, l2, ..., ln letters. Every word consisted of two letters, 0 and 1. Ancient Berland people spoke quickly and didn’t make pauses between the words, but at the same time they could always understand each other perfectly. It was possible because no word was a prefix of another one. The prefix of a string is considered to be one of its substrings that starts from the initial symbol.
Help the scientists determine whether all the words of the Old Berland language can be reconstructed and if they can, output the words themselves.
Input
The first line contains one integer N (1 ≤ N ≤ 1000) — the number of words in Old Berland language. The second line contains N space-separated integers — the lengths of these words. All the lengths are natural numbers not exceeding 1000.
Output
If there’s no such set of words, in the single line output NO. Otherwise, in the first line output YES, and in the next N lines output the words themselves in the order their lengths were given in the input file. If the answer is not unique, output any.
Examples
Input
3
1 2 3
Output
YES
0
10
110
Input
3
1 1 1
Output
NO
Submitted Solution:
```
import sys
class Node:
def __init__(self, depth, parent):
self.depth = depth
self.parent = parent
self.left = None
self.right = None
self.leaf = False
def __str__(self):
return 'depth = %d, left? %s, right? %s' % (self.depth,
self.left != None, self.right != None)
def traverse(node, symbols):
if node.leaf:
print(''.join(symbols))
return
if node.left != None:
symbols.append('0')
traverse(node.left, symbols)
symbols.pop()
if node.right != None:
symbols.append('1')
traverse(node.right, symbols)
symbols.pop()
n = int(input())
lengths = sorted(list(map(int, input().split())))
root = Node(0, None)
curr = root
for i in range(lengths[0]):
curr.left = Node(curr.depth+1, curr)
curr = curr.left
curr.leaf = True
for length in lengths[1:]:
curr = curr.parent
while curr.right != None:
if curr == root:
print('NO')
sys.exit()
curr = curr.parent
curr.right = Node(curr.depth+1, curr)
curr = curr.right
while curr.depth != length:
curr.left = Node(curr.depth+1, curr)
curr = curr.left
curr.leaf = True
print('YES')
traverse(root, [])
```
No
| 23,213
|
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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
import sys
from functools import lru_cache, cmp_to_key
from heapq import merge, heapify, heappop, heappush
from math import *
from collections import defaultdict as dd, deque, Counter as C
from itertools import combinations as comb, permutations as perm
from bisect import bisect_left as bl, bisect_right as br, bisect
from time import perf_counter
from fractions import Fraction
import copy
import time
starttime = time.time()
mod = int(pow(10, 9) + 7)
mod2 = 998244353
def data(): return sys.stdin.readline().strip()
def out(*var, end="\n"): sys.stdout.write(' '.join(map(str, var))+end)
def L(): return list(sp())
def sl(): return list(ssp())
def sp(): return map(int, data().split())
def ssp(): return map(str, data().split())
def l1d(n, val=0): return [val for i in range(n)]
def l2d(n, m, val=0): return [l1d(n, val) for j in range(m)]
try:
# sys.setrecursionlimit(int(pow(10,7)))
sys.stdin = open("input.txt", "r")
# sys.stdout = open("../output.txt", "w")
except:
pass
def pmat(A):
for ele in A:
print(*ele,end="\n")
def seive():
prime=[1 for i in range(10**6+1)]
prime[0]=0
prime[1]=0
for i in range(10**6+1):
if(prime[i]):
for j in range(2*i,10**6+1,i):
prime[j]=0
return prime
# exit()
# from sys import stdin
# input = stdin.readline
n,m=L()
A=[input() for i in range(n)]
t=["" for i in range(n)]
ans=0
for i in range(m):
f=[t[j]+A[j][i] for j in range(n)]
if f==sorted(f):
t=f
else:
ans+=1
print(ans)
endtime = time.time()
# print(f"Runtime of the program is {endtime - starttime}")
```
| 23,278
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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)
```
| 23,279
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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:
```
n, m = list(map(int, input().rstrip().split()))
words = []
op = 0
for i in range(n):
words += [input()]
final = [""]*n
for j in range(m):
flag = 1
for i in range(n - 1):
x = final[i] + words[i][j]
y = final[i + 1] + words[i + 1][j]
if x > y:
op += 1
flag = 0
break
if flag == 1:
for i in range(n):
final[i] += words[i][j]
print(op)
```
| 23,280
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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 sys import maxsize, stdout, stdin,stderr
mod = int(1e9+7)
import sys
def I(): return int(stdin.readline())
def lint(): return [int(x) for x in stdin.readline().split()]
def S(): return list(map(str,input().strip()))
def grid(r, c): return [lint() for i in range(r)]
from collections import defaultdict, Counter, deque
import math
import heapq
from heapq import heappop , heappush
import bisect
from itertools import groupby
from itertools import permutations as comb
def gcd(a,b):
while b:
a %= b
tmp = a
a = b
b = tmp
return a
def lcm(a,b):
return a // gcd(a, b) * b
def check_prime(n):
for i in range(2, int(n ** (1 / 2)) + 1):
if not n % i:
return False
return True
def nCr(n, r):
return (fact(n) // (fact(r)
* fact(n - r)))
# Returns factorial of n
def fact(n):
res = 1
for i in range(2, n+1):
res = res * i
return res
def primefactors(n):
num=0
while n % 2 == 0:
num+=1
n = n / 2
for i in range(3,int(math.sqrt(n))+1,2):
while n % i== 0:
num+=1
n = n // i
if n > 2:
num+=1
return num
'''
def iter_ds(src):
store=[src]
while len(store):
tmp=store.pop()
if not vis[tmp]:
vis[tmp]=True
for j in ar[tmp]:
store.append(j)
'''
def ask(a):
print('? {}'.format(a),flush=True)
n=I()
return n
def dfs(i,p):
a,tmp=0,0
for j in d[i]:
if j!=p:
a+=1
tmp+=dfs(j,i)
if a==0:
return 0
return tmp/a + 1
def primeFactors(n):
l=[]
while n % 2 == 0:
l.append(2)
n = n // 2
if n > 2:
l.append(n)
return l
r,c=lint()
s=[]
s.append(['a']*(c+1))
for _ in range(r):
s.append(['a']+S())
cnt=0
k=0
t=[0]*(r+1)
for i in range(1,c+1):
flag=0
for j in range(1,r):
if not t[j]:
if ord(s[j+1][i])<ord(s[j][i]):
cnt+=1
flag=1
break
if not flag:
for j in range(1,r):
if s[j][i]<s[j+1][i]:
t[j]=1
print(cnt)
```
| 23,281
|
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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))
```
| 23,282
|
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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:
```
n, m = list(map(int, input().split()))
ls = [input() for _ in range(n)]
sorted_inds = [0] * n
ans = 0
for i in range(m):
new_sorted_inds = set()
for j in range(1, n):
if sorted_inds[j] == 0:
if ls[j][i] < ls[j - 1][i]:
ans += 1
break
else:
for j in range(1, n):
if ls[j][i] > ls[j - 1][i]:
sorted_inds[j] = 1
print(ans)
```
| 23,283
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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:
```
import sys
import math
MAXNUM = math.inf
MINNUM = -1 * math.inf
ASCIILOWER = 97
ASCIIUPPER = 65
def getInt():
return int(sys.stdin.readline().rstrip())
def getInts():
return map(int, sys.stdin.readline().rstrip().split(" "))
def getString():
return sys.stdin.readline().rstrip()
def printOutput(ans):
sys.stdout.write()
pass
def orderedVal(grid, curValues, column):
if column == 0:
return 0
for i in range(len(grid)):
if grid[i][curValues] > grid[i][column]:
return math.inf
return 0
def isLex(grid, column):
for i in range(1, len(grid)):
if grid[i][column] < grid[i - 1][column]:
return False
return True
def getLexPairs(grid, column):
lPairs = set()
for i in range(1, len(grid)):
if grid[i][column] == grid[i - 1][column]:
lPairs.add((i - 1, i))
return lPairs
def compare(grid, column, lPairs):
nextlPairs = set()
"""either returns remaining lPairs, True, or False"""
for a, b in lPairs:
# print("hi", a, b)
# print(grid[a][column], grid[b][column])
if grid[a][column] > grid[b][column]:
return False
elif grid[a][column] == grid[b][column]:
nextlPairs.add((a, b))
return nextlPairs
def solve(grid):
ans = len(grid[0])
for column in range(len(grid[0])):
if ans <= column:
break
if isLex(grid, column):
removeCol = 0
lPairs = getLexPairs(grid, column)
# print(column, lPairs)
for nextColumn in range(column + 1, len(grid[0])):
k = compare(grid, nextColumn, lPairs)
# print('comp',k)
if k == False:
removeCol += 1
elif len(k) == 0:
break
else:
lPairs = k
ans = min(ans, column + removeCol)
return ans
def readinput():
n, m = getInts()
grid = []
for _ in range(n):
grid.append(getString())
print(solve(grid))
readinput()
```
| 23,284
|
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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:
```
line = input().split()
n = int(line[0])
m = int(line[1])
data = []
for i in range(n):
data.append(input())
x = [1 for i in range(n)]
delete = 0
for i in range(m):
dum = [1 for j in range(n)]
status = 1
for j in range(1,n):
if data[j][i] > data[j-1][i]:
dum[j] = 0
elif data[j][i] == data[j-1][i]:
dum[j] = 1
else:
if x[j] == 1:
delete += 1
status = 0
break
if status == 1:
for j in range(len(dum)):
if dum[j] == 0:
x[j] = 0
print(delete)
```
| 23,285
|
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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 = [int(x) for x in input().split()]
rs = [input() for _ in range(n)]
mask = [1] * m
def get_masked(x):
return ''.join(y for y, m in zip(x, mask) if m)
res = 0
for i in range(m):
l = [get_masked(x)[:i - res + 1] for x in rs]
if not all(l[i] <= l[i+1] for i in range(len(l)-1)):
mask[i] = 0
res += 1
print(res)
```
Yes
| 23,286
|
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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())
grid = []
for _ in range(n):
grid.append(list(input()))
deleted = 0
last = []
for j in range(m):
for i in range(1,n):
if grid[i][j] < grid[i-1][j] and len(last) == 0:
deleted += 1
break
elif len(last) and grid[i][j] < grid[i-1][j]:
if ''.join(grid[i-1][x] for x in last+[j]) > ''.join(grid[i][x] for x in last+[j]):
deleted += 1
break
else:
last.append(j)
print(deleted)
```
Yes
| 23,287
|
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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:
```
import sys
from collections import deque
import math
input_ = lambda: sys.stdin.readline().strip("\r\n")
ii = lambda : int(input_())
il = lambda : list(map(int, input_().split()))
ilf = lambda : list(map(float, input_().split()))
ip = lambda : input_()
fi = lambda : float(input_())
li = lambda : list(input_())
pr = lambda x : print(x)
f = lambda : sys.stdout.flush()
n,m = il()
ans = 0
a = []
for _ in range(n) :
a.append(ip())
b = ['' for _ in range (n)]
for i in range (m) :
c = []
for j in range(n) :
c.append(b[j]+a[j][i])
if (c == sorted(c)) :
if len(c) == len(set(c)) :
break
else :
b = c
else :
ans += 1
print(ans)
```
Yes
| 23,288
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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
| 23,289
|
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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:
```
#!/usr/bin/env python3
n, m = map(int, input().split())
table = [[c for c in input()] for i in range(n)]
def is_good_column(c, adj):
flag = False
for i in range(n - 1):
if (not adj or (adj and table[i][adj] == table[i+1][adj])) and table[i][c] > table[i+1][c]:
return False, False
elif table[i][c] == table[i+1][c]:
flag = True
return True, flag
i = 0
need = m
count = 0
adj = None
while i < need:
flag, dup = is_good_column(i, adj)
if flag:
adj = i
if not dup:
break
else:
count += 1
need = min(i + 2, m)
i += 1
print(count)
```
No
| 23,290
|
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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 itertools import combinations
# from bisect import bisect_left
# from functools import *
# from collections import Counter
def is_lexigraphic(s):
for i in range(len(s) - 1):
if s[i] > s[i + 1]:
return False
return True
I = lambda: list(map(int, input().split()))
n, m = I()
a = [input() for i in range(n)]
mn = m
columns = list(zip(*a))
for i in range(m):
curCol = columns[i]
if not is_lexigraphic(curCol):
continue
l = []
for j in range(n - 1):
if curCol[j] == curCol[j + 1]:
l.append((j, j + 1))
x = 0
for k in range(i + 1, m):
if any([columns[k][a] > columns[k][b] for a, b in l]):
x += 1
else:
break
mn = min(x + i, mn)
print(mn)
```
No
| 23,291
|
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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 itertools import combinations, permutations
def is_good(s,n,m):
for i in range(n-1):
if s[i] > s[i+1]: return False
return True
def main2(n,m,a):
if n <= 0 or m<=0 or is_good(a,n,m):
print(0)
return
for i in range(1,m):
p = combinations(range(m),i)
for j in p:
s = ["".join([k for b,k in enumerate(x) if b not in j]) for x in a]
if is_good(s,n,m-i):
print(i)
return
print(m)
def main3(n,m,a):
if n <= 1 or m<=0 or is_good(a,n,m):
print(0)
return
bad = []
for i in range(0,m):
if not is_good(["".join([k for b,k in enumerate(x) if b!=i])
for x in a],n,m):
bad.append(i)
for i in range(1,len(bad)+1):
p = combinations(bad,i)
for j in p:
s = ["".join([k for b,k in enumerate(x) if b not in j]) for x in a]
if is_good(s,n,m-i):
print(i)
return
print(m)
def main4(n,m,a):
if n <= 1 or m<=0 or is_good(a,n,m):
print(0)
return
bad = []
for i in range(0,m):
if not is_good(["".join([k for b,k in enumerate(x) if b!=i])
for x in a],n,m):
bad.append(i)
p = []
for i in bad:
p.append(i)
s = ["".join([k for b,k in enumerate(x) if b not in p]) for x in a]
if is_good(s,n,m-i):
print(i)
return
print(m)
def line_is_good(a,j):
for i in range(len(a)-1):
if a[i][j] > a[i+1][j]: return False
return True
def main(n,m,a):
if n <= 1 or m<=0 or is_good(a,n,m):
print(0)
return
bad = []
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,n,m-len(bad)):
print(len(bad))
return
print(m)
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()
```
No
| 23,292
|
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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 itertools import combinations, permutations
def is_good(s,n,m):
for i in range(n-1):
if s[i] > s[i+1]: return False
return True
def main2(n,m,a):
if n <= 0 or m<=0 or is_good(a,n,m):
print(0)
return
for i in range(1,m):
p = combinations(range(m),i)
for j in p:
s = ["".join([k for b,k in enumerate(x) if b not in j]) for x in a]
if is_good(s,n,m-i):
print(i)
return
print(m)
def main(n,m,a):
if n <= 0 or m<=0 or is_good(a,n,m):
print(0)
return
bad = []
for i in range(0,m):
if not is_good(["".join([k for b,k in enumerate(x) if b!=i])
for x in a],n,m):
bad.append(i)
for i in range(1,m):
p = combinations(bad,i)
for j in p:
s = ["".join([k for b,k in enumerate(x) if b not in j]) for x in a]
if is_good(s,n,m-i):
print(i)
return
print(m)
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()
```
No
| 23,293
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarp is working on a new operating system called BerOS. He asks you to help with implementation of a file suggestion feature.
There are n files on hard drive and their names are f_1, f_2, ..., f_n. Any file name contains between 1 and 8 characters, inclusive. All file names are unique.
The file suggestion feature handles queries, each represented by a string s. For each query s it should count number of files containing s as a substring (i.e. some continuous segment of characters in a file name equals s) and suggest any such file name.
For example, if file names are "read.me", "hosts", "ops", and "beros.18", and the query is "os", the number of matched files is 2 (two file names contain "os" as a substring) and suggested file name can be either "hosts" or "beros.18".
Input
The first line of the input contains integer n (1 ≤ n ≤ 10000) — the total number of files.
The following n lines contain file names, one per line. The i-th line contains f_i — the name of the i-th file. Each file name contains between 1 and 8 characters, inclusive. File names contain only lowercase Latin letters, digits and dot characters ('.'). Any sequence of valid characters can be a file name (for example, in BerOS ".", ".." and "..." are valid file names). All file names are unique.
The following line contains integer q (1 ≤ q ≤ 50000) — the total number of queries.
The following q lines contain queries s_1, s_2, ..., s_q, one per line. Each s_j has length between 1 and 8 characters, inclusive. It contains only lowercase Latin letters, digits and dot characters ('.').
Output
Print q lines, one per query. The j-th line should contain the response on the j-th query — two values c_j and t_j, where
* c_j is the number of matched files for the j-th query,
* t_j is the name of any file matched by the j-th query. If there is no such file, print a single character '-' instead. If there are multiple matched files, print any.
Example
Input
4
test
contests
test.
.test
6
ts
.
st.
.test
contes.
st
Output
1 contests
2 .test
1 test.
1 .test
0 -
4 test.
Tags: brute force, implementation
Correct Solution:
```
import re
import sys
exit=sys.exit
from bisect import bisect_left as bsl,bisect_right as bsr
from collections import Counter,defaultdict as ddict,deque
from functools import lru_cache
cache=lru_cache(None)
from heapq import *
from itertools import *
from math import inf
from pprint import pprint as pp
enum=enumerate
ri=lambda:int(rln())
ris=lambda:list(map(int,rfs()))
rln=sys.stdin.readline
rl=lambda:rln().rstrip('\n')
rfs=lambda:rln().split()
mod=1000000007
d4=[(0,-1),(1,0),(0,1),(-1,0)]
d8=[(-1,-1),(0,-1),(1,-1),(-1,0),(1,0),(-1,1),(0,1),(1,1)]
########################################################################
n=ri()
d=ddict(lambda:[0,''])
for _ in range(n):
s=rl()
k=len(s)
S=set()
for i in range(k):
for j in range(i,k):
S.add(s[i:j+1])
for t in S:
d[t][0]+=1
if d[t][0]==1:
d[t][1]=s
q=ri()
for _ in range(q):
s=rl()
if s not in d:
print(0,'-')
continue
print(*d[s])
```
| 23,865
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarp is working on a new operating system called BerOS. He asks you to help with implementation of a file suggestion feature.
There are n files on hard drive and their names are f_1, f_2, ..., f_n. Any file name contains between 1 and 8 characters, inclusive. All file names are unique.
The file suggestion feature handles queries, each represented by a string s. For each query s it should count number of files containing s as a substring (i.e. some continuous segment of characters in a file name equals s) and suggest any such file name.
For example, if file names are "read.me", "hosts", "ops", and "beros.18", and the query is "os", the number of matched files is 2 (two file names contain "os" as a substring) and suggested file name can be either "hosts" or "beros.18".
Input
The first line of the input contains integer n (1 ≤ n ≤ 10000) — the total number of files.
The following n lines contain file names, one per line. The i-th line contains f_i — the name of the i-th file. Each file name contains between 1 and 8 characters, inclusive. File names contain only lowercase Latin letters, digits and dot characters ('.'). Any sequence of valid characters can be a file name (for example, in BerOS ".", ".." and "..." are valid file names). All file names are unique.
The following line contains integer q (1 ≤ q ≤ 50000) — the total number of queries.
The following q lines contain queries s_1, s_2, ..., s_q, one per line. Each s_j has length between 1 and 8 characters, inclusive. It contains only lowercase Latin letters, digits and dot characters ('.').
Output
Print q lines, one per query. The j-th line should contain the response on the j-th query — two values c_j and t_j, where
* c_j is the number of matched files for the j-th query,
* t_j is the name of any file matched by the j-th query. If there is no such file, print a single character '-' instead. If there are multiple matched files, print any.
Example
Input
4
test
contests
test.
.test
6
ts
.
st.
.test
contes.
st
Output
1 contests
2 .test
1 test.
1 .test
0 -
4 test.
Tags: brute force, implementation
Correct Solution:
```
# -*- coding:utf-8 -*-
"""
created by shuangquan.huang at 11/3/18
"""
import collections
N = int(input())
subs = collections.defaultdict(int)
subi = collections.defaultdict(int)
files = []
for fi in range(N):
f = input()
files.append(f)
ss = set()
for i in range(len(f)):
for j in range(i+1, len(f)+1):
s = f[i: j]
ss.add(s)
subi[s] = fi
for s in ss:
subs[s] += 1
Q = int(input())
qs = [input() for _ in range(Q)]
ans = []
for s in qs:
count = subs[s]
af = files[subi[s]] if count > 0 else '-'
ans.append('{} {}'.format(count, af))
print('\n'.join(ans))
```
| 23,866
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarp is working on a new operating system called BerOS. He asks you to help with implementation of a file suggestion feature.
There are n files on hard drive and their names are f_1, f_2, ..., f_n. Any file name contains between 1 and 8 characters, inclusive. All file names are unique.
The file suggestion feature handles queries, each represented by a string s. For each query s it should count number of files containing s as a substring (i.e. some continuous segment of characters in a file name equals s) and suggest any such file name.
For example, if file names are "read.me", "hosts", "ops", and "beros.18", and the query is "os", the number of matched files is 2 (two file names contain "os" as a substring) and suggested file name can be either "hosts" or "beros.18".
Input
The first line of the input contains integer n (1 ≤ n ≤ 10000) — the total number of files.
The following n lines contain file names, one per line. The i-th line contains f_i — the name of the i-th file. Each file name contains between 1 and 8 characters, inclusive. File names contain only lowercase Latin letters, digits and dot characters ('.'). Any sequence of valid characters can be a file name (for example, in BerOS ".", ".." and "..." are valid file names). All file names are unique.
The following line contains integer q (1 ≤ q ≤ 50000) — the total number of queries.
The following q lines contain queries s_1, s_2, ..., s_q, one per line. Each s_j has length between 1 and 8 characters, inclusive. It contains only lowercase Latin letters, digits and dot characters ('.').
Output
Print q lines, one per query. The j-th line should contain the response on the j-th query — two values c_j and t_j, where
* c_j is the number of matched files for the j-th query,
* t_j is the name of any file matched by the j-th query. If there is no such file, print a single character '-' instead. If there are multiple matched files, print any.
Example
Input
4
test
contests
test.
.test
6
ts
.
st.
.test
contes.
st
Output
1 contests
2 .test
1 test.
1 .test
0 -
4 test.
Tags: brute force, implementation
Correct Solution:
```
def func1(s,i,index,dict1):
if(i==len(s)):
return
sx=''
for j in range(i,len(s)):
sx+=s[j]
try:
if(dict1[sx][1]!=index):
dict1[sx][0]+=1
dict1[sx][1]=index
except:
KeyError
dict1[sx]=[1,index]
func1(s,i+1,index,dict1)
return
n=int(input())
arr=[]
dict1={}
for i in range(n):
s=str(input())
arr.append(s)
func1(s,0,i,dict1)
q=int(input())
for i in range(q):
s=str(input())
#print(dict1['ts'])
try:
val1=dict1[s][0]
val2=arr[dict1[s][1]]
print(val1,val2)
except:
KeyError
print(0,'-')
```
| 23,867
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarp is working on a new operating system called BerOS. He asks you to help with implementation of a file suggestion feature.
There are n files on hard drive and their names are f_1, f_2, ..., f_n. Any file name contains between 1 and 8 characters, inclusive. All file names are unique.
The file suggestion feature handles queries, each represented by a string s. For each query s it should count number of files containing s as a substring (i.e. some continuous segment of characters in a file name equals s) and suggest any such file name.
For example, if file names are "read.me", "hosts", "ops", and "beros.18", and the query is "os", the number of matched files is 2 (two file names contain "os" as a substring) and suggested file name can be either "hosts" or "beros.18".
Input
The first line of the input contains integer n (1 ≤ n ≤ 10000) — the total number of files.
The following n lines contain file names, one per line. The i-th line contains f_i — the name of the i-th file. Each file name contains between 1 and 8 characters, inclusive. File names contain only lowercase Latin letters, digits and dot characters ('.'). Any sequence of valid characters can be a file name (for example, in BerOS ".", ".." and "..." are valid file names). All file names are unique.
The following line contains integer q (1 ≤ q ≤ 50000) — the total number of queries.
The following q lines contain queries s_1, s_2, ..., s_q, one per line. Each s_j has length between 1 and 8 characters, inclusive. It contains only lowercase Latin letters, digits and dot characters ('.').
Output
Print q lines, one per query. The j-th line should contain the response on the j-th query — two values c_j and t_j, where
* c_j is the number of matched files for the j-th query,
* t_j is the name of any file matched by the j-th query. If there is no such file, print a single character '-' instead. If there are multiple matched files, print any.
Example
Input
4
test
contests
test.
.test
6
ts
.
st.
.test
contes.
st
Output
1 contests
2 .test
1 test.
1 .test
0 -
4 test.
Tags: brute force, implementation
Correct Solution:
```
## necessary imports
import sys
input = sys.stdin.readline
from math import ceil, floor, factorial;
# swap_array function
def swaparr(arr, a,b):
temp = arr[a];
arr[a] = arr[b];
arr[b] = temp
## gcd function
def gcd(a,b):
if a == 0:
return b
return gcd(b%a, a)
## nCr function efficient using Binomial Cofficient
def nCr(n, k):
if(k > n - k):
k = n - k
res = 1
for i in range(k):
res = res * (n - i)
res = res / (i + 1)
return int(res)
## upper bound function code -- such that e in a[:i] e < x;
def upper_bound(a, x, lo=0):
hi = len(a)
while lo < hi:
mid = (lo+hi)//2
if a[mid] < x:
lo = mid+1
else:
hi = mid
return lo
## prime factorization
def primefs(n):
## if n == 1 ## calculating primes
primes = {}
while(n%2 == 0):
primes[2] = primes.get(2, 0) + 1
n = n//2
for i in range(3, int(n**0.5)+2, 2):
while(n%i == 0):
primes[i] = primes.get(i, 0) + 1
n = n//i
if n > 2:
primes[n] = primes.get(n, 0) + 1
## prime factoriazation of n is stored in dictionary
## primes and can be accesed. O(sqrt n)
return primes
## MODULAR EXPONENTIATION FUNCTION
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
x = (x * x) % p
return res
## DISJOINT SET UNINON FUNCTIONS
def swap(a,b):
temp = a
a = b
b = temp
return a,b
# find function with path compression included (recursive)
# def find(x, link):
# if link[x] == x:
# return x
# link[x] = find(link[x], link);
# return link[x];
# find function with path compression (ITERATIVE)
def find(x, link):
p = x;
while( p != link[p]):
p = link[p];
while( x != p):
nex = link[x];
link[x] = p;
x = nex;
return p;
# the union function which makes union(x,y)
# of two nodes x and y
def union(x, y, link, size):
x = find(x, link)
y = find(y, link)
if size[x] < size[y]:
x,y = swap(x,y)
if x != y:
size[x] += size[y]
link[y] = x
## returns an array of boolean if primes or not USING SIEVE OF ERATOSTHANES
def sieve(n):
prime = [True for i in range(n+1)]
p = 2
while (p * p <= n):
if (prime[p] == True):
for i in range(p * p, n+1, p):
prime[i] = False
p += 1
return prime
#### PRIME FACTORIZATION IN O(log n) using Sieve ####
MAXN = int(1e6 + 5)
def spf_sieve():
spf[1] = 1;
for i in range(2, MAXN):
spf[i] = i;
for i in range(4, MAXN, 2):
spf[i] = 2;
for i in range(3, ceil(MAXN ** 0.5), 2):
if spf[i] == i:
for j in range(i*i, MAXN, i):
if spf[j] == j:
spf[j] = i;
## function for storing smallest prime factors (spf) in the array
################## un-comment below 2 lines when using factorization #################
# spf = [0 for i in range(MAXN)]
# spf_sieve()
def factoriazation(x):
ret = {};
while x != 1:
ret[spf[x]] = ret.get(spf[x], 0) + 1;
x = x//spf[x]
return ret
## this function is useful for multiple queries only, o/w use
## primefs function above. complexity O(log n)
## taking integer array input
def int_array():
return list(map(int, input().strip().split()))
## taking string array input
def str_array():
return input().strip().split();
#defining a couple constants
MOD = int(1e9)+7;
CMOD = 998244353;
INF = float('inf'); NINF = -float('inf');
################### ---------------- TEMPLATE ENDS HERE ---------------- ###################
count = {}; dick = {};
n = int(input());
for __ in range(n):
s = input().strip();
this = set();
for i in range(len(s)):
x = '';
for j in range(i, len(s)):
x += s[j];
if x in this:
continue;
this.add(x);
dick[x] = s;
count[x] = count.get(x, 0) + 1;
q = int(input());
for __ in range(q):
s = input().strip();
if s in dick:
x = count[s];
y = dick[s];
else:
x = 0;
y = '-';
print(*(x, y));
```
| 23,868
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarp is working on a new operating system called BerOS. He asks you to help with implementation of a file suggestion feature.
There are n files on hard drive and their names are f_1, f_2, ..., f_n. Any file name contains between 1 and 8 characters, inclusive. All file names are unique.
The file suggestion feature handles queries, each represented by a string s. For each query s it should count number of files containing s as a substring (i.e. some continuous segment of characters in a file name equals s) and suggest any such file name.
For example, if file names are "read.me", "hosts", "ops", and "beros.18", and the query is "os", the number of matched files is 2 (two file names contain "os" as a substring) and suggested file name can be either "hosts" or "beros.18".
Input
The first line of the input contains integer n (1 ≤ n ≤ 10000) — the total number of files.
The following n lines contain file names, one per line. The i-th line contains f_i — the name of the i-th file. Each file name contains between 1 and 8 characters, inclusive. File names contain only lowercase Latin letters, digits and dot characters ('.'). Any sequence of valid characters can be a file name (for example, in BerOS ".", ".." and "..." are valid file names). All file names are unique.
The following line contains integer q (1 ≤ q ≤ 50000) — the total number of queries.
The following q lines contain queries s_1, s_2, ..., s_q, one per line. Each s_j has length between 1 and 8 characters, inclusive. It contains only lowercase Latin letters, digits and dot characters ('.').
Output
Print q lines, one per query. The j-th line should contain the response on the j-th query — two values c_j and t_j, where
* c_j is the number of matched files for the j-th query,
* t_j is the name of any file matched by the j-th query. If there is no such file, print a single character '-' instead. If there are multiple matched files, print any.
Example
Input
4
test
contests
test.
.test
6
ts
.
st.
.test
contes.
st
Output
1 contests
2 .test
1 test.
1 .test
0 -
4 test.
Tags: brute force, implementation
Correct Solution:
```
if __name__ == "__main__":
Map = {}
siz = {}
n = int(input())
for i in range(n):
str = input()
MMap = {}
for j in range(0,len(str)):
t = ""
for k in range(j,len(str)):
t += str[k]
MMap[t] = 1
for x in MMap:
if not x in Map:
Map[x] = str
siz[x] = 0
siz[x] +=1
#for x in Map:
#print(x,Map[x])
q = int(input())
for i in range(q):
str = input()
if str in Map:
print(siz[str], Map[str])
else:
print("0 -")
```
| 23,869
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarp is working on a new operating system called BerOS. He asks you to help with implementation of a file suggestion feature.
There are n files on hard drive and their names are f_1, f_2, ..., f_n. Any file name contains between 1 and 8 characters, inclusive. All file names are unique.
The file suggestion feature handles queries, each represented by a string s. For each query s it should count number of files containing s as a substring (i.e. some continuous segment of characters in a file name equals s) and suggest any such file name.
For example, if file names are "read.me", "hosts", "ops", and "beros.18", and the query is "os", the number of matched files is 2 (two file names contain "os" as a substring) and suggested file name can be either "hosts" or "beros.18".
Input
The first line of the input contains integer n (1 ≤ n ≤ 10000) — the total number of files.
The following n lines contain file names, one per line. The i-th line contains f_i — the name of the i-th file. Each file name contains between 1 and 8 characters, inclusive. File names contain only lowercase Latin letters, digits and dot characters ('.'). Any sequence of valid characters can be a file name (for example, in BerOS ".", ".." and "..." are valid file names). All file names are unique.
The following line contains integer q (1 ≤ q ≤ 50000) — the total number of queries.
The following q lines contain queries s_1, s_2, ..., s_q, one per line. Each s_j has length between 1 and 8 characters, inclusive. It contains only lowercase Latin letters, digits and dot characters ('.').
Output
Print q lines, one per query. The j-th line should contain the response on the j-th query — two values c_j and t_j, where
* c_j is the number of matched files for the j-th query,
* t_j is the name of any file matched by the j-th query. If there is no such file, print a single character '-' instead. If there are multiple matched files, print any.
Example
Input
4
test
contests
test.
.test
6
ts
.
st.
.test
contes.
st
Output
1 contests
2 .test
1 test.
1 .test
0 -
4 test.
Tags: brute force, implementation
Correct Solution:
```
###################
# 18th August 2019.
###################
##########################################################################
# Getting fileCount from Codeforces.
fileCount = int(input())
# Method to generate all substrings of given string.
from itertools import combinations as cmb
def generateSubstringsFor(string):
length = len(string) + 1
return [string[x:y] for x, y in cmb(range(length), r=2)]
# HashMap mapping substrings to set of containing strings.
stringMap = {}
for i in range(fileCount):
newFile = input()
# Generating entry for new file.
for string in generateSubstringsFor(newFile):
# Case Set has been created.
if not string in stringMap:
stringMap[string] = set([newFile])
# Case First Entry.
else: stringMap[string].add(newFile)
# Method to entertain a single query.
def outputForQuery(query):
if query in stringMap:
return str(len(stringMap[query]))+" "+next(iter(stringMap[query]))
else: return "0 - "
# We now entertain all requests from Codeforces.
queryCount = int(input())
for i in range(queryCount): print(outputForQuery(input()))
##########################################################################
########################################
# Programming-Credits atifcppprogrammer.
########################################
```
| 23,870
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarp is working on a new operating system called BerOS. He asks you to help with implementation of a file suggestion feature.
There are n files on hard drive and their names are f_1, f_2, ..., f_n. Any file name contains between 1 and 8 characters, inclusive. All file names are unique.
The file suggestion feature handles queries, each represented by a string s. For each query s it should count number of files containing s as a substring (i.e. some continuous segment of characters in a file name equals s) and suggest any such file name.
For example, if file names are "read.me", "hosts", "ops", and "beros.18", and the query is "os", the number of matched files is 2 (two file names contain "os" as a substring) and suggested file name can be either "hosts" or "beros.18".
Input
The first line of the input contains integer n (1 ≤ n ≤ 10000) — the total number of files.
The following n lines contain file names, one per line. The i-th line contains f_i — the name of the i-th file. Each file name contains between 1 and 8 characters, inclusive. File names contain only lowercase Latin letters, digits and dot characters ('.'). Any sequence of valid characters can be a file name (for example, in BerOS ".", ".." and "..." are valid file names). All file names are unique.
The following line contains integer q (1 ≤ q ≤ 50000) — the total number of queries.
The following q lines contain queries s_1, s_2, ..., s_q, one per line. Each s_j has length between 1 and 8 characters, inclusive. It contains only lowercase Latin letters, digits and dot characters ('.').
Output
Print q lines, one per query. The j-th line should contain the response on the j-th query — two values c_j and t_j, where
* c_j is the number of matched files for the j-th query,
* t_j is the name of any file matched by the j-th query. If there is no such file, print a single character '-' instead. If there are multiple matched files, print any.
Example
Input
4
test
contests
test.
.test
6
ts
.
st.
.test
contes.
st
Output
1 contests
2 .test
1 test.
1 .test
0 -
4 test.
Tags: brute force, implementation
Correct Solution:
```
from collections import defaultdict
N = int(input())
F = []
for i in range(N):
F.append(input())
dic = defaultdict(set)
for i in range(N):
t = F[i]
M = len(t)
for j in range(M):
for k in range(j + 1, M + 1):
dic[t[j: k]].add(F[i])
Q = int(input())
for i in range(Q):
s = input()
if s in dic:
print(len(dic[s]), list(dic[s])[0])
else:
print("0 -")
```
| 23,871
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarp is working on a new operating system called BerOS. He asks you to help with implementation of a file suggestion feature.
There are n files on hard drive and their names are f_1, f_2, ..., f_n. Any file name contains between 1 and 8 characters, inclusive. All file names are unique.
The file suggestion feature handles queries, each represented by a string s. For each query s it should count number of files containing s as a substring (i.e. some continuous segment of characters in a file name equals s) and suggest any such file name.
For example, if file names are "read.me", "hosts", "ops", and "beros.18", and the query is "os", the number of matched files is 2 (two file names contain "os" as a substring) and suggested file name can be either "hosts" or "beros.18".
Input
The first line of the input contains integer n (1 ≤ n ≤ 10000) — the total number of files.
The following n lines contain file names, one per line. The i-th line contains f_i — the name of the i-th file. Each file name contains between 1 and 8 characters, inclusive. File names contain only lowercase Latin letters, digits and dot characters ('.'). Any sequence of valid characters can be a file name (for example, in BerOS ".", ".." and "..." are valid file names). All file names are unique.
The following line contains integer q (1 ≤ q ≤ 50000) — the total number of queries.
The following q lines contain queries s_1, s_2, ..., s_q, one per line. Each s_j has length between 1 and 8 characters, inclusive. It contains only lowercase Latin letters, digits and dot characters ('.').
Output
Print q lines, one per query. The j-th line should contain the response on the j-th query — two values c_j and t_j, where
* c_j is the number of matched files for the j-th query,
* t_j is the name of any file matched by the j-th query. If there is no such file, print a single character '-' instead. If there are multiple matched files, print any.
Example
Input
4
test
contests
test.
.test
6
ts
.
st.
.test
contes.
st
Output
1 contests
2 .test
1 test.
1 .test
0 -
4 test.
Tags: brute force, implementation
Correct Solution:
```
# https://codeforces.com/problemset/problem/1070/H
from sys import stdin, exit
from typing import List, Tuple
sub_strings = dict()
files_num = int(stdin.readline().rstrip())
for _id in range(files_num):
f_name = stdin.readline().rstrip()
for i in range(len(f_name)):
for j in range(i + 1, len(f_name) + 1):
key = f_name[i:j]
if key not in sub_strings:
sub_strings[key] = [1, f_name, _id]
else:
rez = sub_strings[key]
if rez[2] != _id:
rez[2] = _id
sub_strings[key][0] += 1
queries = int(stdin.readline().rstrip())
for _ in range(queries):
query = stdin.readline().rstrip()
if query in sub_strings:
rez = sub_strings[query]
print(rez[0], ' ', rez[1])
else:
print(0, ' ', '-')
```
| 23,872
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
In the popular spreadsheets systems (for example, in Excel) the following numeration of columns is used. The first column has number A, the second — number B, etc. till column 26 that is marked by Z. Then there are two-letter numbers: column 27 has number AA, 28 — AB, column 52 is marked by AZ. After ZZ there follow three-letter numbers, etc.
The rows are marked by integer numbers starting with 1. The cell name is the concatenation of the column and the row numbers. For example, BC23 is the name for the cell that is in column 55, row 23.
Sometimes another numeration system is used: RXCY, where X and Y are integer numbers, showing the column and the row numbers respectfully. For instance, R23C55 is the cell from the previous example.
Your task is to write a program that reads the given sequence of cell coordinates and produce each item written according to the rules of another numeration system.
Input
The first line of the input contains integer number n (1 ≤ n ≤ 105), the number of coordinates in the test. Then there follow n lines, each of them contains coordinates. All the coordinates are correct, there are no cells with the column and/or the row numbers larger than 106 .
Output
Write n lines, each line should contain a cell coordinates in the other numeration system.
Examples
Input
2
R23C55
BC23
Output
BC23
R23C55
Tags: implementation, math
Correct Solution:
```
import string
import re
alphabet=string.ascii_uppercase
n=input()
n=int(n)
def numer1(inp):
inp=inp.replace("R","")
inp=inp.replace("C"," ")
row,column=inp.split(" ",1)
column=int(column)
columnalpha=[]
over=False
while not over:
a=(column-1)//26
b=column-a*26
if b==0:
b=26
column=a
columnalpha.insert(0,alphabet[b-1])
if column==0:
over=True
print("".join(columnalpha)+row)
def numer2(inp):
row="".join(list(filter(str.isdigit,inp)))
columnalpha=list(filter(str.isalpha,inp))
column=0
for i in range(0,len(columnalpha)):
column+=(alphabet.index(columnalpha[i])+1)*26**(len(columnalpha)-1-i)
column=str(column)
print("R"+row+"C"+column)
for i in range(0,n):
inp=input()
numertypeR=len(re.findall(r"R"+"\d",inp))
numertypeC=len(re.findall(r"C"+"\d",inp))
if numertypeR==1 and numertypeC==1:
numer1(inp)
else:
numer2(inp)
```
| 24,081
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Email address in Berland is a string of the form A@B, where A and B are arbitrary strings consisting of small Latin letters.
Bob is a system administrator in «Bersoft» company. He keeps a list of email addresses of the company's staff. This list is as a large string, where all addresses are written in arbitrary order, separated by commas. The same address can be written more than once.
Suddenly, because of unknown reasons, all commas in Bob's list disappeared. Now Bob has a string, where all addresses are written one after another without any separators, and there is impossible to determine, where the boundaries between addresses are. Unfortunately, on the same day his chief asked him to bring the initial list of addresses. Now Bob wants to disjoin addresses in some valid way. Help him to do that.
Input
The first line contains the list of addresses without separators. The length of this string is between 1 and 200, inclusive. The string consists only from small Latin letters and characters «@».
Output
If there is no list of the valid (according to the Berland rules) email addresses such that after removing all commas it coincides with the given string, output No solution. In the other case, output the list. The same address can be written in this list more than once. If there are several solutions, output any of them.
Examples
Input
a@aa@a
Output
a@a,a@a
Input
a@a@a
Output
No solution
Input
@aa@a
Output
No solution
Tags: greedy, implementation, strings
Correct Solution:
```
s=input()
au=[pos for pos,char in enumerate(s) if char=='@']
dis=[au[i+1]-au[i] for i in range(len(au)-1)]
dis=[1 for i in dis if i<=2]
if len(au)==0 or au[0]==0 or au[-1]==len(s)-1 or sum(dis)>0:
print("No solution")
else:
if len(au)==1:
print(s)
else:
res=[]
i=0
j=0
m=au[j]+2
while j<len(au):
res.append(s[i:m])
i=m
if i>len(s):
break
j+=1
if j==len(au)-1:
m=len(s)+1
else:
m=au[j]+2
print(*res,sep=",")
```
| 24,136
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Email address in Berland is a string of the form A@B, where A and B are arbitrary strings consisting of small Latin letters.
Bob is a system administrator in «Bersoft» company. He keeps a list of email addresses of the company's staff. This list is as a large string, where all addresses are written in arbitrary order, separated by commas. The same address can be written more than once.
Suddenly, because of unknown reasons, all commas in Bob's list disappeared. Now Bob has a string, where all addresses are written one after another without any separators, and there is impossible to determine, where the boundaries between addresses are. Unfortunately, on the same day his chief asked him to bring the initial list of addresses. Now Bob wants to disjoin addresses in some valid way. Help him to do that.
Input
The first line contains the list of addresses without separators. The length of this string is between 1 and 200, inclusive. The string consists only from small Latin letters and characters «@».
Output
If there is no list of the valid (according to the Berland rules) email addresses such that after removing all commas it coincides with the given string, output No solution. In the other case, output the list. The same address can be written in this list more than once. If there are several solutions, output any of them.
Examples
Input
a@aa@a
Output
a@a,a@a
Input
a@a@a
Output
No solution
Input
@aa@a
Output
No solution
Tags: greedy, implementation, strings
Correct Solution:
```
#amros
s=input()
t=[]
k=0
y=1
while 1:
a=s.find('@',k+1)
if a<0:break
r=s[k:a+2]
if r.count('@')==0 or r[0]=='@'or r[-1]=='@':y=0
t+=[r];k=a+2
if t and s[k:].count('@')==0:t[-1]+=s[k:]
p=''
for i in t:p+=i
print(['No solution',','.join(t)][p==s and y])
```
| 24,137
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Email address in Berland is a string of the form A@B, where A and B are arbitrary strings consisting of small Latin letters.
Bob is a system administrator in «Bersoft» company. He keeps a list of email addresses of the company's staff. This list is as a large string, where all addresses are written in arbitrary order, separated by commas. The same address can be written more than once.
Suddenly, because of unknown reasons, all commas in Bob's list disappeared. Now Bob has a string, where all addresses are written one after another without any separators, and there is impossible to determine, where the boundaries between addresses are. Unfortunately, on the same day his chief asked him to bring the initial list of addresses. Now Bob wants to disjoin addresses in some valid way. Help him to do that.
Input
The first line contains the list of addresses without separators. The length of this string is between 1 and 200, inclusive. The string consists only from small Latin letters and characters «@».
Output
If there is no list of the valid (according to the Berland rules) email addresses such that after removing all commas it coincides with the given string, output No solution. In the other case, output the list. The same address can be written in this list more than once. If there are several solutions, output any of them.
Examples
Input
a@aa@a
Output
a@a,a@a
Input
a@a@a
Output
No solution
Input
@aa@a
Output
No solution
Tags: greedy, implementation, strings
Correct Solution:
```
from sys import stdout
a=input()
c=list(a.split('@'))
while '' in c:
c.remove('')
if a.count('@')==0:
exit(print('No solution'))
if a.count('@')!=len(c)-1:
exit(print('No solution'))
if any(len(i)==1 for i in c[1:len(c)-1]):
exit(print('No solution'))
stdout.write(c[0]+'@')
for i in range(1,len(c)-1):
stdout.write(c[i][:len(c[i])//2]+','+c[i][len(c[i])//2:]+'@')
stdout.write(c[-1])
```
| 24,138
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Email address in Berland is a string of the form A@B, where A and B are arbitrary strings consisting of small Latin letters.
Bob is a system administrator in «Bersoft» company. He keeps a list of email addresses of the company's staff. This list is as a large string, where all addresses are written in arbitrary order, separated by commas. The same address can be written more than once.
Suddenly, because of unknown reasons, all commas in Bob's list disappeared. Now Bob has a string, where all addresses are written one after another without any separators, and there is impossible to determine, where the boundaries between addresses are. Unfortunately, on the same day his chief asked him to bring the initial list of addresses. Now Bob wants to disjoin addresses in some valid way. Help him to do that.
Input
The first line contains the list of addresses without separators. The length of this string is between 1 and 200, inclusive. The string consists only from small Latin letters and characters «@».
Output
If there is no list of the valid (according to the Berland rules) email addresses such that after removing all commas it coincides with the given string, output No solution. In the other case, output the list. The same address can be written in this list more than once. If there are several solutions, output any of them.
Examples
Input
a@aa@a
Output
a@a,a@a
Input
a@a@a
Output
No solution
Input
@aa@a
Output
No solution
Tags: greedy, implementation, strings
Correct Solution:
```
a=input().split('@')
n=len(a)
b=[]
if n>=2:
for i in range(n):
if len(a[i])>int(i!=0 and i!=n-1):
if i!=0 and i!=n-1:
b.append(a[i-1][min(1,i-1):]+'@'+a[i][0])
elif i==n-1:
b.append(a[i-1][min(1,i-1):]+'@'+a[i])
else:
print('No solution')
break
else:
c=b[0]
for i in range(1,len(b)):
c+=','+b[i]
print(c)
else:
print('No solution')
```
| 24,139
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Email address in Berland is a string of the form A@B, where A and B are arbitrary strings consisting of small Latin letters.
Bob is a system administrator in «Bersoft» company. He keeps a list of email addresses of the company's staff. This list is as a large string, where all addresses are written in arbitrary order, separated by commas. The same address can be written more than once.
Suddenly, because of unknown reasons, all commas in Bob's list disappeared. Now Bob has a string, where all addresses are written one after another without any separators, and there is impossible to determine, where the boundaries between addresses are. Unfortunately, on the same day his chief asked him to bring the initial list of addresses. Now Bob wants to disjoin addresses in some valid way. Help him to do that.
Input
The first line contains the list of addresses without separators. The length of this string is between 1 and 200, inclusive. The string consists only from small Latin letters and characters «@».
Output
If there is no list of the valid (according to the Berland rules) email addresses such that after removing all commas it coincides with the given string, output No solution. In the other case, output the list. The same address can be written in this list more than once. If there are several solutions, output any of them.
Examples
Input
a@aa@a
Output
a@a,a@a
Input
a@a@a
Output
No solution
Input
@aa@a
Output
No solution
Tags: greedy, implementation, strings
Correct Solution:
```
a = input()
b = a.split("@")
ans = []
flag = True
for i in b[1:-1]:
if len(i) < 2:
flag = False
break
if len(b) < 2:
flag = False
if b[0] and b[-1] and flag:
ind = 0
index_list = []
str_len = len(a)
temp = ""
j = 0
ans = []
while j != str_len:
temp += a[j]
if a[j] == "@":
temp += a[j + 1]
ans.append(temp)
temp = ""
j += 1
j += 1
ans[-1] = ans[-1] + temp
print(",".join(ans))
else:
print("No solution")
```
| 24,140
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Email address in Berland is a string of the form A@B, where A and B are arbitrary strings consisting of small Latin letters.
Bob is a system administrator in «Bersoft» company. He keeps a list of email addresses of the company's staff. This list is as a large string, where all addresses are written in arbitrary order, separated by commas. The same address can be written more than once.
Suddenly, because of unknown reasons, all commas in Bob's list disappeared. Now Bob has a string, where all addresses are written one after another without any separators, and there is impossible to determine, where the boundaries between addresses are. Unfortunately, on the same day his chief asked him to bring the initial list of addresses. Now Bob wants to disjoin addresses in some valid way. Help him to do that.
Input
The first line contains the list of addresses without separators. The length of this string is between 1 and 200, inclusive. The string consists only from small Latin letters and characters «@».
Output
If there is no list of the valid (according to the Berland rules) email addresses such that after removing all commas it coincides with the given string, output No solution. In the other case, output the list. The same address can be written in this list more than once. If there are several solutions, output any of them.
Examples
Input
a@aa@a
Output
a@a,a@a
Input
a@a@a
Output
No solution
Input
@aa@a
Output
No solution
Tags: greedy, implementation, strings
Correct Solution:
```
import sys
from array import array # noqa: F401
def input():
return sys.stdin.buffer.readline().decode('utf-8')
s = input().rstrip()
ans = []
while s and s[0] != '@':
for i in range(len(s) - 1):
if s[i] == '@':
ans.append(s[:i + 2])
s = s[i + 2:]
break
else:
break
if s and '@' not in s and ans:
ans[-1] += s
s = ''
if not s and all(addr.count('@') == 1 for addr in ans):
print(','.join(ans))
else:
print('No solution')
```
| 24,141
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Email address in Berland is a string of the form A@B, where A and B are arbitrary strings consisting of small Latin letters.
Bob is a system administrator in «Bersoft» company. He keeps a list of email addresses of the company's staff. This list is as a large string, where all addresses are written in arbitrary order, separated by commas. The same address can be written more than once.
Suddenly, because of unknown reasons, all commas in Bob's list disappeared. Now Bob has a string, where all addresses are written one after another without any separators, and there is impossible to determine, where the boundaries between addresses are. Unfortunately, on the same day his chief asked him to bring the initial list of addresses. Now Bob wants to disjoin addresses in some valid way. Help him to do that.
Input
The first line contains the list of addresses without separators. The length of this string is between 1 and 200, inclusive. The string consists only from small Latin letters and characters «@».
Output
If there is no list of the valid (according to the Berland rules) email addresses such that after removing all commas it coincides with the given string, output No solution. In the other case, output the list. The same address can be written in this list more than once. If there are several solutions, output any of them.
Examples
Input
a@aa@a
Output
a@a,a@a
Input
a@a@a
Output
No solution
Input
@aa@a
Output
No solution
Tags: greedy, implementation, strings
Correct Solution:
```
def cf31B():
#print("Hello World")
from sys import stdin,stdout
inp = list(stdin.readline().strip().split('@'))
flag = True
if len(inp)>=2:
if len(inp[0])==0 or len(inp[-1])==0:
flag = False
if flag:
for i in range(1,len(inp)-1):
if len(inp[i]) < 2:
flag = False
break
else:
flag = False
answer = ""
if flag:
for i , j in enumerate(inp):
if i==0:
answer+=j
elif i==len(inp)-1:
answer+='@'+j
else:
answer+='@'+j[:-1]+','+j[-1]
else:
answer = "No solution"
stdout.write(answer+"\n")
if __name__=='__main__':
cf31B()
```
| 24,142
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Email address in Berland is a string of the form A@B, where A and B are arbitrary strings consisting of small Latin letters.
Bob is a system administrator in «Bersoft» company. He keeps a list of email addresses of the company's staff. This list is as a large string, where all addresses are written in arbitrary order, separated by commas. The same address can be written more than once.
Suddenly, because of unknown reasons, all commas in Bob's list disappeared. Now Bob has a string, where all addresses are written one after another without any separators, and there is impossible to determine, where the boundaries between addresses are. Unfortunately, on the same day his chief asked him to bring the initial list of addresses. Now Bob wants to disjoin addresses in some valid way. Help him to do that.
Input
The first line contains the list of addresses without separators. The length of this string is between 1 and 200, inclusive. The string consists only from small Latin letters and characters «@».
Output
If there is no list of the valid (according to the Berland rules) email addresses such that after removing all commas it coincides with the given string, output No solution. In the other case, output the list. The same address can be written in this list more than once. If there are several solutions, output any of them.
Examples
Input
a@aa@a
Output
a@a,a@a
Input
a@a@a
Output
No solution
Input
@aa@a
Output
No solution
Tags: greedy, implementation, strings
Correct Solution:
```
s=input()
n=len(s)
ans=[]
x=''
c=0
for i in range(n):
if i!=n-1:
if s[i+1]!='@':
x=x+s[i]
else:
if c==0:
x=x+s[i]
c=1
else:
ans.append(x)
x=''
x=x+s[i]
c=1
else:
x=x+s[i]
ans.append(x)
f=0
for i in range(len(ans)):
if ans[i][0]=='@' or ans[i][-1]=='@' or '@' not in ans[i]:
f=1
break
if f:
print('No solution')
else:
for i in range(len(ans)-1):
print(ans[i]+',',end='')
print(ans[-1])
```
| 24,143
|
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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.
Email address in Berland is a string of the form A@B, where A and B are arbitrary strings consisting of small Latin letters.
Bob is a system administrator in «Bersoft» company. He keeps a list of email addresses of the company's staff. This list is as a large string, where all addresses are written in arbitrary order, separated by commas. The same address can be written more than once.
Suddenly, because of unknown reasons, all commas in Bob's list disappeared. Now Bob has a string, where all addresses are written one after another without any separators, and there is impossible to determine, where the boundaries between addresses are. Unfortunately, on the same day his chief asked him to bring the initial list of addresses. Now Bob wants to disjoin addresses in some valid way. Help him to do that.
Input
The first line contains the list of addresses without separators. The length of this string is between 1 and 200, inclusive. The string consists only from small Latin letters and characters «@».
Output
If there is no list of the valid (according to the Berland rules) email addresses such that after removing all commas it coincides with the given string, output No solution. In the other case, output the list. The same address can be written in this list more than once. If there are several solutions, output any of them.
Examples
Input
a@aa@a
Output
a@a,a@a
Input
a@a@a
Output
No solution
Input
@aa@a
Output
No solution
Submitted Solution:
```
import sys
def input(): return sys.stdin.readline().strip()
def iinput(): return int(input())
def rinput(): return map(int, sys.stdin.readline().strip().split())
def get_list(): return list(map(int, sys.stdin.readline().strip().split()))
mod = int(1e9)+7
s = input()
l = len(s)
ans = []
prev = -1
flag = True
tot = s.count("@")
cnt = 0
if (s[0]=="@" or s[l-1]=="@" or tot==0):
print("No solution")
sys.exit(0)
for i in range(l):
if s[i]=="@":
bef = s[prev+1:i]
aft = s[i+1:]
if "@" in aft:
aft = aft[:aft.index("@")]
if (len(ans)>0 and len(bef)<1) or len(aft)==0:
flag = False
break
if cnt!=tot-1:
ans.append(bef+"@"+aft[0])
else:
ans.append(bef+"@"+aft)
prev = i+1
cnt+=1
# print(bef, aft)
if flag == False:
print("No solution")
else:
print(*ans, sep=",")
```
Yes
| 24,144
|
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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.
Email address in Berland is a string of the form A@B, where A and B are arbitrary strings consisting of small Latin letters.
Bob is a system administrator in «Bersoft» company. He keeps a list of email addresses of the company's staff. This list is as a large string, where all addresses are written in arbitrary order, separated by commas. The same address can be written more than once.
Suddenly, because of unknown reasons, all commas in Bob's list disappeared. Now Bob has a string, where all addresses are written one after another without any separators, and there is impossible to determine, where the boundaries between addresses are. Unfortunately, on the same day his chief asked him to bring the initial list of addresses. Now Bob wants to disjoin addresses in some valid way. Help him to do that.
Input
The first line contains the list of addresses without separators. The length of this string is between 1 and 200, inclusive. The string consists only from small Latin letters and characters «@».
Output
If there is no list of the valid (according to the Berland rules) email addresses such that after removing all commas it coincides with the given string, output No solution. In the other case, output the list. The same address can be written in this list more than once. If there are several solutions, output any of them.
Examples
Input
a@aa@a
Output
a@a,a@a
Input
a@a@a
Output
No solution
Input
@aa@a
Output
No solution
Submitted Solution:
```
def solution():
s = input()
if '@' not in s:
return "No solution"
mas = s.split('@')
if len(mas[0]) < 1 or len(mas[-1]) < 1:
return "No solution"
front = mas[0]
back = mas[-1]
mas = mas[1:len(mas) - 1]
for i in range(len(mas)):
if len(mas[i]) < 2:
return "No solution"
else:
mas[i] = mas[i][:len(mas[i]) // 2] + ',' + mas[i][len(mas[i]) // 2:]
return '@'.join([front] + mas + [back])
print(solution())
```
Yes
| 24,145
|
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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.
Email address in Berland is a string of the form A@B, where A and B are arbitrary strings consisting of small Latin letters.
Bob is a system administrator in «Bersoft» company. He keeps a list of email addresses of the company's staff. This list is as a large string, where all addresses are written in arbitrary order, separated by commas. The same address can be written more than once.
Suddenly, because of unknown reasons, all commas in Bob's list disappeared. Now Bob has a string, where all addresses are written one after another without any separators, and there is impossible to determine, where the boundaries between addresses are. Unfortunately, on the same day his chief asked him to bring the initial list of addresses. Now Bob wants to disjoin addresses in some valid way. Help him to do that.
Input
The first line contains the list of addresses without separators. The length of this string is between 1 and 200, inclusive. The string consists only from small Latin letters and characters «@».
Output
If there is no list of the valid (according to the Berland rules) email addresses such that after removing all commas it coincides with the given string, output No solution. In the other case, output the list. The same address can be written in this list more than once. If there are several solutions, output any of them.
Examples
Input
a@aa@a
Output
a@a,a@a
Input
a@a@a
Output
No solution
Input
@aa@a
Output
No solution
Submitted Solution:
```
s = input().split('@')
if len(s) > 1 and s[0] and s[-1] and min(map(len, s[1:-1] + ['__'])) > 1:
for i in range(1, len(s) - 1):
s[i] = s[i][0] + ',' + s[i][1:]
print('@'.join(s))
else:
print('No solution')
```
Yes
| 24,146
|
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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.
Email address in Berland is a string of the form A@B, where A and B are arbitrary strings consisting of small Latin letters.
Bob is a system administrator in «Bersoft» company. He keeps a list of email addresses of the company's staff. This list is as a large string, where all addresses are written in arbitrary order, separated by commas. The same address can be written more than once.
Suddenly, because of unknown reasons, all commas in Bob's list disappeared. Now Bob has a string, where all addresses are written one after another without any separators, and there is impossible to determine, where the boundaries between addresses are. Unfortunately, on the same day his chief asked him to bring the initial list of addresses. Now Bob wants to disjoin addresses in some valid way. Help him to do that.
Input
The first line contains the list of addresses without separators. The length of this string is between 1 and 200, inclusive. The string consists only from small Latin letters and characters «@».
Output
If there is no list of the valid (according to the Berland rules) email addresses such that after removing all commas it coincides with the given string, output No solution. In the other case, output the list. The same address can be written in this list more than once. If there are several solutions, output any of them.
Examples
Input
a@aa@a
Output
a@a,a@a
Input
a@a@a
Output
No solution
Input
@aa@a
Output
No solution
Submitted Solution:
```
a=input().split("@")
ans=a[0]
if len(a[0])==0 or len(a)<=1 or len(a[-1])==0:
print("No solution")
exit()
for u in range(1,len(a)-1):
if len(a[u])>1:
ans+="@"+a[u][0]+","+a[u][1:]
else:
print("No solution")
exit()
print(ans+"@"+a[-1])
```
Yes
| 24,147
|
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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.
Email address in Berland is a string of the form A@B, where A and B are arbitrary strings consisting of small Latin letters.
Bob is a system administrator in «Bersoft» company. He keeps a list of email addresses of the company's staff. This list is as a large string, where all addresses are written in arbitrary order, separated by commas. The same address can be written more than once.
Suddenly, because of unknown reasons, all commas in Bob's list disappeared. Now Bob has a string, where all addresses are written one after another without any separators, and there is impossible to determine, where the boundaries between addresses are. Unfortunately, on the same day his chief asked him to bring the initial list of addresses. Now Bob wants to disjoin addresses in some valid way. Help him to do that.
Input
The first line contains the list of addresses without separators. The length of this string is between 1 and 200, inclusive. The string consists only from small Latin letters and characters «@».
Output
If there is no list of the valid (according to the Berland rules) email addresses such that after removing all commas it coincides with the given string, output No solution. In the other case, output the list. The same address can be written in this list more than once. If there are several solutions, output any of them.
Examples
Input
a@aa@a
Output
a@a,a@a
Input
a@a@a
Output
No solution
Input
@aa@a
Output
No solution
Submitted Solution:
```
s = input()
prev = 0
lis = []
start = 0
flag = 0
for i in range(len(s)):
if s[i] == '@' and prev == 0:
if i-prev<=0:
flag = 1
break
prev= i
elif s[i] == '@':
lis.append(s[start:prev+2])
start = prev+2
prev = i
if flag:
print("No solution")
else:
if '@' in s[start:] and s[len(s)-1]!='@':
lis.append(s[start:])
for i in range(len(lis)-1):
print(lis[i], end = ",")
print(lis[len(lis)-1])
else:
print("No solution")
```
No
| 24,148
|
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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.
Email address in Berland is a string of the form A@B, where A and B are arbitrary strings consisting of small Latin letters.
Bob is a system administrator in «Bersoft» company. He keeps a list of email addresses of the company's staff. This list is as a large string, where all addresses are written in arbitrary order, separated by commas. The same address can be written more than once.
Suddenly, because of unknown reasons, all commas in Bob's list disappeared. Now Bob has a string, where all addresses are written one after another without any separators, and there is impossible to determine, where the boundaries between addresses are. Unfortunately, on the same day his chief asked him to bring the initial list of addresses. Now Bob wants to disjoin addresses in some valid way. Help him to do that.
Input
The first line contains the list of addresses without separators. The length of this string is between 1 and 200, inclusive. The string consists only from small Latin letters and characters «@».
Output
If there is no list of the valid (according to the Berland rules) email addresses such that after removing all commas it coincides with the given string, output No solution. In the other case, output the list. The same address can be written in this list more than once. If there are several solutions, output any of them.
Examples
Input
a@aa@a
Output
a@a,a@a
Input
a@a@a
Output
No solution
Input
@aa@a
Output
No solution
Submitted Solution:
```
string=input()
if len(string)==1:
print('No solution')
exit()
lst=string.split('@')
middle=lst[1:-1]
if not( lst[0].isalpha() and lst[-1].isalpha()):
print('No solution')
exit()
if len(lst)==2:
print(string)
exit()
if not all(list(map(lambda x:len(x)>1 and x.isalpha(),middle))):
print('No solution')
exit()
first=lst[0]
emails=[]
for i in middle:
last=i[0]
emails.append(first+'@'+last)
first=i[1:]
emails.append(first+'@'+lst[-1])
print(','.join(emails))
```
No
| 24,149
|
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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.
Email address in Berland is a string of the form A@B, where A and B are arbitrary strings consisting of small Latin letters.
Bob is a system administrator in «Bersoft» company. He keeps a list of email addresses of the company's staff. This list is as a large string, where all addresses are written in arbitrary order, separated by commas. The same address can be written more than once.
Suddenly, because of unknown reasons, all commas in Bob's list disappeared. Now Bob has a string, where all addresses are written one after another without any separators, and there is impossible to determine, where the boundaries between addresses are. Unfortunately, on the same day his chief asked him to bring the initial list of addresses. Now Bob wants to disjoin addresses in some valid way. Help him to do that.
Input
The first line contains the list of addresses without separators. The length of this string is between 1 and 200, inclusive. The string consists only from small Latin letters and characters «@».
Output
If there is no list of the valid (according to the Berland rules) email addresses such that after removing all commas it coincides with the given string, output No solution. In the other case, output the list. The same address can be written in this list more than once. If there are several solutions, output any of them.
Examples
Input
a@aa@a
Output
a@a,a@a
Input
a@a@a
Output
No solution
Input
@aa@a
Output
No solution
Submitted Solution:
```
def main():
string = input()
comps = string.split('@')
ans = []
for i in range(len(comps)):
if i == 0 or i == len(comps) - 1:
if len(comps[i]) < 1:
print("No solution")
return
else:
if len(comps[i]) < 2:
print("No solution")
return
for i in range(len(comps) - 1):
if i == 0:
ans.append(comps[i] + '@' + comps[i + 1][:1])
elif i == len(comps) - 2:
ans.append(comps[i][1:] + '@' + comps[i + 1])
else:
ans.append(comps[i][1:] + '@' + comps[i + 1][:1])
print(', '.join(ans))
main()
```
No
| 24,150
|
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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.
Email address in Berland is a string of the form A@B, where A and B are arbitrary strings consisting of small Latin letters.
Bob is a system administrator in «Bersoft» company. He keeps a list of email addresses of the company's staff. This list is as a large string, where all addresses are written in arbitrary order, separated by commas. The same address can be written more than once.
Suddenly, because of unknown reasons, all commas in Bob's list disappeared. Now Bob has a string, where all addresses are written one after another without any separators, and there is impossible to determine, where the boundaries between addresses are. Unfortunately, on the same day his chief asked him to bring the initial list of addresses. Now Bob wants to disjoin addresses in some valid way. Help him to do that.
Input
The first line contains the list of addresses without separators. The length of this string is between 1 and 200, inclusive. The string consists only from small Latin letters and characters «@».
Output
If there is no list of the valid (according to the Berland rules) email addresses such that after removing all commas it coincides with the given string, output No solution. In the other case, output the list. The same address can be written in this list more than once. If there are several solutions, output any of them.
Examples
Input
a@aa@a
Output
a@a,a@a
Input
a@a@a
Output
No solution
Input
@aa@a
Output
No solution
Submitted Solution:
```
s=input()
if s[0]!="@" and s[len(s)-1]!="@":
exit=s[::-1]
exit=len(exit)-exit.index("@")-1
mas=[]
res=""
t=True
for i in range(len(s)):
res=res+s[i]
if (s[i]=="@"):
if i!=exit:
t=False
if (s[i+1]=="@"):
break
continue
else:
t=True
if t==False:
t=True
mas.append(res)
res=""
if i+1==len(s):
mas.append(res)
if t==True:
print(",".join(mas))
else:
print("No solution")
else:
print("No solution")
```
No
| 24,151
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Haiku is a genre of Japanese traditional poetry.
A haiku poem consists of 17 syllables split into three phrases, containing 5, 7 and 5 syllables correspondingly (the first phrase should contain exactly 5 syllables, the second phrase should contain exactly 7 syllables, and the third phrase should contain exactly 5 syllables). A haiku masterpiece contains a description of a moment in those three phrases. Every word is important in a small poem, which is why haiku are rich with symbols. Each word has a special meaning, a special role. The main principle of haiku is to say much using a few words.
To simplify the matter, in the given problem we will consider that the number of syllable in the phrase is equal to the number of vowel letters there. Only the following letters are regarded as vowel letters: "a", "e", "i", "o" and "u".
Three phases from a certain poem are given. Determine whether it is haiku or not.
Input
The input data consists of three lines. The length of each line is between 1 and 100, inclusive. The i-th line contains the i-th phrase of the poem. Each phrase consists of one or more words, which are separated by one or more spaces. A word is a non-empty sequence of lowercase Latin letters. Leading and/or trailing spaces in phrases are allowed. Every phrase has at least one non-space character. See the example for clarification.
Output
Print "YES" (without the quotes) if the poem is a haiku. Otherwise, print "NO" (also without the quotes).
Examples
Input
on codeforces
beta round is running
a rustling of keys
Output
YES
Input
how many gallons
of edo s rain did you drink
cuckoo
Output
NO
Tags: implementation, strings
Correct Solution:
```
print('YES' if [sum(s.count(x) for x in "aeiou") for s in [input() for _ in range(3)]]==[5,7,5] else 'NO')
```
| 24,380
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Haiku is a genre of Japanese traditional poetry.
A haiku poem consists of 17 syllables split into three phrases, containing 5, 7 and 5 syllables correspondingly (the first phrase should contain exactly 5 syllables, the second phrase should contain exactly 7 syllables, and the third phrase should contain exactly 5 syllables). A haiku masterpiece contains a description of a moment in those three phrases. Every word is important in a small poem, which is why haiku are rich with symbols. Each word has a special meaning, a special role. The main principle of haiku is to say much using a few words.
To simplify the matter, in the given problem we will consider that the number of syllable in the phrase is equal to the number of vowel letters there. Only the following letters are regarded as vowel letters: "a", "e", "i", "o" and "u".
Three phases from a certain poem are given. Determine whether it is haiku or not.
Input
The input data consists of three lines. The length of each line is between 1 and 100, inclusive. The i-th line contains the i-th phrase of the poem. Each phrase consists of one or more words, which are separated by one or more spaces. A word is a non-empty sequence of lowercase Latin letters. Leading and/or trailing spaces in phrases are allowed. Every phrase has at least one non-space character. See the example for clarification.
Output
Print "YES" (without the quotes) if the poem is a haiku. Otherwise, print "NO" (also without the quotes).
Examples
Input
on codeforces
beta round is running
a rustling of keys
Output
YES
Input
how many gallons
of edo s rain did you drink
cuckoo
Output
NO
Tags: implementation, strings
Correct Solution:
```
import sys
import os
from collections import Counter
def changeStdioToFile():
path = os.path.dirname(os.path.abspath(__file__))
sys.stdin = open(f'{path}/input.txt', 'r')
sys.stdout = open(f'{path}/output.txt', 'w')
#changeStdioToFile()
t = 1
# t = int(input())
for _ in range(t):
flag = False
for i in (5, 7, 5):
c = Counter(input())
if sum(c.get(w, 0) for w in 'aeiou') != i:
flag = True
print("YES" if not flag else "NO")
```
| 24,381
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Haiku is a genre of Japanese traditional poetry.
A haiku poem consists of 17 syllables split into three phrases, containing 5, 7 and 5 syllables correspondingly (the first phrase should contain exactly 5 syllables, the second phrase should contain exactly 7 syllables, and the third phrase should contain exactly 5 syllables). A haiku masterpiece contains a description of a moment in those three phrases. Every word is important in a small poem, which is why haiku are rich with symbols. Each word has a special meaning, a special role. The main principle of haiku is to say much using a few words.
To simplify the matter, in the given problem we will consider that the number of syllable in the phrase is equal to the number of vowel letters there. Only the following letters are regarded as vowel letters: "a", "e", "i", "o" and "u".
Three phases from a certain poem are given. Determine whether it is haiku or not.
Input
The input data consists of three lines. The length of each line is between 1 and 100, inclusive. The i-th line contains the i-th phrase of the poem. Each phrase consists of one or more words, which are separated by one or more spaces. A word is a non-empty sequence of lowercase Latin letters. Leading and/or trailing spaces in phrases are allowed. Every phrase has at least one non-space character. See the example for clarification.
Output
Print "YES" (without the quotes) if the poem is a haiku. Otherwise, print "NO" (also without the quotes).
Examples
Input
on codeforces
beta round is running
a rustling of keys
Output
YES
Input
how many gallons
of edo s rain did you drink
cuckoo
Output
NO
Tags: implementation, strings
Correct Solution:
```
s1=input()
s2=input()
s3=input()
c1=s1.count('a')+s1.count('e')+s1.count('i')+s1.count('o')+s1.count('u')
c2=s2.count('a')+s2.count('e')+s2.count('i')+s2.count('o')+s2.count('u')
c3=s3.count('a')+s3.count('e')+s3.count('i')+s3.count('o')+s3.count('u')
if(c1==5 and c2==7 and c3==5):
print("YES")
else:
print("NO")
```
| 24,382
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Haiku is a genre of Japanese traditional poetry.
A haiku poem consists of 17 syllables split into three phrases, containing 5, 7 and 5 syllables correspondingly (the first phrase should contain exactly 5 syllables, the second phrase should contain exactly 7 syllables, and the third phrase should contain exactly 5 syllables). A haiku masterpiece contains a description of a moment in those three phrases. Every word is important in a small poem, which is why haiku are rich with symbols. Each word has a special meaning, a special role. The main principle of haiku is to say much using a few words.
To simplify the matter, in the given problem we will consider that the number of syllable in the phrase is equal to the number of vowel letters there. Only the following letters are regarded as vowel letters: "a", "e", "i", "o" and "u".
Three phases from a certain poem are given. Determine whether it is haiku or not.
Input
The input data consists of three lines. The length of each line is between 1 and 100, inclusive. The i-th line contains the i-th phrase of the poem. Each phrase consists of one or more words, which are separated by one or more spaces. A word is a non-empty sequence of lowercase Latin letters. Leading and/or trailing spaces in phrases are allowed. Every phrase has at least one non-space character. See the example for clarification.
Output
Print "YES" (without the quotes) if the poem is a haiku. Otherwise, print "NO" (also without the quotes).
Examples
Input
on codeforces
beta round is running
a rustling of keys
Output
YES
Input
how many gallons
of edo s rain did you drink
cuckoo
Output
NO
Tags: implementation, strings
Correct Solution:
```
a=input().replace(' ','')
b=input().replace(' ','')
c=input().replace(' ','')
l=list('aeiou')
f,d,e=0,0,0
for i in a:
if i in l:
f+=1
for i in b:
if i in l:
d+=1
for i in c:
if i in l:
e+=1
if(f==5 and d==7 and e==5):
print("YES")
else:
print("NO")
```
| 24,383
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Haiku is a genre of Japanese traditional poetry.
A haiku poem consists of 17 syllables split into three phrases, containing 5, 7 and 5 syllables correspondingly (the first phrase should contain exactly 5 syllables, the second phrase should contain exactly 7 syllables, and the third phrase should contain exactly 5 syllables). A haiku masterpiece contains a description of a moment in those three phrases. Every word is important in a small poem, which is why haiku are rich with symbols. Each word has a special meaning, a special role. The main principle of haiku is to say much using a few words.
To simplify the matter, in the given problem we will consider that the number of syllable in the phrase is equal to the number of vowel letters there. Only the following letters are regarded as vowel letters: "a", "e", "i", "o" and "u".
Three phases from a certain poem are given. Determine whether it is haiku or not.
Input
The input data consists of three lines. The length of each line is between 1 and 100, inclusive. The i-th line contains the i-th phrase of the poem. Each phrase consists of one or more words, which are separated by one or more spaces. A word is a non-empty sequence of lowercase Latin letters. Leading and/or trailing spaces in phrases are allowed. Every phrase has at least one non-space character. See the example for clarification.
Output
Print "YES" (without the quotes) if the poem is a haiku. Otherwise, print "NO" (also without the quotes).
Examples
Input
on codeforces
beta round is running
a rustling of keys
Output
YES
Input
how many gallons
of edo s rain did you drink
cuckoo
Output
NO
Tags: implementation, strings
Correct Solution:
```
# import sys
# sys.stdin=open('input.in','r')
# sys.stdout=open('output.out','w')
l=['a','e','i','o','u']
t1=t2=t3=0
s1=input().strip()
s2=input().strip()
s3=input().strip()
for x in s1:
if x in l:
t1+=1
for x in s2:
if x in l:
t2+=1
for x in s3:
if x in l:
t3+=1
if t1==5 and t2==7 and t3==5:
print('YES')
else:
print('NO')
```
| 24,384
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|
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