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Provide tags and a correct Python 3 solution for this coding contest problem.
Eudokimus, a system administrator is in trouble again. As a result of an error in some script, a list of names of very important files has been damaged. Since they were files in the BerFS file system, it is known that each file name has a form "name.ext", where:
* name is a string consisting of lowercase Latin letters, its length is from 1 to 8 characters;
* ext is a string consisting of lowercase Latin letters, its length is from 1 to 3 characters.
For example, "read.me", "example.txt" and "b.cpp" are valid file names and "version.info", "ntldr" and "contestdata.zip" are not.
Damage to the list meant that all the file names were recorded one after another, without any separators. So now Eudokimus has a single string.
Eudokimus needs to set everything right as soon as possible. He should divide the resulting string into parts so that each part would be a valid file name in BerFS. Since Eudokimus has already proved that he is not good at programming, help him. The resulting file list can contain the same file names.
Input
The input data consists of a single string s, its length is from 1 to 4·105 characters. The string can contain only lowercase Latin letters ('a' - 'z') and periods ('.').
Output
In the first line print "YES" (without the quotes), if it is possible to divide s into parts as required. In this case, the following lines should contain the parts of the required partition, one per line in the order in which they appear in s. The required partition can contain the same file names. If there are multiple solutions, print any of them.
If the solution does not exist, then print in a single line "NO" (without the quotes).
Examples
Input
read.meexample.txtb.cpp
Output
YES
read.m
eexample.t
xtb.cpp
Input
version.infontldrcontestdata.zip
Output
NO
Tags: dp, greedy, implementation
Correct Solution:
```
#############<------------ Xorcestor_X ---------------->############
from math import *
def is_even(p):
n=len(p)
count=0
for i in range(n):
index=p.index(i,i,n)
if i==index:
pass
else:
count+=1
temp=p[i]
p[i]=p[index]
p[index]=temp
# print(p)
if count%2==0:
return True
else:
return False
prime=[]
def SieveOfEratosthenes():
global prime
prime=[1]*2000010
prime[1]=0
p=2
while p*p<=2000001:
if prime[p]:
for i in range(p*p,2000002,p):
prime[i]=0
lpf=[]
def precompute():
global lpf
lpf=[0]*1000001
for i in range(2,1000001):
if not lpf[i]:
for j in range(i,1000001,i):
if not lpf[j]:
lpf[j]=i
def binpow(a,b):
res=1
while b>0:
if b&1:
res*=a
a*=a
b>>=1
return res
def modpow(a,b,x):
res=1
while b>0:
if b&1:
res*=a
res%=x
a*=a
a%=x
b>>=1
return res
cont=[]
def f(x):
global cont
total=0
for i in cont:
total+=abs(i-x)
return total
def bs(low,high,target):
while low+3<high:
mid=(low+high)/2
if arr[mid]<target:
low=mid
else:
high=mid-1
for i in range(high,low-1,-1):
if arr[o]<target:
return i
return -1
def ternary_search(l,r):
while r-l>10:
m1=l+(r-l)/3
m2=r-(r-l)/3
f1=f(m1)
f2=f(m2)
if f1>f2:
l=m1
else:
r=m2
mino=f(l)
for i in range(l,r+1):
mino=min(mino,f(i))
return mino
s=input()
l=s.split('.')
n=len(l)
if n==0 or n==1:
print('NO')
quit()
glob=[]
b=True
if len(l[0])>8 or len(l[0])==0:
b=False
if len(l[-1])>3 or len(l[-1])==0:
b=False
if n==1:
if b:
print("YES")
print(s)
quit()
else:
print("NO")
quit()
glob.append(l[0]+'.')
for i in range(1,n-1):
if 2<=len(l[i])<=11:
if len(l[i])<=9:
glob[i-1]+=l[i][0:1]
glob.append(l[i][1:]+'.')
else:
glob[i-1]+=l[i][0:-8]
glob.append(l[i][-8:]+'.')
else:
b=False
break
glob[-1]+=l[-1]
if b:
print('YES')
for a in glob:
print(a)
else:
print('NO')
```
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Eudokimus, a system administrator is in trouble again. As a result of an error in some script, a list of names of very important files has been damaged. Since they were files in the BerFS file system, it is known that each file name has a form "name.ext", where:
* name is a string consisting of lowercase Latin letters, its length is from 1 to 8 characters;
* ext is a string consisting of lowercase Latin letters, its length is from 1 to 3 characters.
For example, "read.me", "example.txt" and "b.cpp" are valid file names and "version.info", "ntldr" and "contestdata.zip" are not.
Damage to the list meant that all the file names were recorded one after another, without any separators. So now Eudokimus has a single string.
Eudokimus needs to set everything right as soon as possible. He should divide the resulting string into parts so that each part would be a valid file name in BerFS. Since Eudokimus has already proved that he is not good at programming, help him. The resulting file list can contain the same file names.
Input
The input data consists of a single string s, its length is from 1 to 4·105 characters. The string can contain only lowercase Latin letters ('a' - 'z') and periods ('.').
Output
In the first line print "YES" (without the quotes), if it is possible to divide s into parts as required. In this case, the following lines should contain the parts of the required partition, one per line in the order in which they appear in s. The required partition can contain the same file names. If there are multiple solutions, print any of them.
If the solution does not exist, then print in a single line "NO" (without the quotes).
Examples
Input
read.meexample.txtb.cpp
Output
YES
read.m
eexample.t
xtb.cpp
Input
version.infontldrcontestdata.zip
Output
NO
Tags: dp, greedy, implementation
Correct Solution:
```
# ========= /\ /| |====/|
# | / \ | | / |
# | /____\ | | / |
# | / \ | | / |
# ========= / \ ===== |/====|
# code
def main():
s = input()
a = list(s.split('.'))
# print(a)
if len(a) == 1:
print('NO')
return
if '' in a:
print('NO')
return
if len(a[0]) > 8:
print('NO')
return
if len(a[-1]) > 3:
print('NO')
return
for i in range(1 , len(a)-1):
if len(a[i]) > 11 or len(a[i]) <= 1:
print('NO')
return
print('YES')
print(a[0],end='.')
for i in range(1,len(a)-1):
if len(a[i]) > 3:
print(a[i][:3])
print(a[i][3:] , end='.')
else:
print(a[i][0])
print(a[i][1:] , end = '.')
print(a[-1])
return
if __name__ == "__main__":
main()
```
| 96,379
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Input
The input contains a single integer a (1 ≤ a ≤ 40).
Output
Output a single string.
Examples
Input
2
Output
Adams
Input
8
Output
Van Buren
Input
29
Output
Harding
Tags: *special, implementation
Correct Solution:
```
pres = ["Washington",
"Adams",
"Jefferson",
"Madison",
"Monroe",
"Adams",
"Jackson",
"Van Buren",
"Harrison",
"Tyler",
"Polk",
"Taylor",
"Fillmore",
"Pierce",
"Buchanan",
"Lincoln",
"Johnson",
"Grant",
"Hayes",
"Garfield",
"Arthur",
"Cleveland",
"Harrison",
"Cleveland",
"McKinley",
"Roosevelt",
"Taft",
"Wilson",
"Harding",
"Coolidge",
"Hoover",
"Roosevelt",
"Truman",
"Eisenhower",
"Kennedy",
"Johnson",
"Nixon",
"Ford",
"Carter",
"Reagan",
"Bush",
"Clinton",
"Bush",
"Obama",
"Trump",
"Biden"]
print(pres[int(input())-1])
```
| 96,440
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Input
The input contains a single integer a (1 ≤ a ≤ 40).
Output
Output a single string.
Examples
Input
2
Output
Adams
Input
8
Output
Van Buren
Input
29
Output
Harding
Tags: *special, implementation
Correct Solution:
```
n=int(input())
if (n == 1) :
print ("Washington")
elif (n == 2):
print ("Adams")
elif (n == 3):
print ("Jefferson")
elif (n == 4):
print ("Madison")
elif (n == 5):
print ("Monroe")
elif (n == 6):
print ("Adams")
elif (n == 7):
print ("Jackson")
elif (n == 8):
print ("Van Buren")
elif (n == 9):
print("Harrison")
elif (n == 10):
print("Tyler")
elif (n == 11):
print("Polk")
elif (n == 12):
print("Taylor")
elif (n == 13):
print("Fillmore")
elif (n == 14):
print("Pierce")
elif (n == 15):
print("Buchanan")
elif (n == 16):
print ("Lincoln")
elif (n == 17):
print ("Johnson")
elif (n == 18):
print ("Grant")
elif (n == 19):
print ("Hayes")
elif (n == 20):
print ("Garfield")
elif (n == 21):
print ("Arthur")
elif (n == 22):
print ("Cleveland")
elif (n == 23):
print ("Harrison")
elif (n == 24):
print ("Cleveland")
elif (n == 25):
print ("McKinley")
elif (n == 26):
print ("Roosevelt")
elif (n == 27):
print ("Taft")
elif (n == 28):
print ("Wilson")
elif (n == 29):
print ('Harding')
elif (n == 30):
print ("Coolidge")
elif (n == 31):
print ("Hoover")
elif (n == 32):
print ("Roosevelt")
elif (n == 33):
print ("Truman")
elif (n == 34):
print ("Eisenhower")
elif (n == 35):
print ("Kennedy")
elif (n == 36):
print ("Johnson")
elif (n == 37):
print ("Nixon")
elif n == 38:
print ("Ford")
elif n == 39:
print ("Carter")
elif n == 40:
print ("Reagan")
```
| 96,441
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Input
The input contains a single integer a (1 ≤ a ≤ 40).
Output
Output a single string.
Examples
Input
2
Output
Adams
Input
8
Output
Van Buren
Input
29
Output
Harding
Tags: *special, implementation
Correct Solution:
```
a = ['Washington', 'Adams', 'Jefferson', 'Madison', 'Monroe', 'Adams', 'Jackson', 'Van Buren', 'Harrison', 'Tyler', 'Polk', 'Taylor', 'Fillmore', 'Pierce', 'Buchanan', 'Lincoln', 'Johnson', 'Grant', 'Hayes', 'Garfield', 'Arthur', 'Cleveland', 'Harrison', 'Cleveland', 'McKinley', 'Roosevelt', 'Taft', 'Wilson', 'Harding', 'Coolidge', 'Hoover', 'Roosevelt', 'Truman', 'Eisenhower', 'Kennedy', 'Johnson', 'Nixon', 'Ford', 'Carter', 'Reagan', 'Bush', '']
print(a[int(input()) - 1])
```
| 96,442
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Special Agent Smart Beaver works in a secret research department of ABBYY. He's been working there for a long time and is satisfied with his job, as it allows him to eat out in the best restaurants and order the most expensive and exotic wood types there.
The content special agent has got an important task: to get the latest research by British scientists on the English Language. These developments are encoded and stored in a large safe. The Beaver's teeth are strong enough, so the authorities assured that upon arriving at the place the beaver won't have any problems with opening the safe.
And he finishes his aspen sprig and leaves for this important task. Of course, the Beaver arrived at the location without any problems, but alas. He can't open the safe with his strong and big teeth. At this point, the Smart Beaver get a call from the headquarters and learns that opening the safe with the teeth is not necessary, as a reliable source has sent the following information: the safe code consists of digits and has no leading zeroes. There also is a special hint, which can be used to open the safe. The hint is string s with the following structure:
* if si = "?", then the digit that goes i-th in the safe code can be anything (between 0 to 9, inclusively);
* if si is a digit (between 0 to 9, inclusively), then it means that there is digit si on position i in code;
* if the string contains letters from "A" to "J", then all positions with the same letters must contain the same digits and the positions with distinct letters must contain distinct digits.
* The length of the safe code coincides with the length of the hint.
For example, hint "?JGJ9" has such matching safe code variants: "51919", "55959", "12329", "93539" and so on, and has wrong variants such as: "56669", "00111", "03539" and "13666".
After receiving such information, the authorities change the plan and ask the special agents to work quietly and gently and not to try to open the safe by mechanical means, and try to find the password using the given hint.
At a special agent school the Smart Beaver was the fastest in his platoon finding codes for such safes, but now he is not in that shape: the years take their toll ... Help him to determine the number of possible variants of the code to the safe, matching the given hint. After receiving this information, and knowing his own speed of entering codes, the Smart Beaver will be able to determine whether he will have time for tonight's show "Beavers are on the trail" on his favorite TV channel, or he should work for a sleepless night...
Input
The first line contains string s — the hint to the safe code. String s consists of the following characters: ?, 0-9, A-J. It is guaranteed that the first character of string s doesn't equal to character 0.
The input limits for scoring 30 points are (subproblem A1):
* 1 ≤ |s| ≤ 5.
The input limits for scoring 100 points are (subproblems A1+A2):
* 1 ≤ |s| ≤ 105.
Here |s| means the length of string s.
Output
Print the number of codes that match the given hint.
Examples
Input
AJ
Output
81
Input
1?AA
Output
100
Tags: greedy
Correct Solution:
```
s = input()
z = set()
us = 0
ans = 1
if s[0] == '?' or (s[0] >= 'A' and s[0] <= 'J'):
ans = 9
z.add(s[0])
if s[0] >= 'A' and s[0] <= 'J':
us += 1
i = -1
for x in s:
i += 1
if i == 0:
continue
if x == '?':
ans *= 10
if x >= 'A' and x <= 'J':
if x not in z:
ans *= (10 - us)
z.add(x)
us += 1
print(ans)
```
| 96,454
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Special Agent Smart Beaver works in a secret research department of ABBYY. He's been working there for a long time and is satisfied with his job, as it allows him to eat out in the best restaurants and order the most expensive and exotic wood types there.
The content special agent has got an important task: to get the latest research by British scientists on the English Language. These developments are encoded and stored in a large safe. The Beaver's teeth are strong enough, so the authorities assured that upon arriving at the place the beaver won't have any problems with opening the safe.
And he finishes his aspen sprig and leaves for this important task. Of course, the Beaver arrived at the location without any problems, but alas. He can't open the safe with his strong and big teeth. At this point, the Smart Beaver get a call from the headquarters and learns that opening the safe with the teeth is not necessary, as a reliable source has sent the following information: the safe code consists of digits and has no leading zeroes. There also is a special hint, which can be used to open the safe. The hint is string s with the following structure:
* if si = "?", then the digit that goes i-th in the safe code can be anything (between 0 to 9, inclusively);
* if si is a digit (between 0 to 9, inclusively), then it means that there is digit si on position i in code;
* if the string contains letters from "A" to "J", then all positions with the same letters must contain the same digits and the positions with distinct letters must contain distinct digits.
* The length of the safe code coincides with the length of the hint.
For example, hint "?JGJ9" has such matching safe code variants: "51919", "55959", "12329", "93539" and so on, and has wrong variants such as: "56669", "00111", "03539" and "13666".
After receiving such information, the authorities change the plan and ask the special agents to work quietly and gently and not to try to open the safe by mechanical means, and try to find the password using the given hint.
At a special agent school the Smart Beaver was the fastest in his platoon finding codes for such safes, but now he is not in that shape: the years take their toll ... Help him to determine the number of possible variants of the code to the safe, matching the given hint. After receiving this information, and knowing his own speed of entering codes, the Smart Beaver will be able to determine whether he will have time for tonight's show "Beavers are on the trail" on his favorite TV channel, or he should work for a sleepless night...
Input
The first line contains string s — the hint to the safe code. String s consists of the following characters: ?, 0-9, A-J. It is guaranteed that the first character of string s doesn't equal to character 0.
The input limits for scoring 30 points are (subproblem A1):
* 1 ≤ |s| ≤ 5.
The input limits for scoring 100 points are (subproblems A1+A2):
* 1 ≤ |s| ≤ 105.
Here |s| means the length of string s.
Output
Print the number of codes that match the given hint.
Examples
Input
AJ
Output
81
Input
1?AA
Output
100
Tags: greedy
Correct Solution:
```
s = input()
ans = 1
l = list('ABCDEFGHIJ')
if s[0] == "?":
ans *= 9
elif s[0] in l:
ans *= 9
l.remove(s[0])
for i in s[1:]:
if i == "?":
ans *= 10
elif i in l:
ans *= len(l)
l.remove(i)
print(ans)
```
| 96,455
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Special Agent Smart Beaver works in a secret research department of ABBYY. He's been working there for a long time and is satisfied with his job, as it allows him to eat out in the best restaurants and order the most expensive and exotic wood types there.
The content special agent has got an important task: to get the latest research by British scientists on the English Language. These developments are encoded and stored in a large safe. The Beaver's teeth are strong enough, so the authorities assured that upon arriving at the place the beaver won't have any problems with opening the safe.
And he finishes his aspen sprig and leaves for this important task. Of course, the Beaver arrived at the location without any problems, but alas. He can't open the safe with his strong and big teeth. At this point, the Smart Beaver get a call from the headquarters and learns that opening the safe with the teeth is not necessary, as a reliable source has sent the following information: the safe code consists of digits and has no leading zeroes. There also is a special hint, which can be used to open the safe. The hint is string s with the following structure:
* if si = "?", then the digit that goes i-th in the safe code can be anything (between 0 to 9, inclusively);
* if si is a digit (between 0 to 9, inclusively), then it means that there is digit si on position i in code;
* if the string contains letters from "A" to "J", then all positions with the same letters must contain the same digits and the positions with distinct letters must contain distinct digits.
* The length of the safe code coincides with the length of the hint.
For example, hint "?JGJ9" has such matching safe code variants: "51919", "55959", "12329", "93539" and so on, and has wrong variants such as: "56669", "00111", "03539" and "13666".
After receiving such information, the authorities change the plan and ask the special agents to work quietly and gently and not to try to open the safe by mechanical means, and try to find the password using the given hint.
At a special agent school the Smart Beaver was the fastest in his platoon finding codes for such safes, but now he is not in that shape: the years take their toll ... Help him to determine the number of possible variants of the code to the safe, matching the given hint. After receiving this information, and knowing his own speed of entering codes, the Smart Beaver will be able to determine whether he will have time for tonight's show "Beavers are on the trail" on his favorite TV channel, or he should work for a sleepless night...
Input
The first line contains string s — the hint to the safe code. String s consists of the following characters: ?, 0-9, A-J. It is guaranteed that the first character of string s doesn't equal to character 0.
The input limits for scoring 30 points are (subproblem A1):
* 1 ≤ |s| ≤ 5.
The input limits for scoring 100 points are (subproblems A1+A2):
* 1 ≤ |s| ≤ 105.
Here |s| means the length of string s.
Output
Print the number of codes that match the given hint.
Examples
Input
AJ
Output
81
Input
1?AA
Output
100
Tags: greedy
Correct Solution:
```
s = str(input())
result = 1
n = len(s)
rozne = set()
pytajniki = 0
mnoznik_z_pierwszego = 1
for i in range(0,n):
if ord(s[i]) >= ord('0') and ord(s[i]) <= ord('9'):
continue;
elif ord(s[i]) >= ord('A') and ord(s[i]) <= ord('Z'):
rozne.add(ord(s[i]))
continue
else:
if i == 0:
mnoznik_z_pierwszego = 9
else:
pytajniki = pytajniki + 1
for i in range(0, len(rozne)):
result = result * (10 - i)
result = result * mnoznik_z_pierwszego
if ord(s[0]) >= ord('A') and ord(s[0]) <= ord('Z'):
result = result / 10 * 9
print(int(result), end="")
for i in range(pytajniki):
print("0", end="")
print()
```
| 96,456
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Special Agent Smart Beaver works in a secret research department of ABBYY. He's been working there for a long time and is satisfied with his job, as it allows him to eat out in the best restaurants and order the most expensive and exotic wood types there.
The content special agent has got an important task: to get the latest research by British scientists on the English Language. These developments are encoded and stored in a large safe. The Beaver's teeth are strong enough, so the authorities assured that upon arriving at the place the beaver won't have any problems with opening the safe.
And he finishes his aspen sprig and leaves for this important task. Of course, the Beaver arrived at the location without any problems, but alas. He can't open the safe with his strong and big teeth. At this point, the Smart Beaver get a call from the headquarters and learns that opening the safe with the teeth is not necessary, as a reliable source has sent the following information: the safe code consists of digits and has no leading zeroes. There also is a special hint, which can be used to open the safe. The hint is string s with the following structure:
* if si = "?", then the digit that goes i-th in the safe code can be anything (between 0 to 9, inclusively);
* if si is a digit (between 0 to 9, inclusively), then it means that there is digit si on position i in code;
* if the string contains letters from "A" to "J", then all positions with the same letters must contain the same digits and the positions with distinct letters must contain distinct digits.
* The length of the safe code coincides with the length of the hint.
For example, hint "?JGJ9" has such matching safe code variants: "51919", "55959", "12329", "93539" and so on, and has wrong variants such as: "56669", "00111", "03539" and "13666".
After receiving such information, the authorities change the plan and ask the special agents to work quietly and gently and not to try to open the safe by mechanical means, and try to find the password using the given hint.
At a special agent school the Smart Beaver was the fastest in his platoon finding codes for such safes, but now he is not in that shape: the years take their toll ... Help him to determine the number of possible variants of the code to the safe, matching the given hint. After receiving this information, and knowing his own speed of entering codes, the Smart Beaver will be able to determine whether he will have time for tonight's show "Beavers are on the trail" on his favorite TV channel, or he should work for a sleepless night...
Input
The first line contains string s — the hint to the safe code. String s consists of the following characters: ?, 0-9, A-J. It is guaranteed that the first character of string s doesn't equal to character 0.
The input limits for scoring 30 points are (subproblem A1):
* 1 ≤ |s| ≤ 5.
The input limits for scoring 100 points are (subproblems A1+A2):
* 1 ≤ |s| ≤ 105.
Here |s| means the length of string s.
Output
Print the number of codes that match the given hint.
Examples
Input
AJ
Output
81
Input
1?AA
Output
100
Tags: greedy
Correct Solution:
```
import math
'''
r,c,n,k = map(int,input().split())
matrix = [['*' for row in range(c)] for column in range(r)]
for i in range(n):
x,y = map(int,input().split())
matrix[x-1][y-1] = '#'
ans = 0
for row1 in range(r):
for row2 in range(r):
if matrix[row1:row2+1].count('#') >= k:
ans+=1
for column1 in range(c):
for column2 in range(column1,c):
count = 0
for row in range(r):
count+=matrix[r][column1:column2+1].count('#')
if count >=k:
ans+=1
print(ans)
'''
s = input()
ques = s[1:].count('?')
d = {'A':0,'B':0,'C':0,'D':0,'E':0,'F':0,'G':0,'H':0,'I':0,'J':0}
digit = set([str(i) for i in range(0,10)])
digit.add('?')
ans = 1
ans*=pow(10,ques)
count =0
for i in range(1,len(s)):
if s[i] not in digit and d[s[i]] == 0:
count+=1
d[s[i]] = 1
start = 10
if s[0] in d and d[s[0]] == 1:
count-=1
ans*=9
start = 9
if s[0] in d and d[s[0]] == 0:
ans*=9
start = 9
while count!=0:
ans*=start
start-=1
count-=1
if s[0] == '?':
ans*=9
print(ans)
```
| 96,457
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Special Agent Smart Beaver works in a secret research department of ABBYY. He's been working there for a long time and is satisfied with his job, as it allows him to eat out in the best restaurants and order the most expensive and exotic wood types there.
The content special agent has got an important task: to get the latest research by British scientists on the English Language. These developments are encoded and stored in a large safe. The Beaver's teeth are strong enough, so the authorities assured that upon arriving at the place the beaver won't have any problems with opening the safe.
And he finishes his aspen sprig and leaves for this important task. Of course, the Beaver arrived at the location without any problems, but alas. He can't open the safe with his strong and big teeth. At this point, the Smart Beaver get a call from the headquarters and learns that opening the safe with the teeth is not necessary, as a reliable source has sent the following information: the safe code consists of digits and has no leading zeroes. There also is a special hint, which can be used to open the safe. The hint is string s with the following structure:
* if si = "?", then the digit that goes i-th in the safe code can be anything (between 0 to 9, inclusively);
* if si is a digit (between 0 to 9, inclusively), then it means that there is digit si on position i in code;
* if the string contains letters from "A" to "J", then all positions with the same letters must contain the same digits and the positions with distinct letters must contain distinct digits.
* The length of the safe code coincides with the length of the hint.
For example, hint "?JGJ9" has such matching safe code variants: "51919", "55959", "12329", "93539" and so on, and has wrong variants such as: "56669", "00111", "03539" and "13666".
After receiving such information, the authorities change the plan and ask the special agents to work quietly and gently and not to try to open the safe by mechanical means, and try to find the password using the given hint.
At a special agent school the Smart Beaver was the fastest in his platoon finding codes for such safes, but now he is not in that shape: the years take their toll ... Help him to determine the number of possible variants of the code to the safe, matching the given hint. After receiving this information, and knowing his own speed of entering codes, the Smart Beaver will be able to determine whether he will have time for tonight's show "Beavers are on the trail" on his favorite TV channel, or he should work for a sleepless night...
Input
The first line contains string s — the hint to the safe code. String s consists of the following characters: ?, 0-9, A-J. It is guaranteed that the first character of string s doesn't equal to character 0.
The input limits for scoring 30 points are (subproblem A1):
* 1 ≤ |s| ≤ 5.
The input limits for scoring 100 points are (subproblems A1+A2):
* 1 ≤ |s| ≤ 105.
Here |s| means the length of string s.
Output
Print the number of codes that match the given hint.
Examples
Input
AJ
Output
81
Input
1?AA
Output
100
Tags: greedy
Correct Solution:
```
from sys import *
from math import *
s = stdin.readline().strip()
ans = 1
now = 10
was = {}
was['A'] = False
was['B'] = False
was['C'] = False
was['D'] = False
was['E'] = False
was['F'] = False
was['G'] = False
was['H'] = False
was['I'] = False
was['J'] = False
if s[0] == '?':
ans *= 9
if (ord(s[0]) >= ord('A')) and (ord(s[0]) <= ord('J')):
ans *= 9
was[s[0]] = True
now = 9
cnt = 0
for i in range(1, len(s)):
if s[i] == '?':
cnt += 1
if (ord(s[i]) >= ord('A')) and (ord(s[i]) <= ord('J')):
if was[s[i]] == False:
ans *= now
now -= 1
was[s[i]] = True
print(ans, end = "")
for i in range(cnt):
print('0', end = "")
print()
```
| 96,458
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Special Agent Smart Beaver works in a secret research department of ABBYY. He's been working there for a long time and is satisfied with his job, as it allows him to eat out in the best restaurants and order the most expensive and exotic wood types there.
The content special agent has got an important task: to get the latest research by British scientists on the English Language. These developments are encoded and stored in a large safe. The Beaver's teeth are strong enough, so the authorities assured that upon arriving at the place the beaver won't have any problems with opening the safe.
And he finishes his aspen sprig and leaves for this important task. Of course, the Beaver arrived at the location without any problems, but alas. He can't open the safe with his strong and big teeth. At this point, the Smart Beaver get a call from the headquarters and learns that opening the safe with the teeth is not necessary, as a reliable source has sent the following information: the safe code consists of digits and has no leading zeroes. There also is a special hint, which can be used to open the safe. The hint is string s with the following structure:
* if si = "?", then the digit that goes i-th in the safe code can be anything (between 0 to 9, inclusively);
* if si is a digit (between 0 to 9, inclusively), then it means that there is digit si on position i in code;
* if the string contains letters from "A" to "J", then all positions with the same letters must contain the same digits and the positions with distinct letters must contain distinct digits.
* The length of the safe code coincides with the length of the hint.
For example, hint "?JGJ9" has such matching safe code variants: "51919", "55959", "12329", "93539" and so on, and has wrong variants such as: "56669", "00111", "03539" and "13666".
After receiving such information, the authorities change the plan and ask the special agents to work quietly and gently and not to try to open the safe by mechanical means, and try to find the password using the given hint.
At a special agent school the Smart Beaver was the fastest in his platoon finding codes for such safes, but now he is not in that shape: the years take their toll ... Help him to determine the number of possible variants of the code to the safe, matching the given hint. After receiving this information, and knowing his own speed of entering codes, the Smart Beaver will be able to determine whether he will have time for tonight's show "Beavers are on the trail" on his favorite TV channel, or he should work for a sleepless night...
Input
The first line contains string s — the hint to the safe code. String s consists of the following characters: ?, 0-9, A-J. It is guaranteed that the first character of string s doesn't equal to character 0.
The input limits for scoring 30 points are (subproblem A1):
* 1 ≤ |s| ≤ 5.
The input limits for scoring 100 points are (subproblems A1+A2):
* 1 ≤ |s| ≤ 105.
Here |s| means the length of string s.
Output
Print the number of codes that match the given hint.
Examples
Input
AJ
Output
81
Input
1?AA
Output
100
Tags: greedy
Correct Solution:
```
import math
import string
s = input()
p = 0
for x in string.ascii_uppercase[:10]:
if x in s:
p += 1
ans = 0
r = s.count('?')
if s[0] == '?':
ans = 9 * pow(10, r - 1) * math.factorial(10) // math.factorial(10 - p)
elif s[0] in string.ascii_uppercase:
ans = 9 * pow(10, r) * math.factorial(9) // math.factorial(9 - p + 1)
else:
ans = pow(10, r) * math.factorial(10) // math.factorial(10 - p)
print(ans)
```
| 96,459
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Special Agent Smart Beaver works in a secret research department of ABBYY. He's been working there for a long time and is satisfied with his job, as it allows him to eat out in the best restaurants and order the most expensive and exotic wood types there.
The content special agent has got an important task: to get the latest research by British scientists on the English Language. These developments are encoded and stored in a large safe. The Beaver's teeth are strong enough, so the authorities assured that upon arriving at the place the beaver won't have any problems with opening the safe.
And he finishes his aspen sprig and leaves for this important task. Of course, the Beaver arrived at the location without any problems, but alas. He can't open the safe with his strong and big teeth. At this point, the Smart Beaver get a call from the headquarters and learns that opening the safe with the teeth is not necessary, as a reliable source has sent the following information: the safe code consists of digits and has no leading zeroes. There also is a special hint, which can be used to open the safe. The hint is string s with the following structure:
* if si = "?", then the digit that goes i-th in the safe code can be anything (between 0 to 9, inclusively);
* if si is a digit (between 0 to 9, inclusively), then it means that there is digit si on position i in code;
* if the string contains letters from "A" to "J", then all positions with the same letters must contain the same digits and the positions with distinct letters must contain distinct digits.
* The length of the safe code coincides with the length of the hint.
For example, hint "?JGJ9" has such matching safe code variants: "51919", "55959", "12329", "93539" and so on, and has wrong variants such as: "56669", "00111", "03539" and "13666".
After receiving such information, the authorities change the plan and ask the special agents to work quietly and gently and not to try to open the safe by mechanical means, and try to find the password using the given hint.
At a special agent school the Smart Beaver was the fastest in his platoon finding codes for such safes, but now he is not in that shape: the years take their toll ... Help him to determine the number of possible variants of the code to the safe, matching the given hint. After receiving this information, and knowing his own speed of entering codes, the Smart Beaver will be able to determine whether he will have time for tonight's show "Beavers are on the trail" on his favorite TV channel, or he should work for a sleepless night...
Input
The first line contains string s — the hint to the safe code. String s consists of the following characters: ?, 0-9, A-J. It is guaranteed that the first character of string s doesn't equal to character 0.
The input limits for scoring 30 points are (subproblem A1):
* 1 ≤ |s| ≤ 5.
The input limits for scoring 100 points are (subproblems A1+A2):
* 1 ≤ |s| ≤ 105.
Here |s| means the length of string s.
Output
Print the number of codes that match the given hint.
Examples
Input
AJ
Output
81
Input
1?AA
Output
100
Tags: greedy
Correct Solution:
```
s = input()
abc = [0] * 26
cnt1 = 0
cnt2 = 0
ans = 1
for i in range(len(s)):
if s[i] == '?':
if i == 0:
ans *= 9
else:
cnt2 += 1
elif (s[i] >= 'A') and (s[i] <= 'Z'):
if abc[(ord(s[i]) - ord('A'))] == 0:
if i == 0:
abc[(ord(s[i]) - ord('A'))] = 1
ans *= 9
cnt1 += 1
else:
abc[(ord(s[i]) - ord('A'))] = 1
ans *= (10 - cnt1)
cnt1 += 1
print(str(ans) + '0' * cnt2)
```
| 96,460
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Special Agent Smart Beaver works in a secret research department of ABBYY. He's been working there for a long time and is satisfied with his job, as it allows him to eat out in the best restaurants and order the most expensive and exotic wood types there.
The content special agent has got an important task: to get the latest research by British scientists on the English Language. These developments are encoded and stored in a large safe. The Beaver's teeth are strong enough, so the authorities assured that upon arriving at the place the beaver won't have any problems with opening the safe.
And he finishes his aspen sprig and leaves for this important task. Of course, the Beaver arrived at the location without any problems, but alas. He can't open the safe with his strong and big teeth. At this point, the Smart Beaver get a call from the headquarters and learns that opening the safe with the teeth is not necessary, as a reliable source has sent the following information: the safe code consists of digits and has no leading zeroes. There also is a special hint, which can be used to open the safe. The hint is string s with the following structure:
* if si = "?", then the digit that goes i-th in the safe code can be anything (between 0 to 9, inclusively);
* if si is a digit (between 0 to 9, inclusively), then it means that there is digit si on position i in code;
* if the string contains letters from "A" to "J", then all positions with the same letters must contain the same digits and the positions with distinct letters must contain distinct digits.
* The length of the safe code coincides with the length of the hint.
For example, hint "?JGJ9" has such matching safe code variants: "51919", "55959", "12329", "93539" and so on, and has wrong variants such as: "56669", "00111", "03539" and "13666".
After receiving such information, the authorities change the plan and ask the special agents to work quietly and gently and not to try to open the safe by mechanical means, and try to find the password using the given hint.
At a special agent school the Smart Beaver was the fastest in his platoon finding codes for such safes, but now he is not in that shape: the years take their toll ... Help him to determine the number of possible variants of the code to the safe, matching the given hint. After receiving this information, and knowing his own speed of entering codes, the Smart Beaver will be able to determine whether he will have time for tonight's show "Beavers are on the trail" on his favorite TV channel, or he should work for a sleepless night...
Input
The first line contains string s — the hint to the safe code. String s consists of the following characters: ?, 0-9, A-J. It is guaranteed that the first character of string s doesn't equal to character 0.
The input limits for scoring 30 points are (subproblem A1):
* 1 ≤ |s| ≤ 5.
The input limits for scoring 100 points are (subproblems A1+A2):
* 1 ≤ |s| ≤ 105.
Here |s| means the length of string s.
Output
Print the number of codes that match the given hint.
Examples
Input
AJ
Output
81
Input
1?AA
Output
100
Tags: greedy
Correct Solution:
```
I=input()
s=set()
r=I.count('?')
for x in I:
if ord(x)>64:s.add(x)
i=10
t=1
for _ in s:t*=i;i-=1
if r:t*=10;r-=1
if ord(I[0])>57:t=t//10*9
print(str(t)+'0'*r)
```
| 96,461
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Vasya has recently finished writing a book. Now he faces the problem of giving it the title. Vasya wants the title to be vague and mysterious for his book to be noticeable among others. That's why the title should be represented by a single word containing at least once each of the first k Latin letters and not containing any other ones. Also, the title should be a palindrome, that is it should be read similarly from the left to the right and from the right to the left.
Vasya has already composed the approximate variant of the title. You are given the title template s consisting of lowercase Latin letters and question marks. Your task is to replace all the question marks by lowercase Latin letters so that the resulting word satisfies the requirements, described above. Each question mark should be replaced by exactly one letter, it is not allowed to delete characters or add new ones to the template. If there are several suitable titles, choose the first in the alphabetical order, for Vasya's book to appear as early as possible in all the catalogues.
Input
The first line contains an integer k (1 ≤ k ≤ 26) which is the number of allowed alphabet letters. The second line contains s which is the given template. In s only the first k lowercase letters of Latin alphabet and question marks can be present, the length of s is from 1 to 100 characters inclusively.
Output
If there is no solution, print IMPOSSIBLE. Otherwise, a single line should contain the required title, satisfying the given template. The title should be a palindrome and it can only contain the first k letters of the Latin alphabet. At that, each of those k letters must be present at least once. If there are several suitable titles, print the lexicographically minimal one.
The lexicographical comparison is performed by the standard < operator in modern programming languages. The line a is lexicographically smaller than the line b, if exists such an i (1 ≤ i ≤ |s|), that ai < bi, and for any j (1 ≤ j < i) aj = bj. |s| stands for the length of the given template.
Examples
Input
3
a?c
Output
IMPOSSIBLE
Input
2
a??a
Output
abba
Input
2
?b?a
Output
abba
Tags: expression parsing
Correct Solution:
```
from sys import stdin
def main():
n = int(stdin.readline())
line = stdin.readline().strip()
i,j = 0,len(line)-1
ans = ["" for i in range(len(line))]
visited = [False for i in range(27)]
ok = True
for i in range(len(line)):
if(96< ord(line[i]) <123):
cont = ord(line[i])-97
visited[cont] = True
if cont > n:
ok = False
N = len(line)
if(N%2 != 0):
mid = N//2
i = mid-1
j = mid+1
if(line[mid] == "?"):
v = 0
while v < n:
if(not visited[n-v-1]):
ans[mid] = chr(n-v-1+97)
visited[n-v-1] = True
break
v+=1
if(ans[mid] == ""):
ans[mid] = "a"
else:
ans[mid]=line[mid]
else:
mid = N//2
i = mid-1
j = mid
while(j < len(line)):
#print(ans)
if(line[j] == "?" and line[i] != "?"):
ans[i] = line[i]
ans[j] = line[i]
visited[ord(line[i])-97] = True
elif(line[j] != "?" and line[i] == "?"):
ans[i] = line[j]
ans[j] = line[j]
visited[ord(line[j])-97] = True
elif(line[j] == "?" and line[i] == "?"):
v = 0
while v < n:
if(not visited[n-v-1]):
ans[i] = chr(n-v-1+97)
ans[j] = chr(n-v-1+97)
visited[n-v-1] = True
break
v+=1
if(ans[i] == ""):
ans[i] = "a"
ans[j] = "a"
elif(line[j] == line[i]):
ans[i]=line[j]
ans[j]=line[j]
visited[ord(line[j])-97] = True
else:
ok = False
j+=1
i-=1
w = 0
while w < n :
if(not visited[w]):
ok = False
w+=1
while w < len(visited) :
if(visited[w]):
ok = False
w+=1
#print(ans)
if(ok):
aux = ""
for k in range(len(ans)):
aux += ans[k]
print(aux)
else:
print("IMPOSSIBLE")
main()
```
| 96,567
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Vasya has recently finished writing a book. Now he faces the problem of giving it the title. Vasya wants the title to be vague and mysterious for his book to be noticeable among others. That's why the title should be represented by a single word containing at least once each of the first k Latin letters and not containing any other ones. Also, the title should be a palindrome, that is it should be read similarly from the left to the right and from the right to the left.
Vasya has already composed the approximate variant of the title. You are given the title template s consisting of lowercase Latin letters and question marks. Your task is to replace all the question marks by lowercase Latin letters so that the resulting word satisfies the requirements, described above. Each question mark should be replaced by exactly one letter, it is not allowed to delete characters or add new ones to the template. If there are several suitable titles, choose the first in the alphabetical order, for Vasya's book to appear as early as possible in all the catalogues.
Input
The first line contains an integer k (1 ≤ k ≤ 26) which is the number of allowed alphabet letters. The second line contains s which is the given template. In s only the first k lowercase letters of Latin alphabet and question marks can be present, the length of s is from 1 to 100 characters inclusively.
Output
If there is no solution, print IMPOSSIBLE. Otherwise, a single line should contain the required title, satisfying the given template. The title should be a palindrome and it can only contain the first k letters of the Latin alphabet. At that, each of those k letters must be present at least once. If there are several suitable titles, print the lexicographically minimal one.
The lexicographical comparison is performed by the standard < operator in modern programming languages. The line a is lexicographically smaller than the line b, if exists such an i (1 ≤ i ≤ |s|), that ai < bi, and for any j (1 ≤ j < i) aj = bj. |s| stands for the length of the given template.
Examples
Input
3
a?c
Output
IMPOSSIBLE
Input
2
a??a
Output
abba
Input
2
?b?a
Output
abba
Tags: expression parsing
Correct Solution:
```
import sys
from array import array # noqa: F401
def input():
return sys.stdin.buffer.readline().decode('utf-8')
k = int(input())
a = list(input().rstrip())
n = len(a)
unused = [1] * k
def ng():
print('IMPOSSIBLE')
exit()
try:
for i in range(n):
if a[i] == '?' and a[n - i - 1] != '?':
a[i] = a[n - i - 1]
if a[i] != '?':
unused[ord(a[i]) - 97] = 0
except IndexError:
ng()
for i in range(n):
if a[i] != a[n - i - 1]:
ng()
for i in range(n // 2, n):
if a[i] == '?':
for cc in range(k - 1, -1, -1):
if unused[cc]:
a[i] = a[n - i - 1] = chr(cc + 97)
unused[cc] = 0
break
else:
a[i] = a[n - i - 1] = 'a'
if any(unused):
ng()
print(*a, sep='')
```
| 96,568
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Vasya has recently finished writing a book. Now he faces the problem of giving it the title. Vasya wants the title to be vague and mysterious for his book to be noticeable among others. That's why the title should be represented by a single word containing at least once each of the first k Latin letters and not containing any other ones. Also, the title should be a palindrome, that is it should be read similarly from the left to the right and from the right to the left.
Vasya has already composed the approximate variant of the title. You are given the title template s consisting of lowercase Latin letters and question marks. Your task is to replace all the question marks by lowercase Latin letters so that the resulting word satisfies the requirements, described above. Each question mark should be replaced by exactly one letter, it is not allowed to delete characters or add new ones to the template. If there are several suitable titles, choose the first in the alphabetical order, for Vasya's book to appear as early as possible in all the catalogues.
Input
The first line contains an integer k (1 ≤ k ≤ 26) which is the number of allowed alphabet letters. The second line contains s which is the given template. In s only the first k lowercase letters of Latin alphabet and question marks can be present, the length of s is from 1 to 100 characters inclusively.
Output
If there is no solution, print IMPOSSIBLE. Otherwise, a single line should contain the required title, satisfying the given template. The title should be a palindrome and it can only contain the first k letters of the Latin alphabet. At that, each of those k letters must be present at least once. If there are several suitable titles, print the lexicographically minimal one.
The lexicographical comparison is performed by the standard < operator in modern programming languages. The line a is lexicographically smaller than the line b, if exists such an i (1 ≤ i ≤ |s|), that ai < bi, and for any j (1 ≤ j < i) aj = bj. |s| stands for the length of the given template.
Examples
Input
3
a?c
Output
IMPOSSIBLE
Input
2
a??a
Output
abba
Input
2
?b?a
Output
abba
Tags: expression parsing
Correct Solution:
```
a = [0]*26
k = int(input())
s = input()
sl = [i for i in s]
for i in s:
if(i!='?'):
a[ord(i)-97] = 1
for i in range(len(s)//2,len(s)):
if(s[i]=='?'):
if(s[len(s)-i-1] == '?'):
f = 0
for j in range(k-1,-1,-1):
if(a[j]!=1):
f = 1
sl.pop(i)
sl.insert(i,chr(j+97))
sl.pop(len(s)-i-1)
sl.insert(len(s)-i-1,chr(j+97))
a[j] = 1
break
if(not f):
sl.pop(i)
sl.insert(i,'a')
sl.pop(len(s)-i-1)
sl.insert(len(s)-i-1,'a')
else:
sl.pop(i)
sl.insert(i,s[len(s)-i-1])
else:
if(s[len(s)-i-1] == '?'):
sl.pop(len(s)-i-1)
sl.insert(len(s)-i-1,s[i])
#print(a)
for i in range(k):
if(a[i]==0):
print("IMPOSSIBLE")
exit(0)
for i in range(len(s)):
if(sl[i]=='?'):
sl.pop(i)
sl.insert(i,'a')
#print(sl)
if(sl == sl[::-1]):
ans = ''
for i in sl:
ans+=i
print(ans)
else:
print("IMPOSSIBLE")
```
| 96,569
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Vasya has recently finished writing a book. Now he faces the problem of giving it the title. Vasya wants the title to be vague and mysterious for his book to be noticeable among others. That's why the title should be represented by a single word containing at least once each of the first k Latin letters and not containing any other ones. Also, the title should be a palindrome, that is it should be read similarly from the left to the right and from the right to the left.
Vasya has already composed the approximate variant of the title. You are given the title template s consisting of lowercase Latin letters and question marks. Your task is to replace all the question marks by lowercase Latin letters so that the resulting word satisfies the requirements, described above. Each question mark should be replaced by exactly one letter, it is not allowed to delete characters or add new ones to the template. If there are several suitable titles, choose the first in the alphabetical order, for Vasya's book to appear as early as possible in all the catalogues.
Input
The first line contains an integer k (1 ≤ k ≤ 26) which is the number of allowed alphabet letters. The second line contains s which is the given template. In s only the first k lowercase letters of Latin alphabet and question marks can be present, the length of s is from 1 to 100 characters inclusively.
Output
If there is no solution, print IMPOSSIBLE. Otherwise, a single line should contain the required title, satisfying the given template. The title should be a palindrome and it can only contain the first k letters of the Latin alphabet. At that, each of those k letters must be present at least once. If there are several suitable titles, print the lexicographically minimal one.
The lexicographical comparison is performed by the standard < operator in modern programming languages. The line a is lexicographically smaller than the line b, if exists such an i (1 ≤ i ≤ |s|), that ai < bi, and for any j (1 ≤ j < i) aj = bj. |s| stands for the length of the given template.
Examples
Input
3
a?c
Output
IMPOSSIBLE
Input
2
a??a
Output
abba
Input
2
?b?a
Output
abba
Tags: expression parsing
Correct Solution:
```
import sys
k = int(input())
s = list(input())
used = [False] * k
for i in range(len(s)):
if '?' not in (s[i], s[-i - 1]) and \
s[i] != s[-i - 1]:
print('IMPOSSIBLE')
sys.exit(0)
if s[i] != '?':
if s[-i - 1] == '?':
s[-i - 1] = s[i]
used[ord(s[i]) - ord('a')] = True
if len(s) % 2 and s[len(s) // 2] == '?':
doUnused = True
for j in range(k - 1, -1, -1):
if not used[j]:
s[len(s) // 2] = chr(ord('a') + j)
used[j] = True
doUnused = False
break
if doUnused:
s[len(s) // 2] = 'a'
for i in range((len(s) - 2) // 2, -1, -1):
if s[i] == '?':
doUnused = True
for j in range(k - 1, -1, -1):
if not used[j]:
s[i] = chr(ord('a') + j)
s[-i - 1] = s[i]
used[j] = True
doUnused = False
break
if doUnused:
s[i] = 'a'
s[-i - 1] = 'a'
if not all(used):
print('IMPOSSIBLE')
else:
print(''.join(s))
```
| 96,570
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Vasya has recently finished writing a book. Now he faces the problem of giving it the title. Vasya wants the title to be vague and mysterious for his book to be noticeable among others. That's why the title should be represented by a single word containing at least once each of the first k Latin letters and not containing any other ones. Also, the title should be a palindrome, that is it should be read similarly from the left to the right and from the right to the left.
Vasya has already composed the approximate variant of the title. You are given the title template s consisting of lowercase Latin letters and question marks. Your task is to replace all the question marks by lowercase Latin letters so that the resulting word satisfies the requirements, described above. Each question mark should be replaced by exactly one letter, it is not allowed to delete characters or add new ones to the template. If there are several suitable titles, choose the first in the alphabetical order, for Vasya's book to appear as early as possible in all the catalogues.
Input
The first line contains an integer k (1 ≤ k ≤ 26) which is the number of allowed alphabet letters. The second line contains s which is the given template. In s only the first k lowercase letters of Latin alphabet and question marks can be present, the length of s is from 1 to 100 characters inclusively.
Output
If there is no solution, print IMPOSSIBLE. Otherwise, a single line should contain the required title, satisfying the given template. The title should be a palindrome and it can only contain the first k letters of the Latin alphabet. At that, each of those k letters must be present at least once. If there are several suitable titles, print the lexicographically minimal one.
The lexicographical comparison is performed by the standard < operator in modern programming languages. The line a is lexicographically smaller than the line b, if exists such an i (1 ≤ i ≤ |s|), that ai < bi, and for any j (1 ≤ j < i) aj = bj. |s| stands for the length of the given template.
Examples
Input
3
a?c
Output
IMPOSSIBLE
Input
2
a??a
Output
abba
Input
2
?b?a
Output
abba
Tags: expression parsing
Correct Solution:
```
k = int(input())
s = input()
ans = ['' for _ in range(len(s))]
r = set([chr(ord('a')+x) for x in range(k)]) - set(s)
r = list(r)
r.sort(reverse=True)
c = 0
for i in range(len(s)//2):
if s[i] == '?' and s[-i - 1] == '?':
c += 1
if len(s) % 2 == 1 and s[len(s)//2] == '?':
c += 1
c -= len(r)
for i in range(len(s)//2):
if s[i] == '?' and s[-i-1] == '?':
if c > 0:
ans[i] = 'a'
c -= 1
else:
ans[i] = r.pop()
ans[-i-1] = ans[i]
elif s[i] == '?':
ans[i] = ans[-i-1] = s[-i-1]
elif s[-i-1] == '?':
ans[-i-1] = ans[i] = s[i]
else:
if s[i] == s[-i-1]:
ans[i] = ans[-i-1] = s[i]
else:
print('IMPOSSIBLE')
break
else:
if len(s) % 2 == 1:
if s[len(s)//2] == '?':
if r:
ans[len(s)//2] = r.pop()
else:
ans[len(s)//2] = 'a'
else:
ans[len(s)//2] = s[len(s)//2]
if r:
print('IMPOSSIBLE')
else:
print(*ans, sep='')
```
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Vasya has recently finished writing a book. Now he faces the problem of giving it the title. Vasya wants the title to be vague and mysterious for his book to be noticeable among others. That's why the title should be represented by a single word containing at least once each of the first k Latin letters and not containing any other ones. Also, the title should be a palindrome, that is it should be read similarly from the left to the right and from the right to the left.
Vasya has already composed the approximate variant of the title. You are given the title template s consisting of lowercase Latin letters and question marks. Your task is to replace all the question marks by lowercase Latin letters so that the resulting word satisfies the requirements, described above. Each question mark should be replaced by exactly one letter, it is not allowed to delete characters or add new ones to the template. If there are several suitable titles, choose the first in the alphabetical order, for Vasya's book to appear as early as possible in all the catalogues.
Input
The first line contains an integer k (1 ≤ k ≤ 26) which is the number of allowed alphabet letters. The second line contains s which is the given template. In s only the first k lowercase letters of Latin alphabet and question marks can be present, the length of s is from 1 to 100 characters inclusively.
Output
If there is no solution, print IMPOSSIBLE. Otherwise, a single line should contain the required title, satisfying the given template. The title should be a palindrome and it can only contain the first k letters of the Latin alphabet. At that, each of those k letters must be present at least once. If there are several suitable titles, print the lexicographically minimal one.
The lexicographical comparison is performed by the standard < operator in modern programming languages. The line a is lexicographically smaller than the line b, if exists such an i (1 ≤ i ≤ |s|), that ai < bi, and for any j (1 ≤ j < i) aj = bj. |s| stands for the length of the given template.
Examples
Input
3
a?c
Output
IMPOSSIBLE
Input
2
a??a
Output
abba
Input
2
?b?a
Output
abba
Tags: expression parsing
Correct Solution:
```
import sys, string
k = int(input())
pal = list(input().strip())
n = len(pal)
center = (n-1)//2
for i in range(center+1):
j = n-1-i
if pal[i] == pal[j]:
continue
if pal[i] == '?':
pal[i] = pal[j]
elif pal[j] == '?':
pal[j] = pal[i]
else:
print('IMPOSSIBLE')
sys.exit()
need = []
for ch in string.ascii_letters[:k]:
if ch not in pal:
need.append(ch)
nix = len(need)-1
for i in range(center, -1, -1):
if pal[i] != '?':
continue
j = n-i-1
if nix == -1:
pal[i] = pal[j] = 'a'
else:
pal[i] = pal[j] = need[nix]
nix -= 1
if nix != -1:
print('IMPOSSIBLE')
else:
print(''.join(pal))
# Made By Mostafa_Khaled
```
| 96,572
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Vasya has recently finished writing a book. Now he faces the problem of giving it the title. Vasya wants the title to be vague and mysterious for his book to be noticeable among others. That's why the title should be represented by a single word containing at least once each of the first k Latin letters and not containing any other ones. Also, the title should be a palindrome, that is it should be read similarly from the left to the right and from the right to the left.
Vasya has already composed the approximate variant of the title. You are given the title template s consisting of lowercase Latin letters and question marks. Your task is to replace all the question marks by lowercase Latin letters so that the resulting word satisfies the requirements, described above. Each question mark should be replaced by exactly one letter, it is not allowed to delete characters or add new ones to the template. If there are several suitable titles, choose the first in the alphabetical order, for Vasya's book to appear as early as possible in all the catalogues.
Input
The first line contains an integer k (1 ≤ k ≤ 26) which is the number of allowed alphabet letters. The second line contains s which is the given template. In s only the first k lowercase letters of Latin alphabet and question marks can be present, the length of s is from 1 to 100 characters inclusively.
Output
If there is no solution, print IMPOSSIBLE. Otherwise, a single line should contain the required title, satisfying the given template. The title should be a palindrome and it can only contain the first k letters of the Latin alphabet. At that, each of those k letters must be present at least once. If there are several suitable titles, print the lexicographically minimal one.
The lexicographical comparison is performed by the standard < operator in modern programming languages. The line a is lexicographically smaller than the line b, if exists such an i (1 ≤ i ≤ |s|), that ai < bi, and for any j (1 ≤ j < i) aj = bj. |s| stands for the length of the given template.
Examples
Input
3
a?c
Output
IMPOSSIBLE
Input
2
a??a
Output
abba
Input
2
?b?a
Output
abba
Tags: expression parsing
Correct Solution:
```
def f():
k, t = int(input()), input()
j, n = 0, (len(t) + 1) // 2
p = [0] * n
q = 'abcdefghijklmnopqrstuvwxyz'[: k]
r = {x: 0 for x in q}
r['?'] = 0
for i in range(n):
x, y = t[i], t[- 1 - i]
if x == '?': x = y
elif y != '?' and x != y: return 'IMPOSSIBLE'
if not x in r: return 'IMPOSSIBLE'
r[x] += 1
p[i] = x
y = ''.join(x for x in q if not r[x])
if len(y) > r['?']: return 'IMPOSSIBLE'
y = 'a' * (r['?'] - len(y)) + y
for i in range(n):
if p[i] == '?':
p[i] = y[j]
j += 1
p += reversed(p[: len(t) // 2])
return ''.join(p)
print(f())
```
| 96,573
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Vasya has recently finished writing a book. Now he faces the problem of giving it the title. Vasya wants the title to be vague and mysterious for his book to be noticeable among others. That's why the title should be represented by a single word containing at least once each of the first k Latin letters and not containing any other ones. Also, the title should be a palindrome, that is it should be read similarly from the left to the right and from the right to the left.
Vasya has already composed the approximate variant of the title. You are given the title template s consisting of lowercase Latin letters and question marks. Your task is to replace all the question marks by lowercase Latin letters so that the resulting word satisfies the requirements, described above. Each question mark should be replaced by exactly one letter, it is not allowed to delete characters or add new ones to the template. If there are several suitable titles, choose the first in the alphabetical order, for Vasya's book to appear as early as possible in all the catalogues.
Input
The first line contains an integer k (1 ≤ k ≤ 26) which is the number of allowed alphabet letters. The second line contains s which is the given template. In s only the first k lowercase letters of Latin alphabet and question marks can be present, the length of s is from 1 to 100 characters inclusively.
Output
If there is no solution, print IMPOSSIBLE. Otherwise, a single line should contain the required title, satisfying the given template. The title should be a palindrome and it can only contain the first k letters of the Latin alphabet. At that, each of those k letters must be present at least once. If there are several suitable titles, print the lexicographically minimal one.
The lexicographical comparison is performed by the standard < operator in modern programming languages. The line a is lexicographically smaller than the line b, if exists such an i (1 ≤ i ≤ |s|), that ai < bi, and for any j (1 ≤ j < i) aj = bj. |s| stands for the length of the given template.
Examples
Input
3
a?c
Output
IMPOSSIBLE
Input
2
a??a
Output
abba
Input
2
?b?a
Output
abba
Tags: expression parsing
Correct Solution:
```
Z='IMPOSSIBLE'
R=range
P=print
I=input
k=int(I())
s=list(I())
n=len(s)
for i in R(n):
if s[i]==s[n-i-1]:pass
elif s[i]=='?':s[i]=s[n-i-1]
elif s[n-i-1]=='?':s[n-i-1]=s[i]
else:P(Z);exit()
d=set(chr(i)for i in R(97,97+k)if chr(i) not in s)
for i in R(n//2,-1,-1):
if len(d) and s[i]=='?':s[i]=s[n-i-1]=max(d);d.remove(max(d))
s=''.join(s).replace('?','a')
P([Z,s][set(s)==set(chr(i)for i in R(97,97+k))])
```
| 96,574
|
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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.
Vasya has recently finished writing a book. Now he faces the problem of giving it the title. Vasya wants the title to be vague and mysterious for his book to be noticeable among others. That's why the title should be represented by a single word containing at least once each of the first k Latin letters and not containing any other ones. Also, the title should be a palindrome, that is it should be read similarly from the left to the right and from the right to the left.
Vasya has already composed the approximate variant of the title. You are given the title template s consisting of lowercase Latin letters and question marks. Your task is to replace all the question marks by lowercase Latin letters so that the resulting word satisfies the requirements, described above. Each question mark should be replaced by exactly one letter, it is not allowed to delete characters or add new ones to the template. If there are several suitable titles, choose the first in the alphabetical order, for Vasya's book to appear as early as possible in all the catalogues.
Input
The first line contains an integer k (1 ≤ k ≤ 26) which is the number of allowed alphabet letters. The second line contains s which is the given template. In s only the first k lowercase letters of Latin alphabet and question marks can be present, the length of s is from 1 to 100 characters inclusively.
Output
If there is no solution, print IMPOSSIBLE. Otherwise, a single line should contain the required title, satisfying the given template. The title should be a palindrome and it can only contain the first k letters of the Latin alphabet. At that, each of those k letters must be present at least once. If there are several suitable titles, print the lexicographically minimal one.
The lexicographical comparison is performed by the standard < operator in modern programming languages. The line a is lexicographically smaller than the line b, if exists such an i (1 ≤ i ≤ |s|), that ai < bi, and for any j (1 ≤ j < i) aj = bj. |s| stands for the length of the given template.
Examples
Input
3
a?c
Output
IMPOSSIBLE
Input
2
a??a
Output
abba
Input
2
?b?a
Output
abba
Submitted Solution:
```
'''''''''''
Author : code_marshal
'''''''''''
alp = ['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z']
k, s = int(input()), list(input())
ch = alp[:k]
i=j=0
if len(s)%2: i=len(s)//2; j=i+1
else: j=len(s)//2; i=j-1
while i>=0 or j<len(s):
if s[i]=='?':
if s[~i]!='?': s[i]=s[~i]
else:
lol = list(set(ch)-set(s)); lol.sort(reverse=True)
k = 0
for l in lol:k=l; break
if k==0: s[i]=s[~i]=ch[0]
else: s[i]=s[~i]=k
if '?' not in s: break
try:
if s[j]=='?':
if s[~j]!='?': s[j]=s[~j]
else:
lol = list(set(ch)-set(s)); lol.sort(reverse=True)
k = 0
for l in lol:k=l; break
if k==0: s[j]=s[~j]=ch[0]
else: s[j]=s[~j]=k
if '?' not in s: break
except: pass
i-=1;j+=1
if s[::-1]==s and not set(ch)-set(s): print(''.join(s))
else: print("IMPOSSIBLE")
```
Yes
| 96,575
|
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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.
Vasya has recently finished writing a book. Now he faces the problem of giving it the title. Vasya wants the title to be vague and mysterious for his book to be noticeable among others. That's why the title should be represented by a single word containing at least once each of the first k Latin letters and not containing any other ones. Also, the title should be a palindrome, that is it should be read similarly from the left to the right and from the right to the left.
Vasya has already composed the approximate variant of the title. You are given the title template s consisting of lowercase Latin letters and question marks. Your task is to replace all the question marks by lowercase Latin letters so that the resulting word satisfies the requirements, described above. Each question mark should be replaced by exactly one letter, it is not allowed to delete characters or add new ones to the template. If there are several suitable titles, choose the first in the alphabetical order, for Vasya's book to appear as early as possible in all the catalogues.
Input
The first line contains an integer k (1 ≤ k ≤ 26) which is the number of allowed alphabet letters. The second line contains s which is the given template. In s only the first k lowercase letters of Latin alphabet and question marks can be present, the length of s is from 1 to 100 characters inclusively.
Output
If there is no solution, print IMPOSSIBLE. Otherwise, a single line should contain the required title, satisfying the given template. The title should be a palindrome and it can only contain the first k letters of the Latin alphabet. At that, each of those k letters must be present at least once. If there are several suitable titles, print the lexicographically minimal one.
The lexicographical comparison is performed by the standard < operator in modern programming languages. The line a is lexicographically smaller than the line b, if exists such an i (1 ≤ i ≤ |s|), that ai < bi, and for any j (1 ≤ j < i) aj = bj. |s| stands for the length of the given template.
Examples
Input
3
a?c
Output
IMPOSSIBLE
Input
2
a??a
Output
abba
Input
2
?b?a
Output
abba
Submitted Solution:
```
n = int(input())
add = [False for i in range(n)]
# l = [int(i) for i in range(n)]
s = input()
v = []
for i in range(len(s)):
v.append(s[i])
if s[i] != '?':
add[ord(s[i])-97] = True
if len(s)%2 == 1:
i = len(s)//2
j = len(s)//2
else:
i = (len(s)//2)-1
j = len(s)//2
# print(i, j)
while i >= 0:
if v[i] == '?':
if v[j] == '?':
id = -1
for k in range(n-1, -1, -1):
if add[k] == False:
id = k
break
else:
id = 0
# print(i, j, id)
v[i] = chr(id+97)
v[j] = chr(id+97)
add[id] = True
else:
v[i] = v[j]
else:
if v[j] == '?':
v[j] = v[i]
else:
if v[i] != v[j]:
print("IMPOSSIBLE")
exit()
i-=1
j+=1
# print(add)
for i in range(n):
if add[i] == False:
# print("oi")
print("IMPOSSIBLE")
exit()
for i in range(len(v)):
print(v[i], end='')
print()
```
Yes
| 96,576
|
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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.
Vasya has recently finished writing a book. Now he faces the problem of giving it the title. Vasya wants the title to be vague and mysterious for his book to be noticeable among others. That's why the title should be represented by a single word containing at least once each of the first k Latin letters and not containing any other ones. Also, the title should be a palindrome, that is it should be read similarly from the left to the right and from the right to the left.
Vasya has already composed the approximate variant of the title. You are given the title template s consisting of lowercase Latin letters and question marks. Your task is to replace all the question marks by lowercase Latin letters so that the resulting word satisfies the requirements, described above. Each question mark should be replaced by exactly one letter, it is not allowed to delete characters or add new ones to the template. If there are several suitable titles, choose the first in the alphabetical order, for Vasya's book to appear as early as possible in all the catalogues.
Input
The first line contains an integer k (1 ≤ k ≤ 26) which is the number of allowed alphabet letters. The second line contains s which is the given template. In s only the first k lowercase letters of Latin alphabet and question marks can be present, the length of s is from 1 to 100 characters inclusively.
Output
If there is no solution, print IMPOSSIBLE. Otherwise, a single line should contain the required title, satisfying the given template. The title should be a palindrome and it can only contain the first k letters of the Latin alphabet. At that, each of those k letters must be present at least once. If there are several suitable titles, print the lexicographically minimal one.
The lexicographical comparison is performed by the standard < operator in modern programming languages. The line a is lexicographically smaller than the line b, if exists such an i (1 ≤ i ≤ |s|), that ai < bi, and for any j (1 ≤ j < i) aj = bj. |s| stands for the length of the given template.
Examples
Input
3
a?c
Output
IMPOSSIBLE
Input
2
a??a
Output
abba
Input
2
?b?a
Output
abba
Submitted Solution:
```
import sys, string
k = int(input())
pal = list(input().strip())
n = len(pal)
center = (n-1)//2
for i in range(center+1):
j = n-1-i
if pal[i] == pal[j]:
continue
if pal[i] == '?':
pal[i] = pal[j]
elif pal[j] == '?':
pal[j] = pal[i]
else:
print('IMPOSSIBLE')
sys.exit()
need = []
for ch in string.ascii_letters[:k]:
if ch not in pal:
need.append(ch)
nix = len(need)-1
for i in range(center, -1, -1):
if pal[i] != '?':
continue
j = n-i-1
if nix == -1:
pal[i] = pal[j] = 'a'
else:
pal[i] = pal[j] = need[nix]
nix -= 1
if nix != -1:
print('IMPOSSIBLE')
else:
print(''.join(pal))
```
Yes
| 96,577
|
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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.
Vasya has recently finished writing a book. Now he faces the problem of giving it the title. Vasya wants the title to be vague and mysterious for his book to be noticeable among others. That's why the title should be represented by a single word containing at least once each of the first k Latin letters and not containing any other ones. Also, the title should be a palindrome, that is it should be read similarly from the left to the right and from the right to the left.
Vasya has already composed the approximate variant of the title. You are given the title template s consisting of lowercase Latin letters and question marks. Your task is to replace all the question marks by lowercase Latin letters so that the resulting word satisfies the requirements, described above. Each question mark should be replaced by exactly one letter, it is not allowed to delete characters or add new ones to the template. If there are several suitable titles, choose the first in the alphabetical order, for Vasya's book to appear as early as possible in all the catalogues.
Input
The first line contains an integer k (1 ≤ k ≤ 26) which is the number of allowed alphabet letters. The second line contains s which is the given template. In s only the first k lowercase letters of Latin alphabet and question marks can be present, the length of s is from 1 to 100 characters inclusively.
Output
If there is no solution, print IMPOSSIBLE. Otherwise, a single line should contain the required title, satisfying the given template. The title should be a palindrome and it can only contain the first k letters of the Latin alphabet. At that, each of those k letters must be present at least once. If there are several suitable titles, print the lexicographically minimal one.
The lexicographical comparison is performed by the standard < operator in modern programming languages. The line a is lexicographically smaller than the line b, if exists such an i (1 ≤ i ≤ |s|), that ai < bi, and for any j (1 ≤ j < i) aj = bj. |s| stands for the length of the given template.
Examples
Input
3
a?c
Output
IMPOSSIBLE
Input
2
a??a
Output
abba
Input
2
?b?a
Output
abba
Submitted Solution:
```
k=int(input())
s=list(input())
n=len(s)
ali=0;
for i in range(n):
if s[i]==s[n-i-1]: ali+=1;
elif s[i]=='?': s[i]=s[n-i-1]
elif s[n-i-1]=='?': s[n-i-1]=s[i]
else:
print('IMPOSSIBLE')
exit()
d=set(chr(i+97) for i in range(k) if chr(i+97) not in s)
#print(d)
for i in range(n//2,-1,-1):
if s[i]==s[n-i-1]=='?':
if len(d):
s[i]=s[n-i-1]=max(d)
d.remove(max(d))
else:
s[i]=s[n-i-1]='a'
if d:
print('IMPOSSIBLE')
else:
print(*s,sep='')
```
Yes
| 96,578
|
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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.
Vasya has recently finished writing a book. Now he faces the problem of giving it the title. Vasya wants the title to be vague and mysterious for his book to be noticeable among others. That's why the title should be represented by a single word containing at least once each of the first k Latin letters and not containing any other ones. Also, the title should be a palindrome, that is it should be read similarly from the left to the right and from the right to the left.
Vasya has already composed the approximate variant of the title. You are given the title template s consisting of lowercase Latin letters and question marks. Your task is to replace all the question marks by lowercase Latin letters so that the resulting word satisfies the requirements, described above. Each question mark should be replaced by exactly one letter, it is not allowed to delete characters or add new ones to the template. If there are several suitable titles, choose the first in the alphabetical order, for Vasya's book to appear as early as possible in all the catalogues.
Input
The first line contains an integer k (1 ≤ k ≤ 26) which is the number of allowed alphabet letters. The second line contains s which is the given template. In s only the first k lowercase letters of Latin alphabet and question marks can be present, the length of s is from 1 to 100 characters inclusively.
Output
If there is no solution, print IMPOSSIBLE. Otherwise, a single line should contain the required title, satisfying the given template. The title should be a palindrome and it can only contain the first k letters of the Latin alphabet. At that, each of those k letters must be present at least once. If there are several suitable titles, print the lexicographically minimal one.
The lexicographical comparison is performed by the standard < operator in modern programming languages. The line a is lexicographically smaller than the line b, if exists such an i (1 ≤ i ≤ |s|), that ai < bi, and for any j (1 ≤ j < i) aj = bj. |s| stands for the length of the given template.
Examples
Input
3
a?c
Output
IMPOSSIBLE
Input
2
a??a
Output
abba
Input
2
?b?a
Output
abba
Submitted Solution:
```
def ii():return int(input())
def si():return input()
def mi():return map(int,input().split())
def li():return list(mi())
abc="abcdefghijklmnopqrstuvwxyz"
n=ii()
s=si()
k=len(s)
c=0
b=[]
f=0
for i in range(k):
if(s[i]==s[k-i-1] or s[k-i-1]=='?'):
b.append(s[i])
elif(s[i]==s[k-i-1] or s[i]=='?'):
b.append(s[k-i-1])
else:
f=1
print("IMPOSSIBLE")
break
c+=1
if(c==n):
break
if(f==0):
if((2*n)>k):
print("IMPOSSIBLE")
f=1
d=[]
for i in range(n,k-n):
if(s[i]=='?' and s[k-i-1]=='?'):
d.append('c')
if(s[i]==s[k-i-1] or s[k-i-1]=='?'):
d.append(s[i])
elif(s[i]==s[k-i-1] or s[i]=='?'):
d.append(s[k-i-1])
else:
if(f==0):
print("IMPOSSIBLE")
f=1
break
if(f==0):
for i in range(n):
if(b[i]=='?'):
for j in range(26):
if(abc[j] not in b):
b[i]=abc[j]
break
for i in range(n):
print(b[i],end="")
b.reverse()
for i in d:
print(i,end="")
for i in range(k-n,k):
print(b[i-k+n],end="")
print()
```
No
| 96,579
|
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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.
Vasya has recently finished writing a book. Now he faces the problem of giving it the title. Vasya wants the title to be vague and mysterious for his book to be noticeable among others. That's why the title should be represented by a single word containing at least once each of the first k Latin letters and not containing any other ones. Also, the title should be a palindrome, that is it should be read similarly from the left to the right and from the right to the left.
Vasya has already composed the approximate variant of the title. You are given the title template s consisting of lowercase Latin letters and question marks. Your task is to replace all the question marks by lowercase Latin letters so that the resulting word satisfies the requirements, described above. Each question mark should be replaced by exactly one letter, it is not allowed to delete characters or add new ones to the template. If there are several suitable titles, choose the first in the alphabetical order, for Vasya's book to appear as early as possible in all the catalogues.
Input
The first line contains an integer k (1 ≤ k ≤ 26) which is the number of allowed alphabet letters. The second line contains s which is the given template. In s only the first k lowercase letters of Latin alphabet and question marks can be present, the length of s is from 1 to 100 characters inclusively.
Output
If there is no solution, print IMPOSSIBLE. Otherwise, a single line should contain the required title, satisfying the given template. The title should be a palindrome and it can only contain the first k letters of the Latin alphabet. At that, each of those k letters must be present at least once. If there are several suitable titles, print the lexicographically minimal one.
The lexicographical comparison is performed by the standard < operator in modern programming languages. The line a is lexicographically smaller than the line b, if exists such an i (1 ≤ i ≤ |s|), that ai < bi, and for any j (1 ≤ j < i) aj = bj. |s| stands for the length of the given template.
Examples
Input
3
a?c
Output
IMPOSSIBLE
Input
2
a??a
Output
abba
Input
2
?b?a
Output
abba
Submitted Solution:
```
def palind(ch):
ch1=""
for i in ch:
ch1=i+ch1
return ch1
l='abcdefghijklmnopqrstuvwxyz'
k=int(input())
ch=input()
l=l[:k]
l1=""
x=0
D=[]
for i in ch:
D.append(i)
if i=="?":
x+=1
for i in l:
if i not in ch and i!="?":
l1+=i
if (len(l1)>x//2 and x%2==0 )or (len(l1)>x//2+1 and x%2==1 ):
print("IMPOSSIBLE")
elif k==1:
ch1=""
for j in range(len(ch)):
ch1+="a"
print(ch1)
else:
B=True
for i in range(len(ch)//2+2):
if D[i]=="?" and D[len(ch)-i-1]=="?" and l1!="":
D[i]=l1[0]
D[len(ch)-i-1]=l1[0]
l1=l1[1:]
if l1=="":
B=False
elif D[i]=="?" and D[len(ch)-i-1]=="?" and l1=="":
l1=l
B=False
D[i]=l1[0]
D[len(ch)-i-1]=l1[0]
elif D[i]=="?" and D[len(ch)-i-1]!="?":
D[i]=D[len(D)-i-1]
elif D[i]!="?" and D[len(ch)-i-1]=="?":
D[len(D)-i-1]=D[i]
if len(l1)==0:
B=False
if B==True:
print("IMPOSSIBLE")
else:
fin=""
for j in D:
fin+=j
if palind(fin)==fin:
print(fin)
else:
print("IMPOSSIBLE")
```
No
| 96,580
|
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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.
Vasya has recently finished writing a book. Now he faces the problem of giving it the title. Vasya wants the title to be vague and mysterious for his book to be noticeable among others. That's why the title should be represented by a single word containing at least once each of the first k Latin letters and not containing any other ones. Also, the title should be a palindrome, that is it should be read similarly from the left to the right and from the right to the left.
Vasya has already composed the approximate variant of the title. You are given the title template s consisting of lowercase Latin letters and question marks. Your task is to replace all the question marks by lowercase Latin letters so that the resulting word satisfies the requirements, described above. Each question mark should be replaced by exactly one letter, it is not allowed to delete characters or add new ones to the template. If there are several suitable titles, choose the first in the alphabetical order, for Vasya's book to appear as early as possible in all the catalogues.
Input
The first line contains an integer k (1 ≤ k ≤ 26) which is the number of allowed alphabet letters. The second line contains s which is the given template. In s only the first k lowercase letters of Latin alphabet and question marks can be present, the length of s is from 1 to 100 characters inclusively.
Output
If there is no solution, print IMPOSSIBLE. Otherwise, a single line should contain the required title, satisfying the given template. The title should be a palindrome and it can only contain the first k letters of the Latin alphabet. At that, each of those k letters must be present at least once. If there are several suitable titles, print the lexicographically minimal one.
The lexicographical comparison is performed by the standard < operator in modern programming languages. The line a is lexicographically smaller than the line b, if exists such an i (1 ≤ i ≤ |s|), that ai < bi, and for any j (1 ≤ j < i) aj = bj. |s| stands for the length of the given template.
Examples
Input
3
a?c
Output
IMPOSSIBLE
Input
2
a??a
Output
abba
Input
2
?b?a
Output
abba
Submitted Solution:
```
k = int(input())
s = input()
c = set('abcdefghijklmnopqrstuvwxyz'[:k])
for a in s:
if a != '?' and a in c:
c.remove(a)
for i in range(len(s)):
if s[i] == '?':
if s[-(i+1)] != '?':
s = s[:i] + s[-(i+1)] + s[i+1:]
if s[i] in c:
c.remove(s[i])
for i in range(len(s)):
if s[i] == '?':
if len(c) > 0:
r = c.pop()
else:
r = 'a'
s = s[:i] + r + s[i+1:len(s)-i-1] + r + s[len(s) - i:]
if len(c) > 0 or s != s[::-1]:
print("IMPOSSIBLE")
else:
print(s)
```
No
| 96,581
|
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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.
Vasya has recently finished writing a book. Now he faces the problem of giving it the title. Vasya wants the title to be vague and mysterious for his book to be noticeable among others. That's why the title should be represented by a single word containing at least once each of the first k Latin letters and not containing any other ones. Also, the title should be a palindrome, that is it should be read similarly from the left to the right and from the right to the left.
Vasya has already composed the approximate variant of the title. You are given the title template s consisting of lowercase Latin letters and question marks. Your task is to replace all the question marks by lowercase Latin letters so that the resulting word satisfies the requirements, described above. Each question mark should be replaced by exactly one letter, it is not allowed to delete characters or add new ones to the template. If there are several suitable titles, choose the first in the alphabetical order, for Vasya's book to appear as early as possible in all the catalogues.
Input
The first line contains an integer k (1 ≤ k ≤ 26) which is the number of allowed alphabet letters. The second line contains s which is the given template. In s only the first k lowercase letters of Latin alphabet and question marks can be present, the length of s is from 1 to 100 characters inclusively.
Output
If there is no solution, print IMPOSSIBLE. Otherwise, a single line should contain the required title, satisfying the given template. The title should be a palindrome and it can only contain the first k letters of the Latin alphabet. At that, each of those k letters must be present at least once. If there are several suitable titles, print the lexicographically minimal one.
The lexicographical comparison is performed by the standard < operator in modern programming languages. The line a is lexicographically smaller than the line b, if exists such an i (1 ≤ i ≤ |s|), that ai < bi, and for any j (1 ≤ j < i) aj = bj. |s| stands for the length of the given template.
Examples
Input
3
a?c
Output
IMPOSSIBLE
Input
2
a??a
Output
abba
Input
2
?b?a
Output
abba
Submitted Solution:
```
from sys import stdin
def main():
n = int(stdin.readline())
line = stdin.readline().strip()
i,j = 0,len(line)-1
ans = ["" for i in range(len(line))]
visited = [False for i in range(27)]
ok = True
while(i<=j):
if(line[i] == "?" and line[j] != "?"):
ans[i] = line[j]
ans[j] = line[j]
visited[ord(line[j])-97] = True
elif(line[i] != "?" and line[j] == "?"):
ans[i] = line[i]
ans[j] = line[i]
visited[ord(line[i])-97] = True
elif(line[i] != "?" and line[j] != "?"and line[i] == line[j]):
ans[i]= line[i]
ans[j]= line[i]
elif(line[i] == "?" and line[j] == "?"):
for k in range(n):
if(not visited[k]):
visited[k] = True
ans[i] = chr(k+97)
ans[j] = chr(k+97)
if(ans[i] == "?" and ans[j] == "?"):
ans[i] = "a"
ans[j] = "a"
else:
ok = False
i,j=i+1,j-1
if(ok):
aux = ""
for u in range(len(ans)):
aux+=ans[u]
print(aux)
else:
print("IMPOSSIBLE")
main()
```
No
| 96,582
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
ZS the Coder is coding on a crazy computer. If you don't type in a word for a c consecutive seconds, everything you typed disappear!
More formally, if you typed a word at second a and then the next word at second b, then if b - a ≤ c, just the new word is appended to other words on the screen. If b - a > c, then everything on the screen disappears and after that the word you have typed appears on the screen.
For example, if c = 5 and you typed words at seconds 1, 3, 8, 14, 19, 20 then at the second 8 there will be 3 words on the screen. After that, everything disappears at the second 13 because nothing was typed. At the seconds 14 and 19 another two words are typed, and finally, at the second 20, one more word is typed, and a total of 3 words remain on the screen.
You're given the times when ZS the Coder typed the words. Determine how many words remain on the screen after he finished typing everything.
Input
The first line contains two integers n and c (1 ≤ n ≤ 100 000, 1 ≤ c ≤ 109) — the number of words ZS the Coder typed and the crazy computer delay respectively.
The next line contains n integers t1, t2, ..., tn (1 ≤ t1 < t2 < ... < tn ≤ 109), where ti denotes the second when ZS the Coder typed the i-th word.
Output
Print a single positive integer, the number of words that remain on the screen after all n words was typed, in other words, at the second tn.
Examples
Input
6 5
1 3 8 14 19 20
Output
3
Input
6 1
1 3 5 7 9 10
Output
2
Note
The first sample is already explained in the problem statement.
For the second sample, after typing the first word at the second 1, it disappears because the next word is typed at the second 3 and 3 - 1 > 1. Similarly, only 1 word will remain at the second 9. Then, a word is typed at the second 10, so there will be two words on the screen, as the old word won't disappear because 10 - 9 ≤ 1.
Tags: implementation
Correct Solution:
```
n,c=map(int, input().split())
t=[int(t) for t in input().split()]
r=1
for i in range(n-1):
if t[i+1]-t[i]<=c:
r+=1
else:
r=1
print(r)
```
| 96,631
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
ZS the Coder is coding on a crazy computer. If you don't type in a word for a c consecutive seconds, everything you typed disappear!
More formally, if you typed a word at second a and then the next word at second b, then if b - a ≤ c, just the new word is appended to other words on the screen. If b - a > c, then everything on the screen disappears and after that the word you have typed appears on the screen.
For example, if c = 5 and you typed words at seconds 1, 3, 8, 14, 19, 20 then at the second 8 there will be 3 words on the screen. After that, everything disappears at the second 13 because nothing was typed. At the seconds 14 and 19 another two words are typed, and finally, at the second 20, one more word is typed, and a total of 3 words remain on the screen.
You're given the times when ZS the Coder typed the words. Determine how many words remain on the screen after he finished typing everything.
Input
The first line contains two integers n and c (1 ≤ n ≤ 100 000, 1 ≤ c ≤ 109) — the number of words ZS the Coder typed and the crazy computer delay respectively.
The next line contains n integers t1, t2, ..., tn (1 ≤ t1 < t2 < ... < tn ≤ 109), where ti denotes the second when ZS the Coder typed the i-th word.
Output
Print a single positive integer, the number of words that remain on the screen after all n words was typed, in other words, at the second tn.
Examples
Input
6 5
1 3 8 14 19 20
Output
3
Input
6 1
1 3 5 7 9 10
Output
2
Note
The first sample is already explained in the problem statement.
For the second sample, after typing the first word at the second 1, it disappears because the next word is typed at the second 3 and 3 - 1 > 1. Similarly, only 1 word will remain at the second 9. Then, a word is typed at the second 10, so there will be two words on the screen, as the old word won't disappear because 10 - 9 ≤ 1.
Tags: implementation
Correct Solution:
```
import sys
from collections import defaultdict, Counter
import string
def main():
n, c = [int(i) for i in input().split()]
t = [int(i) for i in input().split()]
words = 1
for i, j in zip(t[:-1], t[1:]):
if j - i > c:
words = 1
else:
words += 1
print(words)
if __name__ == '__main__':
main()
```
| 96,632
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
ZS the Coder is coding on a crazy computer. If you don't type in a word for a c consecutive seconds, everything you typed disappear!
More formally, if you typed a word at second a and then the next word at second b, then if b - a ≤ c, just the new word is appended to other words on the screen. If b - a > c, then everything on the screen disappears and after that the word you have typed appears on the screen.
For example, if c = 5 and you typed words at seconds 1, 3, 8, 14, 19, 20 then at the second 8 there will be 3 words on the screen. After that, everything disappears at the second 13 because nothing was typed. At the seconds 14 and 19 another two words are typed, and finally, at the second 20, one more word is typed, and a total of 3 words remain on the screen.
You're given the times when ZS the Coder typed the words. Determine how many words remain on the screen after he finished typing everything.
Input
The first line contains two integers n and c (1 ≤ n ≤ 100 000, 1 ≤ c ≤ 109) — the number of words ZS the Coder typed and the crazy computer delay respectively.
The next line contains n integers t1, t2, ..., tn (1 ≤ t1 < t2 < ... < tn ≤ 109), where ti denotes the second when ZS the Coder typed the i-th word.
Output
Print a single positive integer, the number of words that remain on the screen after all n words was typed, in other words, at the second tn.
Examples
Input
6 5
1 3 8 14 19 20
Output
3
Input
6 1
1 3 5 7 9 10
Output
2
Note
The first sample is already explained in the problem statement.
For the second sample, after typing the first word at the second 1, it disappears because the next word is typed at the second 3 and 3 - 1 > 1. Similarly, only 1 word will remain at the second 9. Then, a word is typed at the second 10, so there will be two words on the screen, as the old word won't disappear because 10 - 9 ≤ 1.
Tags: implementation
Correct Solution:
```
#Codeforce 716A
n,c = (int(v) for v in input().split())
list1=[int(u) for u in input().split()]
list1=list1[::-1]
ans=1
for i in range(1,n):
if list1[i-1] - list1[i] <= c:
ans += 1
else:
break
print(ans)
```
| 96,633
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
ZS the Coder is coding on a crazy computer. If you don't type in a word for a c consecutive seconds, everything you typed disappear!
More formally, if you typed a word at second a and then the next word at second b, then if b - a ≤ c, just the new word is appended to other words on the screen. If b - a > c, then everything on the screen disappears and after that the word you have typed appears on the screen.
For example, if c = 5 and you typed words at seconds 1, 3, 8, 14, 19, 20 then at the second 8 there will be 3 words on the screen. After that, everything disappears at the second 13 because nothing was typed. At the seconds 14 and 19 another two words are typed, and finally, at the second 20, one more word is typed, and a total of 3 words remain on the screen.
You're given the times when ZS the Coder typed the words. Determine how many words remain on the screen after he finished typing everything.
Input
The first line contains two integers n and c (1 ≤ n ≤ 100 000, 1 ≤ c ≤ 109) — the number of words ZS the Coder typed and the crazy computer delay respectively.
The next line contains n integers t1, t2, ..., tn (1 ≤ t1 < t2 < ... < tn ≤ 109), where ti denotes the second when ZS the Coder typed the i-th word.
Output
Print a single positive integer, the number of words that remain on the screen after all n words was typed, in other words, at the second tn.
Examples
Input
6 5
1 3 8 14 19 20
Output
3
Input
6 1
1 3 5 7 9 10
Output
2
Note
The first sample is already explained in the problem statement.
For the second sample, after typing the first word at the second 1, it disappears because the next word is typed at the second 3 and 3 - 1 > 1. Similarly, only 1 word will remain at the second 9. Then, a word is typed at the second 10, so there will be two words on the screen, as the old word won't disappear because 10 - 9 ≤ 1.
Tags: implementation
Correct Solution:
```
n,c=map(int,input().split())
s=list(map(int,input().split()))
ans=1
for i in range(1,n):
if s[i]-s[i-1]>c:
ans=1
else:
ans+=1
print(ans)
```
| 96,634
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
ZS the Coder is coding on a crazy computer. If you don't type in a word for a c consecutive seconds, everything you typed disappear!
More formally, if you typed a word at second a and then the next word at second b, then if b - a ≤ c, just the new word is appended to other words on the screen. If b - a > c, then everything on the screen disappears and after that the word you have typed appears on the screen.
For example, if c = 5 and you typed words at seconds 1, 3, 8, 14, 19, 20 then at the second 8 there will be 3 words on the screen. After that, everything disappears at the second 13 because nothing was typed. At the seconds 14 and 19 another two words are typed, and finally, at the second 20, one more word is typed, and a total of 3 words remain on the screen.
You're given the times when ZS the Coder typed the words. Determine how many words remain on the screen after he finished typing everything.
Input
The first line contains two integers n and c (1 ≤ n ≤ 100 000, 1 ≤ c ≤ 109) — the number of words ZS the Coder typed and the crazy computer delay respectively.
The next line contains n integers t1, t2, ..., tn (1 ≤ t1 < t2 < ... < tn ≤ 109), where ti denotes the second when ZS the Coder typed the i-th word.
Output
Print a single positive integer, the number of words that remain on the screen after all n words was typed, in other words, at the second tn.
Examples
Input
6 5
1 3 8 14 19 20
Output
3
Input
6 1
1 3 5 7 9 10
Output
2
Note
The first sample is already explained in the problem statement.
For the second sample, after typing the first word at the second 1, it disappears because the next word is typed at the second 3 and 3 - 1 > 1. Similarly, only 1 word will remain at the second 9. Then, a word is typed at the second 10, so there will be two words on the screen, as the old word won't disappear because 10 - 9 ≤ 1.
Tags: implementation
Correct Solution:
```
n,c = [int(x) for x in input().split()]
t = list(map(int,input().split()))
l = [t[0]]
for i in range(1,n):
if t[i]-t[i-1]<=c:
l.append(t[i])
else:
l.clear()
l.append(t[i])
print(len(l))
```
| 96,635
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
ZS the Coder is coding on a crazy computer. If you don't type in a word for a c consecutive seconds, everything you typed disappear!
More formally, if you typed a word at second a and then the next word at second b, then if b - a ≤ c, just the new word is appended to other words on the screen. If b - a > c, then everything on the screen disappears and after that the word you have typed appears on the screen.
For example, if c = 5 and you typed words at seconds 1, 3, 8, 14, 19, 20 then at the second 8 there will be 3 words on the screen. After that, everything disappears at the second 13 because nothing was typed. At the seconds 14 and 19 another two words are typed, and finally, at the second 20, one more word is typed, and a total of 3 words remain on the screen.
You're given the times when ZS the Coder typed the words. Determine how many words remain on the screen after he finished typing everything.
Input
The first line contains two integers n and c (1 ≤ n ≤ 100 000, 1 ≤ c ≤ 109) — the number of words ZS the Coder typed and the crazy computer delay respectively.
The next line contains n integers t1, t2, ..., tn (1 ≤ t1 < t2 < ... < tn ≤ 109), where ti denotes the second when ZS the Coder typed the i-th word.
Output
Print a single positive integer, the number of words that remain on the screen after all n words was typed, in other words, at the second tn.
Examples
Input
6 5
1 3 8 14 19 20
Output
3
Input
6 1
1 3 5 7 9 10
Output
2
Note
The first sample is already explained in the problem statement.
For the second sample, after typing the first word at the second 1, it disappears because the next word is typed at the second 3 and 3 - 1 > 1. Similarly, only 1 word will remain at the second 9. Then, a word is typed at the second 10, so there will be two words on the screen, as the old word won't disappear because 10 - 9 ≤ 1.
Tags: implementation
Correct Solution:
```
n, c = map(int, input().split(" "))
t = list(map(int, input().split(" ")))
words = 1
for i in range(1, n):
if t[i] - t[i - 1] <= c:
words += 1
else:
words = 1
print(words)
```
| 96,636
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
ZS the Coder is coding on a crazy computer. If you don't type in a word for a c consecutive seconds, everything you typed disappear!
More formally, if you typed a word at second a and then the next word at second b, then if b - a ≤ c, just the new word is appended to other words on the screen. If b - a > c, then everything on the screen disappears and after that the word you have typed appears on the screen.
For example, if c = 5 and you typed words at seconds 1, 3, 8, 14, 19, 20 then at the second 8 there will be 3 words on the screen. After that, everything disappears at the second 13 because nothing was typed. At the seconds 14 and 19 another two words are typed, and finally, at the second 20, one more word is typed, and a total of 3 words remain on the screen.
You're given the times when ZS the Coder typed the words. Determine how many words remain on the screen after he finished typing everything.
Input
The first line contains two integers n and c (1 ≤ n ≤ 100 000, 1 ≤ c ≤ 109) — the number of words ZS the Coder typed and the crazy computer delay respectively.
The next line contains n integers t1, t2, ..., tn (1 ≤ t1 < t2 < ... < tn ≤ 109), where ti denotes the second when ZS the Coder typed the i-th word.
Output
Print a single positive integer, the number of words that remain on the screen after all n words was typed, in other words, at the second tn.
Examples
Input
6 5
1 3 8 14 19 20
Output
3
Input
6 1
1 3 5 7 9 10
Output
2
Note
The first sample is already explained in the problem statement.
For the second sample, after typing the first word at the second 1, it disappears because the next word is typed at the second 3 and 3 - 1 > 1. Similarly, only 1 word will remain at the second 9. Then, a word is typed at the second 10, so there will be two words on the screen, as the old word won't disappear because 10 - 9 ≤ 1.
Tags: implementation
Correct Solution:
```
n , c = map(int , input().split())
x = [int(x) for x in input().split()]
cnt = 0
for i in range(len(x) - 1):
if x[i + 1] - x[i] <= c:
cnt += 1
else:
cnt = 0
print(cnt + 1)
```
| 96,637
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
ZS the Coder is coding on a crazy computer. If you don't type in a word for a c consecutive seconds, everything you typed disappear!
More formally, if you typed a word at second a and then the next word at second b, then if b - a ≤ c, just the new word is appended to other words on the screen. If b - a > c, then everything on the screen disappears and after that the word you have typed appears on the screen.
For example, if c = 5 and you typed words at seconds 1, 3, 8, 14, 19, 20 then at the second 8 there will be 3 words on the screen. After that, everything disappears at the second 13 because nothing was typed. At the seconds 14 and 19 another two words are typed, and finally, at the second 20, one more word is typed, and a total of 3 words remain on the screen.
You're given the times when ZS the Coder typed the words. Determine how many words remain on the screen after he finished typing everything.
Input
The first line contains two integers n and c (1 ≤ n ≤ 100 000, 1 ≤ c ≤ 109) — the number of words ZS the Coder typed and the crazy computer delay respectively.
The next line contains n integers t1, t2, ..., tn (1 ≤ t1 < t2 < ... < tn ≤ 109), where ti denotes the second when ZS the Coder typed the i-th word.
Output
Print a single positive integer, the number of words that remain on the screen after all n words was typed, in other words, at the second tn.
Examples
Input
6 5
1 3 8 14 19 20
Output
3
Input
6 1
1 3 5 7 9 10
Output
2
Note
The first sample is already explained in the problem statement.
For the second sample, after typing the first word at the second 1, it disappears because the next word is typed at the second 3 and 3 - 1 > 1. Similarly, only 1 word will remain at the second 9. Then, a word is typed at the second 10, so there will be two words on the screen, as the old word won't disappear because 10 - 9 ≤ 1.
Tags: implementation
Correct Solution:
```
n, c = map(int, input().split())
l = list(map(int, input().split()))
ans = 1
for i in range(1, n):
if l[i] - l[i - 1] <= c:
ans += 1
else:
ans = 1
print(ans)
```
| 96,638
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|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
ZS the Coder is coding on a crazy computer. If you don't type in a word for a c consecutive seconds, everything you typed disappear!
More formally, if you typed a word at second a and then the next word at second b, then if b - a ≤ c, just the new word is appended to other words on the screen. If b - a > c, then everything on the screen disappears and after that the word you have typed appears on the screen.
For example, if c = 5 and you typed words at seconds 1, 3, 8, 14, 19, 20 then at the second 8 there will be 3 words on the screen. After that, everything disappears at the second 13 because nothing was typed. At the seconds 14 and 19 another two words are typed, and finally, at the second 20, one more word is typed, and a total of 3 words remain on the screen.
You're given the times when ZS the Coder typed the words. Determine how many words remain on the screen after he finished typing everything.
Input
The first line contains two integers n and c (1 ≤ n ≤ 100 000, 1 ≤ c ≤ 109) — the number of words ZS the Coder typed and the crazy computer delay respectively.
The next line contains n integers t1, t2, ..., tn (1 ≤ t1 < t2 < ... < tn ≤ 109), where ti denotes the second when ZS the Coder typed the i-th word.
Output
Print a single positive integer, the number of words that remain on the screen after all n words was typed, in other words, at the second tn.
Examples
Input
6 5
1 3 8 14 19 20
Output
3
Input
6 1
1 3 5 7 9 10
Output
2
Note
The first sample is already explained in the problem statement.
For the second sample, after typing the first word at the second 1, it disappears because the next word is typed at the second 3 and 3 - 1 > 1. Similarly, only 1 word will remain at the second 9. Then, a word is typed at the second 10, so there will be two words on the screen, as the old word won't disappear because 10 - 9 ≤ 1.
Submitted Solution:
```
n,c=map(int,input().split())
sum=1
words=list(map(int,input().split()))
for k in range(1,n):
if words[k]-words[k-1]<=c:
sum+=1
else:
sum=1
print(sum)
```
Yes
| 96,639
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|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
ZS the Coder is coding on a crazy computer. If you don't type in a word for a c consecutive seconds, everything you typed disappear!
More formally, if you typed a word at second a and then the next word at second b, then if b - a ≤ c, just the new word is appended to other words on the screen. If b - a > c, then everything on the screen disappears and after that the word you have typed appears on the screen.
For example, if c = 5 and you typed words at seconds 1, 3, 8, 14, 19, 20 then at the second 8 there will be 3 words on the screen. After that, everything disappears at the second 13 because nothing was typed. At the seconds 14 and 19 another two words are typed, and finally, at the second 20, one more word is typed, and a total of 3 words remain on the screen.
You're given the times when ZS the Coder typed the words. Determine how many words remain on the screen after he finished typing everything.
Input
The first line contains two integers n and c (1 ≤ n ≤ 100 000, 1 ≤ c ≤ 109) — the number of words ZS the Coder typed and the crazy computer delay respectively.
The next line contains n integers t1, t2, ..., tn (1 ≤ t1 < t2 < ... < tn ≤ 109), where ti denotes the second when ZS the Coder typed the i-th word.
Output
Print a single positive integer, the number of words that remain on the screen after all n words was typed, in other words, at the second tn.
Examples
Input
6 5
1 3 8 14 19 20
Output
3
Input
6 1
1 3 5 7 9 10
Output
2
Note
The first sample is already explained in the problem statement.
For the second sample, after typing the first word at the second 1, it disappears because the next word is typed at the second 3 and 3 - 1 > 1. Similarly, only 1 word will remain at the second 9. Then, a word is typed at the second 10, so there will be two words on the screen, as the old word won't disappear because 10 - 9 ≤ 1.
Submitted Solution:
```
import sys
n,c = map(int,input().split())
arr = list(map(int,input().split()))
cnt = 1
for i in range(n-1,-1,-1):
if i > 0 and arr[i] - arr[i-1] > c:
break
elif i > 0 and arr[i] - arr[i-1] <= c:
cnt += 1
print(cnt)
```
Yes
| 96,640
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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.
ZS the Coder is coding on a crazy computer. If you don't type in a word for a c consecutive seconds, everything you typed disappear!
More formally, if you typed a word at second a and then the next word at second b, then if b - a ≤ c, just the new word is appended to other words on the screen. If b - a > c, then everything on the screen disappears and after that the word you have typed appears on the screen.
For example, if c = 5 and you typed words at seconds 1, 3, 8, 14, 19, 20 then at the second 8 there will be 3 words on the screen. After that, everything disappears at the second 13 because nothing was typed. At the seconds 14 and 19 another two words are typed, and finally, at the second 20, one more word is typed, and a total of 3 words remain on the screen.
You're given the times when ZS the Coder typed the words. Determine how many words remain on the screen after he finished typing everything.
Input
The first line contains two integers n and c (1 ≤ n ≤ 100 000, 1 ≤ c ≤ 109) — the number of words ZS the Coder typed and the crazy computer delay respectively.
The next line contains n integers t1, t2, ..., tn (1 ≤ t1 < t2 < ... < tn ≤ 109), where ti denotes the second when ZS the Coder typed the i-th word.
Output
Print a single positive integer, the number of words that remain on the screen after all n words was typed, in other words, at the second tn.
Examples
Input
6 5
1 3 8 14 19 20
Output
3
Input
6 1
1 3 5 7 9 10
Output
2
Note
The first sample is already explained in the problem statement.
For the second sample, after typing the first word at the second 1, it disappears because the next word is typed at the second 3 and 3 - 1 > 1. Similarly, only 1 word will remain at the second 9. Then, a word is typed at the second 10, so there will be two words on the screen, as the old word won't disappear because 10 - 9 ≤ 1.
Submitted Solution:
```
# ✪ H4WK3yE乡
# Mayank Chaudhary
# I can :)
# ABES EC , Ghaziabad
# ///==========Libraries, Constants and Functions=============///
import sys
from bisect import bisect_left,bisect_right,insort
from collections import deque,Counter
from math import gcd,sqrt,factorial,ceil,log10
from itertools import permutations
from heapq import heappush,heappop,heapify
inf = float("inf")
mod = 1000000007
mini=1000000007
def max_subarray(array): # <------- Extended Kadane's algo which gives maximum sum sub-array but also the starting and ending indexes
max_so_far = max_ending_here = array[0]
start_index = 0
end_index = 0
for i in range(1, len(array) -1):
temp_start_index = temp_end_index = None
if array[i] > (max_ending_here + array[i]):
temp_start_index = temp_end_index = i
max_ending_here = array[i]
else:
temp_end_index = i
max_ending_here = max_ending_here + array[i]
if max_so_far < max_ending_here:
max_so_far = max_ending_here
if temp_start_index != None:
start_index = temp_start_index
end_index = i
print(max_so_far, start_index, end_index)
def ncr(n,r): # < ------ To calculate nCr mod p value using Fermat Little under modulo m
d=10**9+7
num=fact(n)
den=(fact(r)*fact(n-r))%d
den=pow(den,d-2,d)
return (num*den)%d
def sieve(n): # <----- sieve of eratosthenes for prime no.
prime=[True for i in range(n+1)]
lst=[]
p=2
while p*p<=n:
if prime[p]:
for i in range(p*p,n+1,p):
prime[i]=False
p=p+1
for i in range(2,n+1):
if prime[i]:
lst.append(i)
return lst
def binary(number): # <----- calculate the no. of 1's in binary representation of number
result=0
while number:
result=result+1
number=number&(number-1)
return result
def calculate_factors(n): #<---- most efficient method to calculate no. of factors of number
hh = [1] * (n + 1);
p = 2;
while((p * p) < n):
if (hh[p] == 1):
for i in range((p * 2), n, p):
hh[i] = 0;
p += 1;
total = 1;
for p in range(2, n + 1):
if (hh[p] == 1):
count = 0;
if (n % p == 0):
while (n % p == 0):
n = int(n / p);
count += 1;
total *= (count + 1);
return total;
def prime_factors(n): #<------------ to find prime factors of a no.
i = 2
factors = set()
while i * i <= n:
if n % i:
i += 1
else:
factors.add(n//i)
n=n//i
factors.add(i)
if n > 1:
factors.add(n)
return (factors)
def isPrime(n): #<-----------check whether a no. is prime or not
if n==2 or n==3: return True
if n%2==0 or n<2: return False
for i in range(3,int(n**0.5)+1,2): # only odd numbers
if n%i==0:
return False
return True
def solve(n):
if n==1:
return (1)
p=2;result=[]
while (p*p)<=n:
if n%p==0:
result.append(p);result.append(n//p)
p=p+1
return result
def atMostSum(arr, n, k):
_sum = 0
cnt = 0
maxcnt = 0
for i in range(n):
# If adding current element doesn't
# Cross limit add it to current window
if ((_sum + arr[i]) <= k):
_sum += arr[i]
cnt += 1
# Else, remove first element of current
# window and add the current element
elif(sum != 0):
_sum = _sum - arr[i - cnt] + arr[i]
# keep track of max length.
maxcnt = max(cnt, maxcnt)
return maxcnt
def get_array(): return list(map(int, sys.stdin.readline().strip().split()))
def get_ints(): return map(int, sys.stdin.readline().strip().split())
def input(): return sys.stdin.readline().strip()
# ///==========MAIN=============///
n,c=get_ints()
count=1
Arr=get_array()
for i in range(1,n):
if Arr[i]-Arr[i-1]<=c:
count+=1
else:
count=1
print(count)
```
Yes
| 96,641
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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.
ZS the Coder is coding on a crazy computer. If you don't type in a word for a c consecutive seconds, everything you typed disappear!
More formally, if you typed a word at second a and then the next word at second b, then if b - a ≤ c, just the new word is appended to other words on the screen. If b - a > c, then everything on the screen disappears and after that the word you have typed appears on the screen.
For example, if c = 5 and you typed words at seconds 1, 3, 8, 14, 19, 20 then at the second 8 there will be 3 words on the screen. After that, everything disappears at the second 13 because nothing was typed. At the seconds 14 and 19 another two words are typed, and finally, at the second 20, one more word is typed, and a total of 3 words remain on the screen.
You're given the times when ZS the Coder typed the words. Determine how many words remain on the screen after he finished typing everything.
Input
The first line contains two integers n and c (1 ≤ n ≤ 100 000, 1 ≤ c ≤ 109) — the number of words ZS the Coder typed and the crazy computer delay respectively.
The next line contains n integers t1, t2, ..., tn (1 ≤ t1 < t2 < ... < tn ≤ 109), where ti denotes the second when ZS the Coder typed the i-th word.
Output
Print a single positive integer, the number of words that remain on the screen after all n words was typed, in other words, at the second tn.
Examples
Input
6 5
1 3 8 14 19 20
Output
3
Input
6 1
1 3 5 7 9 10
Output
2
Note
The first sample is already explained in the problem statement.
For the second sample, after typing the first word at the second 1, it disappears because the next word is typed at the second 3 and 3 - 1 > 1. Similarly, only 1 word will remain at the second 9. Then, a word is typed at the second 10, so there will be two words on the screen, as the old word won't disappear because 10 - 9 ≤ 1.
Submitted Solution:
```
n, c = map(int, input().split())
t = list(map(int, input().split()))
time = 0
number_of_words = 0
for action in t:
if action - time > c:
number_of_words = 1
else:
number_of_words += 1
time = action
print(number_of_words)
```
Yes
| 96,642
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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.
ZS the Coder is coding on a crazy computer. If you don't type in a word for a c consecutive seconds, everything you typed disappear!
More formally, if you typed a word at second a and then the next word at second b, then if b - a ≤ c, just the new word is appended to other words on the screen. If b - a > c, then everything on the screen disappears and after that the word you have typed appears on the screen.
For example, if c = 5 and you typed words at seconds 1, 3, 8, 14, 19, 20 then at the second 8 there will be 3 words on the screen. After that, everything disappears at the second 13 because nothing was typed. At the seconds 14 and 19 another two words are typed, and finally, at the second 20, one more word is typed, and a total of 3 words remain on the screen.
You're given the times when ZS the Coder typed the words. Determine how many words remain on the screen after he finished typing everything.
Input
The first line contains two integers n and c (1 ≤ n ≤ 100 000, 1 ≤ c ≤ 109) — the number of words ZS the Coder typed and the crazy computer delay respectively.
The next line contains n integers t1, t2, ..., tn (1 ≤ t1 < t2 < ... < tn ≤ 109), where ti denotes the second when ZS the Coder typed the i-th word.
Output
Print a single positive integer, the number of words that remain on the screen after all n words was typed, in other words, at the second tn.
Examples
Input
6 5
1 3 8 14 19 20
Output
3
Input
6 1
1 3 5 7 9 10
Output
2
Note
The first sample is already explained in the problem statement.
For the second sample, after typing the first word at the second 1, it disappears because the next word is typed at the second 3 and 3 - 1 > 1. Similarly, only 1 word will remain at the second 9. Then, a word is typed at the second 10, so there will be two words on the screen, as the old word won't disappear because 10 - 9 ≤ 1.
Submitted Solution:
```
n , c = map(int, input().split())
a = list(map(int,input().split()))
ans , it1, tmp = 1, 0, 1
for it2 in range(1, n):
if a[it2]-a[it1] > c :
ans = max(ans, tmp)
tmp = 1
it1 , tmp = it1+1, tmp+1
print(ans)
```
No
| 96,643
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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.
ZS the Coder is coding on a crazy computer. If you don't type in a word for a c consecutive seconds, everything you typed disappear!
More formally, if you typed a word at second a and then the next word at second b, then if b - a ≤ c, just the new word is appended to other words on the screen. If b - a > c, then everything on the screen disappears and after that the word you have typed appears on the screen.
For example, if c = 5 and you typed words at seconds 1, 3, 8, 14, 19, 20 then at the second 8 there will be 3 words on the screen. After that, everything disappears at the second 13 because nothing was typed. At the seconds 14 and 19 another two words are typed, and finally, at the second 20, one more word is typed, and a total of 3 words remain on the screen.
You're given the times when ZS the Coder typed the words. Determine how many words remain on the screen after he finished typing everything.
Input
The first line contains two integers n and c (1 ≤ n ≤ 100 000, 1 ≤ c ≤ 109) — the number of words ZS the Coder typed and the crazy computer delay respectively.
The next line contains n integers t1, t2, ..., tn (1 ≤ t1 < t2 < ... < tn ≤ 109), where ti denotes the second when ZS the Coder typed the i-th word.
Output
Print a single positive integer, the number of words that remain on the screen after all n words was typed, in other words, at the second tn.
Examples
Input
6 5
1 3 8 14 19 20
Output
3
Input
6 1
1 3 5 7 9 10
Output
2
Note
The first sample is already explained in the problem statement.
For the second sample, after typing the first word at the second 1, it disappears because the next word is typed at the second 3 and 3 - 1 > 1. Similarly, only 1 word will remain at the second 9. Then, a word is typed at the second 10, so there will be two words on the screen, as the old word won't disappear because 10 - 9 ≤ 1.
Submitted Solution:
```
n, c =[int(i) for i in input().split()]
t = [int(i) for i in input().split()]
ans = 0
for i in range(c):
if t[i] - t[i-1] <= c:
ans += 2
else:
ans = 1
print(ans)
```
No
| 96,644
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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.
ZS the Coder is coding on a crazy computer. If you don't type in a word for a c consecutive seconds, everything you typed disappear!
More formally, if you typed a word at second a and then the next word at second b, then if b - a ≤ c, just the new word is appended to other words on the screen. If b - a > c, then everything on the screen disappears and after that the word you have typed appears on the screen.
For example, if c = 5 and you typed words at seconds 1, 3, 8, 14, 19, 20 then at the second 8 there will be 3 words on the screen. After that, everything disappears at the second 13 because nothing was typed. At the seconds 14 and 19 another two words are typed, and finally, at the second 20, one more word is typed, and a total of 3 words remain on the screen.
You're given the times when ZS the Coder typed the words. Determine how many words remain on the screen after he finished typing everything.
Input
The first line contains two integers n and c (1 ≤ n ≤ 100 000, 1 ≤ c ≤ 109) — the number of words ZS the Coder typed and the crazy computer delay respectively.
The next line contains n integers t1, t2, ..., tn (1 ≤ t1 < t2 < ... < tn ≤ 109), where ti denotes the second when ZS the Coder typed the i-th word.
Output
Print a single positive integer, the number of words that remain on the screen after all n words was typed, in other words, at the second tn.
Examples
Input
6 5
1 3 8 14 19 20
Output
3
Input
6 1
1 3 5 7 9 10
Output
2
Note
The first sample is already explained in the problem statement.
For the second sample, after typing the first word at the second 1, it disappears because the next word is typed at the second 3 and 3 - 1 > 1. Similarly, only 1 word will remain at the second 9. Then, a word is typed at the second 10, so there will be two words on the screen, as the old word won't disappear because 10 - 9 ≤ 1.
Submitted Solution:
```
a,b=map(int,input().split())
x=list(map(int,input().split()))
count=1;
for i in range (a):
if (x[i]-x[i-1])<= b:
count=count+1
else:
count=1
print(count)
```
No
| 96,645
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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.
ZS the Coder is coding on a crazy computer. If you don't type in a word for a c consecutive seconds, everything you typed disappear!
More formally, if you typed a word at second a and then the next word at second b, then if b - a ≤ c, just the new word is appended to other words on the screen. If b - a > c, then everything on the screen disappears and after that the word you have typed appears on the screen.
For example, if c = 5 and you typed words at seconds 1, 3, 8, 14, 19, 20 then at the second 8 there will be 3 words on the screen. After that, everything disappears at the second 13 because nothing was typed. At the seconds 14 and 19 another two words are typed, and finally, at the second 20, one more word is typed, and a total of 3 words remain on the screen.
You're given the times when ZS the Coder typed the words. Determine how many words remain on the screen after he finished typing everything.
Input
The first line contains two integers n and c (1 ≤ n ≤ 100 000, 1 ≤ c ≤ 109) — the number of words ZS the Coder typed and the crazy computer delay respectively.
The next line contains n integers t1, t2, ..., tn (1 ≤ t1 < t2 < ... < tn ≤ 109), where ti denotes the second when ZS the Coder typed the i-th word.
Output
Print a single positive integer, the number of words that remain on the screen after all n words was typed, in other words, at the second tn.
Examples
Input
6 5
1 3 8 14 19 20
Output
3
Input
6 1
1 3 5 7 9 10
Output
2
Note
The first sample is already explained in the problem statement.
For the second sample, after typing the first word at the second 1, it disappears because the next word is typed at the second 3 and 3 - 1 > 1. Similarly, only 1 word will remain at the second 9. Then, a word is typed at the second 10, so there will be two words on the screen, as the old word won't disappear because 10 - 9 ≤ 1.
Submitted Solution:
```
n,m = map(int,input().split())
a = [int(s) for s in input().split()]
count = 0
for i in range(n - 1):
if abs(a[i] - a[i + 1]) > m :
count = 1
else:
count += 1
print(count)
```
No
| 96,646
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Petya has a string of length n consisting of small and large English letters and digits.
He performs m operations. Each operation is described with two integers l and r and a character c: Petya removes from the string all characters c on positions between l and r, inclusive. It's obvious that the length of the string remains the same or decreases after each operation.
Find how the string will look like after Petya performs all m operations.
Input
The first string contains two integers n and m (1 ≤ n, m ≤ 2·105) — the length of the string and the number of operations.
The second line contains the string of length n, consisting of small and large English letters and digits. Positions in the string are enumerated from 1.
Each of the next m lines contains two integers l and r (1 ≤ l ≤ r), followed by a character c, which is a small or large English letter or a digit. This line describes one operation. It is guaranteed that r doesn't exceed the length of the string s before current operation.
Output
Print the string Petya will obtain after performing all m operations. If the strings becomes empty after all operations, print an empty line.
Examples
Input
4 2
abac
1 3 a
2 2 c
Output
b
Input
3 2
A0z
1 3 0
1 1 z
Output
Az
Input
10 4
agtFrgF4aF
2 5 g
4 9 F
1 5 4
1 7 a
Output
tFrg4
Input
9 5
aAAaBBccD
1 4 a
5 6 c
2 3 B
4 4 D
2 3 A
Output
AB
Note
In the first example during the first operation both letters 'a' are removed, so the string becomes "bc". During the second operation the letter 'c' (on the second position) is removed, and the string becomes "b".
In the second example during the first operation Petya removes '0' from the second position. After that the string becomes "Az". During the second operations the string doesn't change.
Tags: data structures, strings
Correct Solution:
```
#!/usr/bin/env python
import os
import sys
from io import BytesIO, IOBase
class FenwickTree:
def __init__(self, x):
"""transform list into BIT"""
self.bit = x
for i in range(len(x)):
j = i | (i + 1)
if j < len(x):
x[j] += x[i]
def update(self, idx, x):
"""updates bit[idx] += x"""
while idx < len(self.bit):
self.bit[idx] += x
idx |= idx + 1
def query(self, end):
"""calc sum(bit[:end])"""
x = 0
while end:
x += self.bit[end - 1]
end &= end - 1
return x
def findkth(self, k):
"""Find largest idx such that sum(bit[:idx]) <= k"""
idx = -1
for d in reversed(range(len(self.bit).bit_length())):
right_idx = idx + (1 << d)
if right_idx < len(self.bit) and k >= self.bit[right_idx]:
idx = right_idx
k -= self.bit[idx]
return idx + 1
def lb(a,x):
l,r=-1,len(a)
while(r-l>1):
m=(l+r)//2
if(a[m]<x):
l=m
else:
r=m
return r
def main():
n,m=map(int,input().split())
# print (n,m)
s=input()
a = [ [] for _ in range(256)]
b = FenwickTree([1]*len(s))
for i,x in enumerate(s):
a[ord(x)].append(i+1)
# print(s)
# print(a)
for _ in range(m):
l,r,c=input().split()
l,r=map(int,[l,r])
# print("k",l,b.findkth(l-1))
l,r=b.findkth(l),b.findkth(r)
# print(l,r,c)
c=ord(c)
l=lb(a[c],l)
r=lb(a[c],r+1)
for j in range(l,r):
# print("rm",a[c][j])
b.update(a[c][j],-1)
n-=1
a[c] = a[c][:l]+a[c][r:]
b = [ x for x in map(b.findkth,range(1,n+1))]
# print(b)
print("".join(s[x-1] for x in b))
# region fastio
BUFSIZE = 8192
class FastIO(IOBase):
newlines = 0
def __init__(self, file):
self._fd = file.fileno()
self.buffer = BytesIO()
self.writable = "x" in file.mode or "r" not in file.mode
self.write = self.buffer.write if self.writable else None
def read(self):
while True:
b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
if not b:
break
ptr = self.buffer.tell()
self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
self.newlines = 0
return self.buffer.read()
def readline(self):
while self.newlines == 0:
b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
self.newlines = b.count(b"\n") + (not b)
ptr = self.buffer.tell()
self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
self.newlines -= 1
return self.buffer.readline()
def flush(self):
if self.writable:
os.write(self._fd, self.buffer.getvalue())
self.buffer.truncate(0), self.buffer.seek(0)
class IOWrapper(IOBase):
def __init__(self, file):
self.buffer = FastIO(file)
self.flush = self.buffer.flush
self.writable = self.buffer.writable
self.write = lambda s: self.buffer.write(s.encode("ascii"))
self.read = lambda: self.buffer.read().decode("ascii")
self.readline = lambda: self.buffer.readline().decode("ascii")
sys.stdin, sys.stdout = IOWrapper(sys.stdin), IOWrapper(sys.stdout)
input = lambda: sys.stdin.readline().rstrip("\r\n")
# endregion
if __name__ == "__main__":
main()
```
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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.
Petya has a string of length n consisting of small and large English letters and digits.
He performs m operations. Each operation is described with two integers l and r and a character c: Petya removes from the string all characters c on positions between l and r, inclusive. It's obvious that the length of the string remains the same or decreases after each operation.
Find how the string will look like after Petya performs all m operations.
Input
The first string contains two integers n and m (1 ≤ n, m ≤ 2·105) — the length of the string and the number of operations.
The second line contains the string of length n, consisting of small and large English letters and digits. Positions in the string are enumerated from 1.
Each of the next m lines contains two integers l and r (1 ≤ l ≤ r), followed by a character c, which is a small or large English letter or a digit. This line describes one operation. It is guaranteed that r doesn't exceed the length of the string s before current operation.
Output
Print the string Petya will obtain after performing all m operations. If the strings becomes empty after all operations, print an empty line.
Examples
Input
4 2
abac
1 3 a
2 2 c
Output
b
Input
3 2
A0z
1 3 0
1 1 z
Output
Az
Input
10 4
agtFrgF4aF
2 5 g
4 9 F
1 5 4
1 7 a
Output
tFrg4
Input
9 5
aAAaBBccD
1 4 a
5 6 c
2 3 B
4 4 D
2 3 A
Output
AB
Note
In the first example during the first operation both letters 'a' are removed, so the string becomes "bc". During the second operation the letter 'c' (on the second position) is removed, and the string becomes "b".
In the second example during the first operation Petya removes '0' from the second position. After that the string becomes "Az". During the second operations the string doesn't change.
Submitted Solution:
```
nm=input().split()
lnm=list(map(int,nm))
n=lnm[0]
m=lnm[1]
strin = list(input())
for i in range(m):
fn = input().split()
l=int(fn[0])-1
r=int(fn[1])
c=fn[2]
copy=strin[l:r]
while c in copy:
copy.remove(c)
if r < len(strin) and l >0:
strin=strin[:l]+copy+strin[l+len(copy)+1:]
elif r==len(strin) and l>0:
strin=strin[:l]+copy
elif r<len(strin) and l == 0:
strin = copy +strin[l+len(copy)+1:]
else:
strin=copy
print(''.join(strin))
```
No
| 96,691
|
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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.
Petya has a string of length n consisting of small and large English letters and digits.
He performs m operations. Each operation is described with two integers l and r and a character c: Petya removes from the string all characters c on positions between l and r, inclusive. It's obvious that the length of the string remains the same or decreases after each operation.
Find how the string will look like after Petya performs all m operations.
Input
The first string contains two integers n and m (1 ≤ n, m ≤ 2·105) — the length of the string and the number of operations.
The second line contains the string of length n, consisting of small and large English letters and digits. Positions in the string are enumerated from 1.
Each of the next m lines contains two integers l and r (1 ≤ l ≤ r), followed by a character c, which is a small or large English letter or a digit. This line describes one operation. It is guaranteed that r doesn't exceed the length of the string s before current operation.
Output
Print the string Petya will obtain after performing all m operations. If the strings becomes empty after all operations, print an empty line.
Examples
Input
4 2
abac
1 3 a
2 2 c
Output
b
Input
3 2
A0z
1 3 0
1 1 z
Output
Az
Input
10 4
agtFrgF4aF
2 5 g
4 9 F
1 5 4
1 7 a
Output
tFrg4
Input
9 5
aAAaBBccD
1 4 a
5 6 c
2 3 B
4 4 D
2 3 A
Output
AB
Note
In the first example during the first operation both letters 'a' are removed, so the string becomes "bc". During the second operation the letter 'c' (on the second position) is removed, and the string becomes "b".
In the second example during the first operation Petya removes '0' from the second position. After that the string becomes "Az". During the second operations the string doesn't change.
Submitted Solution:
```
def pro(s, oper):
k = oper.split()
x = int(k[0])
y = int(k[1])
ss = k[2]
s2 = list(s)
if x == 1:
if y == n:
while (ss in s2)==True:
s2.remove(ss)
return ''.join(s2)
else:
s21 = s2[:y]
s22 = s2[y:]
while (ss in s21)==True:
s21.remove(ss)
return ''.join(s21+s22)
else:
if y == n:
s21 = s2[x-1:]
s22 = s2[:x-1]
while (ss in s21)==True:
s21.remove(ss)
return ''.join(s21+s22)
else:
s21 = s2[x-1:y]
s22 = s2[:x-1]
s23 = s2[y:]
while (ss in s21)==True:
s21.remove(ss)
return ''.join(s22+s21+s23)
s = input()
k = list(map(int, s.split()))
n = k[0]
m = k[1]
origin = input()
list1 = []
for i in range(0, m):
list1.append(input())
for i in list1:
origin = pro(origin, i)
if len(origin) == 0:
print()
else:
print(origin)
```
No
| 96,692
|
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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.
Petya has a string of length n consisting of small and large English letters and digits.
He performs m operations. Each operation is described with two integers l and r and a character c: Petya removes from the string all characters c on positions between l and r, inclusive. It's obvious that the length of the string remains the same or decreases after each operation.
Find how the string will look like after Petya performs all m operations.
Input
The first string contains two integers n and m (1 ≤ n, m ≤ 2·105) — the length of the string and the number of operations.
The second line contains the string of length n, consisting of small and large English letters and digits. Positions in the string are enumerated from 1.
Each of the next m lines contains two integers l and r (1 ≤ l ≤ r), followed by a character c, which is a small or large English letter or a digit. This line describes one operation. It is guaranteed that r doesn't exceed the length of the string s before current operation.
Output
Print the string Petya will obtain after performing all m operations. If the strings becomes empty after all operations, print an empty line.
Examples
Input
4 2
abac
1 3 a
2 2 c
Output
b
Input
3 2
A0z
1 3 0
1 1 z
Output
Az
Input
10 4
agtFrgF4aF
2 5 g
4 9 F
1 5 4
1 7 a
Output
tFrg4
Input
9 5
aAAaBBccD
1 4 a
5 6 c
2 3 B
4 4 D
2 3 A
Output
AB
Note
In the first example during the first operation both letters 'a' are removed, so the string becomes "bc". During the second operation the letter 'c' (on the second position) is removed, and the string becomes "b".
In the second example during the first operation Petya removes '0' from the second position. After that the string becomes "Az". During the second operations the string doesn't change.
Submitted Solution:
```
nm=input().split()
lnm=list(map(int,nm))
n=lnm[0]
m=lnm[1]
strin = list(input())
for i in range(m):
fn = input().split()
l=int(fn[0])-1
r=int(fn[1])
c=fn[2]
while c in strin[l:r]:
strin.remove(c)
print(''.join(strin))
```
No
| 96,693
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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.
Petya has a string of length n consisting of small and large English letters and digits.
He performs m operations. Each operation is described with two integers l and r and a character c: Petya removes from the string all characters c on positions between l and r, inclusive. It's obvious that the length of the string remains the same or decreases after each operation.
Find how the string will look like after Petya performs all m operations.
Input
The first string contains two integers n and m (1 ≤ n, m ≤ 2·105) — the length of the string and the number of operations.
The second line contains the string of length n, consisting of small and large English letters and digits. Positions in the string are enumerated from 1.
Each of the next m lines contains two integers l and r (1 ≤ l ≤ r), followed by a character c, which is a small or large English letter or a digit. This line describes one operation. It is guaranteed that r doesn't exceed the length of the string s before current operation.
Output
Print the string Petya will obtain after performing all m operations. If the strings becomes empty after all operations, print an empty line.
Examples
Input
4 2
abac
1 3 a
2 2 c
Output
b
Input
3 2
A0z
1 3 0
1 1 z
Output
Az
Input
10 4
agtFrgF4aF
2 5 g
4 9 F
1 5 4
1 7 a
Output
tFrg4
Input
9 5
aAAaBBccD
1 4 a
5 6 c
2 3 B
4 4 D
2 3 A
Output
AB
Note
In the first example during the first operation both letters 'a' are removed, so the string becomes "bc". During the second operation the letter 'c' (on the second position) is removed, and the string becomes "b".
In the second example during the first operation Petya removes '0' from the second position. After that the string becomes "Az". During the second operations the string doesn't change.
Submitted Solution:
```
stline = input()
stline = stline.split()
stline = list(map(int, stline))
seclinestring = input()
newstring = ""
lstofm = []
n = stline[0] # length of the string
m = stline[1] # number of the operations
for i in range(0, m):
lstofm.append(input())
for row in range(0, m):
l = int(lstofm[row][0])-1
r = int(lstofm[row][2])
a = lstofm[row][4]
newstring = seclinestring[:l]
substring = seclinestring[l:r]
for index in range(0,len(substring)):
if substring[index] != a:
newstring = newstring + substring[index]
newstring = newstring + seclinestring[r:]
seclinestring = newstring
print(newstring)
```
No
| 96,694
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
A widely known among some people Belarusian sport programmer Lesha decided to make some money to buy a one square meter larger flat. To do this, he wants to make and carry out a Super Rated Match (SRM) on the site Torcoder.com. But there's a problem — a severe torcoder coordinator Ivan does not accept any Lesha's problem, calling each of them an offensive word "duped" (that is, duplicated). And one day they nearely quarrelled over yet another problem Ivan wouldn't accept.
You are invited to act as a fair judge and determine whether the problem is indeed brand new, or Ivan is right and the problem bears some resemblance to those used in the previous SRMs.
You are given the descriptions of Lesha's problem and each of Torcoder.com archive problems. The description of each problem is a sequence of words. Besides, it is guaranteed that Lesha's problem has no repeated words, while the description of an archive problem may contain any number of repeated words.
The "similarity" between Lesha's problem and some archive problem can be found as follows. Among all permutations of words in Lesha's problem we choose the one that occurs in the archive problem as a subsequence. If there are multiple such permutations, we choose the one with the smallest number of inversions. Then the "similarity" of a problem can be written as <image>, where n is the number of words in Lesha's problem and x is the number of inversions in the chosen permutation. Note that the "similarity" p is always a positive integer.
The problem is called brand new if there is not a single problem in Ivan's archive which contains a permutation of words from Lesha's problem as a subsequence.
Help the boys and determine whether the proposed problem is new, or specify the problem from the archive which resembles Lesha's problem the most, otherwise.
Input
The first line contains a single integer n (1 ≤ n ≤ 15) — the number of words in Lesha's problem. The second line contains n space-separated words — the short description of the problem.
The third line contains a single integer m (1 ≤ m ≤ 10) — the number of problems in the Torcoder.com archive. Next m lines contain the descriptions of the problems as "k s1 s2 ... sk", where k (1 ≤ k ≤ 500000) is the number of words in the problem and si is a word of the problem description.
All words from all problem descriptions contain no more than 10 lowercase English letters. It is guaranteed that the total length of words in all problem descriptions does not exceed 500015.
Output
If Lesha's problem is brand new, print string "Brand new problem!" (without quotes).
Otherwise, on the first line print the index of the archive problem which resembles Lesha's problem most. If there are multiple such problems, print the one with the smallest index. On the second line print a string consisting of characters [:, character | repeated p times, and characters :], where p is the "similarity" between this problem and Lesha's one. The archive problems are numbered starting from one in the order in which they are given in the input.
Examples
Input
4
find the next palindrome
1
10 find the previous palindrome or print better luck next time
Output
1
[:||||||:]
Input
3
add two numbers
3
1 add
2 two two
3 numbers numbers numbers
Output
Brand new problem!
Input
4
these papers are formulas
3
6 what are these formulas and papers
5 papers are driving me crazy
4 crazy into the night
Output
1
[:||||:]
Input
3
add two decimals
5
4 please two decimals add
5 decimals want to be added
4 two add decimals add
4 add one two three
7 one plus two plus three equals six
Output
3
[:|||:]
Note
Let us remind you that the number of inversions is the number of pairs of words that follow in the permutation not in their original order. Thus, for example, if the original problem is "add two numbers", then permutation "numbers add two" contains two inversions — pairs of words "numbers" and "add", "numbers" and "two".
Sequence b1, b2, ..., bk is a subsequence of sequence a1, a2, ..., an if there exists such a set of indices 1 ≤ i1 < i2 < ... < ik ≤ n that aij = bj (in other words, if sequence b can be obtained from a by deleting some of its elements).
In the first test case the first problem contains the "find the palindrome next" permutation as a subsequence, in which the number of inversions equals 1 (words "palindrome" and "next").
In the second test case there is no problem that contains a permutation of words from Lesha's problem as a subsequence.
Tags: bitmasks, brute force, dp
Correct Solution:
```
import itertools
def count_inversions(enumerate_seq):
tmp = list(enumerate_seq[:])
result = 0
for i in range(len(tmp)):
for j in range(len(tmp) - 1):
if tmp[j][0] > tmp[j + 1][0]:
result += 1
tmp[j], tmp[j + 1] = tmp[j + 1], tmp[j]
return result
def sub_seq(a, b):
i, j = 0, 0
while i < len(a) and j < len(b):
if a[i] == b[j]:
i += 1
j += 1
return i == len(a)
n = int(input())
A = input().split()
B = []
m = int(input())
for _ in range(m):
B += [input().split()[1:]]
brand_new = True
best_perms = 0
best_seq = []
best_ind = -1
for i, b in enumerate(B):
for tmp in itertools.permutations(enumerate(A)):
if sub_seq([x for y, x in tmp], b):
brand_new = False
inversions = count_inversions(tmp)
similarity = n * (n - 1) // 2 - inversions + 1
if best_perms < similarity:
best_perms = similarity
best_seq = [x for y, x in tmp]
best_ind = i
if not brand_new:
print(best_ind + 1)
print('[:' + '|' * best_perms + ':]')
else:
print("Brand new problem!")
```
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
A widely known among some people Belarusian sport programmer Lesha decided to make some money to buy a one square meter larger flat. To do this, he wants to make and carry out a Super Rated Match (SRM) on the site Torcoder.com. But there's a problem — a severe torcoder coordinator Ivan does not accept any Lesha's problem, calling each of them an offensive word "duped" (that is, duplicated). And one day they nearely quarrelled over yet another problem Ivan wouldn't accept.
You are invited to act as a fair judge and determine whether the problem is indeed brand new, or Ivan is right and the problem bears some resemblance to those used in the previous SRMs.
You are given the descriptions of Lesha's problem and each of Torcoder.com archive problems. The description of each problem is a sequence of words. Besides, it is guaranteed that Lesha's problem has no repeated words, while the description of an archive problem may contain any number of repeated words.
The "similarity" between Lesha's problem and some archive problem can be found as follows. Among all permutations of words in Lesha's problem we choose the one that occurs in the archive problem as a subsequence. If there are multiple such permutations, we choose the one with the smallest number of inversions. Then the "similarity" of a problem can be written as <image>, where n is the number of words in Lesha's problem and x is the number of inversions in the chosen permutation. Note that the "similarity" p is always a positive integer.
The problem is called brand new if there is not a single problem in Ivan's archive which contains a permutation of words from Lesha's problem as a subsequence.
Help the boys and determine whether the proposed problem is new, or specify the problem from the archive which resembles Lesha's problem the most, otherwise.
Input
The first line contains a single integer n (1 ≤ n ≤ 15) — the number of words in Lesha's problem. The second line contains n space-separated words — the short description of the problem.
The third line contains a single integer m (1 ≤ m ≤ 10) — the number of problems in the Torcoder.com archive. Next m lines contain the descriptions of the problems as "k s1 s2 ... sk", where k (1 ≤ k ≤ 500000) is the number of words in the problem and si is a word of the problem description.
All words from all problem descriptions contain no more than 10 lowercase English letters. It is guaranteed that the total length of words in all problem descriptions does not exceed 500015.
Output
If Lesha's problem is brand new, print string "Brand new problem!" (without quotes).
Otherwise, on the first line print the index of the archive problem which resembles Lesha's problem most. If there are multiple such problems, print the one with the smallest index. On the second line print a string consisting of characters [:, character | repeated p times, and characters :], where p is the "similarity" between this problem and Lesha's one. The archive problems are numbered starting from one in the order in which they are given in the input.
Examples
Input
4
find the next palindrome
1
10 find the previous palindrome or print better luck next time
Output
1
[:||||||:]
Input
3
add two numbers
3
1 add
2 two two
3 numbers numbers numbers
Output
Brand new problem!
Input
4
these papers are formulas
3
6 what are these formulas and papers
5 papers are driving me crazy
4 crazy into the night
Output
1
[:||||:]
Input
3
add two decimals
5
4 please two decimals add
5 decimals want to be added
4 two add decimals add
4 add one two three
7 one plus two plus three equals six
Output
3
[:|||:]
Note
Let us remind you that the number of inversions is the number of pairs of words that follow in the permutation not in their original order. Thus, for example, if the original problem is "add two numbers", then permutation "numbers add two" contains two inversions — pairs of words "numbers" and "add", "numbers" and "two".
Sequence b1, b2, ..., bk is a subsequence of sequence a1, a2, ..., an if there exists such a set of indices 1 ≤ i1 < i2 < ... < ik ≤ n that aij = bj (in other words, if sequence b can be obtained from a by deleting some of its elements).
In the first test case the first problem contains the "find the palindrome next" permutation as a subsequence, in which the number of inversions equals 1 (words "palindrome" and "next").
In the second test case there is no problem that contains a permutation of words from Lesha's problem as a subsequence.
Tags: bitmasks, brute force, dp
Correct Solution:
```
import itertools
def check(curr_words, line):
if curr_words == []:
return True
for i in range(len(line)):
if line[i] == curr_words[0]:
return check(curr_words[1:], line[i+1:])
return False
n = int(input())
words = input().split()
m = int(input())
res, idx = 0, 0
for i in range(m):
line = input().split()[1:]
for p in itertools.permutations(range(n)):
curr_words = [words[j] for j in p]
cnt = 0
for j in range(n):
cnt += len([k for k in range(j+1, n) if p[k] < p[j]])
v = n * (n-1) // 2 - cnt + 1
if check(curr_words, line[:]) and v > res:
res, idx = v, i+1
if res > 0:
print(idx)
print('[:'+str('|'*res)+':]')
else:
print('Brand new problem!')
```
| 97,264
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Your friend has n cards.
You know that each card has a lowercase English letter on one side and a digit on the other.
Currently, your friend has laid out the cards on a table so only one side of each card is visible.
You would like to know if the following statement is true for cards that your friend owns: "If a card has a vowel on one side, then it has an even digit on the other side." More specifically, a vowel is one of 'a', 'e', 'i', 'o' or 'u', and even digit is one of '0', '2', '4', '6' or '8'.
For example, if a card has 'a' on one side, and '6' on the other side, then this statement is true for it. Also, the statement is true, for example, for a card with 'b' and '4', and for a card with 'b' and '3' (since the letter is not a vowel). The statement is false, for example, for card with 'e' and '5'. You are interested if the statement is true for all cards. In particular, if no card has a vowel, the statement is true.
To determine this, you can flip over some cards to reveal the other side. You would like to know what is the minimum number of cards you need to flip in the worst case in order to verify that the statement is true.
Input
The first and only line of input will contain a string s (1 ≤ |s| ≤ 50), denoting the sides of the cards that you can see on the table currently. Each character of s is either a lowercase English letter or a digit.
Output
Print a single integer, the minimum number of cards you must turn over to verify your claim.
Examples
Input
ee
Output
2
Input
z
Output
0
Input
0ay1
Output
2
Note
In the first sample, we must turn over both cards. Note that even though both cards have the same letter, they could possibly have different numbers on the other side.
In the second sample, we don't need to turn over any cards. The statement is vacuously true, since you know your friend has no cards with a vowel on them.
In the third sample, we need to flip the second and fourth cards.
Tags: brute force, implementation
Correct Solution:
```
cards = input()
flips = 0
for i in range(0, len(cards)):
if(cards[i] in '0123456789'):
if(int(cards[i])%2 != 0):
flips +=1
else:
if(cards[i] in 'aeiou'):
flips +=1
print(flips)
```
| 97,546
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Your friend has n cards.
You know that each card has a lowercase English letter on one side and a digit on the other.
Currently, your friend has laid out the cards on a table so only one side of each card is visible.
You would like to know if the following statement is true for cards that your friend owns: "If a card has a vowel on one side, then it has an even digit on the other side." More specifically, a vowel is one of 'a', 'e', 'i', 'o' or 'u', and even digit is one of '0', '2', '4', '6' or '8'.
For example, if a card has 'a' on one side, and '6' on the other side, then this statement is true for it. Also, the statement is true, for example, for a card with 'b' and '4', and for a card with 'b' and '3' (since the letter is not a vowel). The statement is false, for example, for card with 'e' and '5'. You are interested if the statement is true for all cards. In particular, if no card has a vowel, the statement is true.
To determine this, you can flip over some cards to reveal the other side. You would like to know what is the minimum number of cards you need to flip in the worst case in order to verify that the statement is true.
Input
The first and only line of input will contain a string s (1 ≤ |s| ≤ 50), denoting the sides of the cards that you can see on the table currently. Each character of s is either a lowercase English letter or a digit.
Output
Print a single integer, the minimum number of cards you must turn over to verify your claim.
Examples
Input
ee
Output
2
Input
z
Output
0
Input
0ay1
Output
2
Note
In the first sample, we must turn over both cards. Note that even though both cards have the same letter, they could possibly have different numbers on the other side.
In the second sample, we don't need to turn over any cards. The statement is vacuously true, since you know your friend has no cards with a vowel on them.
In the third sample, we need to flip the second and fourth cards.
Tags: brute force, implementation
Correct Solution:
```
test_string = input()
turns = 0
for char in test_string:
if char in ['1', '3', '5', '7', '9', 'a', 'e', 'i', 'o', 'u']:
turns += 1
print(turns)
```
| 97,547
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Your friend has n cards.
You know that each card has a lowercase English letter on one side and a digit on the other.
Currently, your friend has laid out the cards on a table so only one side of each card is visible.
You would like to know if the following statement is true for cards that your friend owns: "If a card has a vowel on one side, then it has an even digit on the other side." More specifically, a vowel is one of 'a', 'e', 'i', 'o' or 'u', and even digit is one of '0', '2', '4', '6' or '8'.
For example, if a card has 'a' on one side, and '6' on the other side, then this statement is true for it. Also, the statement is true, for example, for a card with 'b' and '4', and for a card with 'b' and '3' (since the letter is not a vowel). The statement is false, for example, for card with 'e' and '5'. You are interested if the statement is true for all cards. In particular, if no card has a vowel, the statement is true.
To determine this, you can flip over some cards to reveal the other side. You would like to know what is the minimum number of cards you need to flip in the worst case in order to verify that the statement is true.
Input
The first and only line of input will contain a string s (1 ≤ |s| ≤ 50), denoting the sides of the cards that you can see on the table currently. Each character of s is either a lowercase English letter or a digit.
Output
Print a single integer, the minimum number of cards you must turn over to verify your claim.
Examples
Input
ee
Output
2
Input
z
Output
0
Input
0ay1
Output
2
Note
In the first sample, we must turn over both cards. Note that even though both cards have the same letter, they could possibly have different numbers on the other side.
In the second sample, we don't need to turn over any cards. The statement is vacuously true, since you know your friend has no cards with a vowel on them.
In the third sample, we need to flip the second and fourth cards.
Tags: brute force, implementation
Correct Solution:
```
s = input("")
count = 0
for i in s:
if i in "aeiou13579":
count +=1
print (count)
```
| 97,548
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Your friend has n cards.
You know that each card has a lowercase English letter on one side and a digit on the other.
Currently, your friend has laid out the cards on a table so only one side of each card is visible.
You would like to know if the following statement is true for cards that your friend owns: "If a card has a vowel on one side, then it has an even digit on the other side." More specifically, a vowel is one of 'a', 'e', 'i', 'o' or 'u', and even digit is one of '0', '2', '4', '6' or '8'.
For example, if a card has 'a' on one side, and '6' on the other side, then this statement is true for it. Also, the statement is true, for example, for a card with 'b' and '4', and for a card with 'b' and '3' (since the letter is not a vowel). The statement is false, for example, for card with 'e' and '5'. You are interested if the statement is true for all cards. In particular, if no card has a vowel, the statement is true.
To determine this, you can flip over some cards to reveal the other side. You would like to know what is the minimum number of cards you need to flip in the worst case in order to verify that the statement is true.
Input
The first and only line of input will contain a string s (1 ≤ |s| ≤ 50), denoting the sides of the cards that you can see on the table currently. Each character of s is either a lowercase English letter or a digit.
Output
Print a single integer, the minimum number of cards you must turn over to verify your claim.
Examples
Input
ee
Output
2
Input
z
Output
0
Input
0ay1
Output
2
Note
In the first sample, we must turn over both cards. Note that even though both cards have the same letter, they could possibly have different numbers on the other side.
In the second sample, we don't need to turn over any cards. The statement is vacuously true, since you know your friend has no cards with a vowel on them.
In the third sample, we need to flip the second and fourth cards.
Tags: brute force, implementation
Correct Solution:
```
s = input()
cnt = 0
for c in s:
if c in '13579':
cnt += 1
elif c in 'aeiou':
cnt += 1
print(cnt)
```
| 97,549
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Your friend has n cards.
You know that each card has a lowercase English letter on one side and a digit on the other.
Currently, your friend has laid out the cards on a table so only one side of each card is visible.
You would like to know if the following statement is true for cards that your friend owns: "If a card has a vowel on one side, then it has an even digit on the other side." More specifically, a vowel is one of 'a', 'e', 'i', 'o' or 'u', and even digit is one of '0', '2', '4', '6' or '8'.
For example, if a card has 'a' on one side, and '6' on the other side, then this statement is true for it. Also, the statement is true, for example, for a card with 'b' and '4', and for a card with 'b' and '3' (since the letter is not a vowel). The statement is false, for example, for card with 'e' and '5'. You are interested if the statement is true for all cards. In particular, if no card has a vowel, the statement is true.
To determine this, you can flip over some cards to reveal the other side. You would like to know what is the minimum number of cards you need to flip in the worst case in order to verify that the statement is true.
Input
The first and only line of input will contain a string s (1 ≤ |s| ≤ 50), denoting the sides of the cards that you can see on the table currently. Each character of s is either a lowercase English letter or a digit.
Output
Print a single integer, the minimum number of cards you must turn over to verify your claim.
Examples
Input
ee
Output
2
Input
z
Output
0
Input
0ay1
Output
2
Note
In the first sample, we must turn over both cards. Note that even though both cards have the same letter, they could possibly have different numbers on the other side.
In the second sample, we don't need to turn over any cards. The statement is vacuously true, since you know your friend has no cards with a vowel on them.
In the third sample, we need to flip the second and fourth cards.
Tags: brute force, implementation
Correct Solution:
```
s = input()
c=0
for i in range(len(s)):
if s[i] == 'a' or \
s[i] == 'e' or \
s[i] == 'i' or \
s[i] == 'o' or \
s[i] == 'u' or \
s[i] == '1' or \
s[i] == '3' or \
s[i] == '5' or \
s[i] == '7' or \
s[i] == '9':
c = c + 1
print(c)
```
| 97,550
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Your friend has n cards.
You know that each card has a lowercase English letter on one side and a digit on the other.
Currently, your friend has laid out the cards on a table so only one side of each card is visible.
You would like to know if the following statement is true for cards that your friend owns: "If a card has a vowel on one side, then it has an even digit on the other side." More specifically, a vowel is one of 'a', 'e', 'i', 'o' or 'u', and even digit is one of '0', '2', '4', '6' or '8'.
For example, if a card has 'a' on one side, and '6' on the other side, then this statement is true for it. Also, the statement is true, for example, for a card with 'b' and '4', and for a card with 'b' and '3' (since the letter is not a vowel). The statement is false, for example, for card with 'e' and '5'. You are interested if the statement is true for all cards. In particular, if no card has a vowel, the statement is true.
To determine this, you can flip over some cards to reveal the other side. You would like to know what is the minimum number of cards you need to flip in the worst case in order to verify that the statement is true.
Input
The first and only line of input will contain a string s (1 ≤ |s| ≤ 50), denoting the sides of the cards that you can see on the table currently. Each character of s is either a lowercase English letter or a digit.
Output
Print a single integer, the minimum number of cards you must turn over to verify your claim.
Examples
Input
ee
Output
2
Input
z
Output
0
Input
0ay1
Output
2
Note
In the first sample, we must turn over both cards. Note that even though both cards have the same letter, they could possibly have different numbers on the other side.
In the second sample, we don't need to turn over any cards. The statement is vacuously true, since you know your friend has no cards with a vowel on them.
In the third sample, we need to flip the second and fourth cards.
Tags: brute force, implementation
Correct Solution:
```
print(sum(x in 'aeiou13579' for x in input()))
```
| 97,551
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Your friend has n cards.
You know that each card has a lowercase English letter on one side and a digit on the other.
Currently, your friend has laid out the cards on a table so only one side of each card is visible.
You would like to know if the following statement is true for cards that your friend owns: "If a card has a vowel on one side, then it has an even digit on the other side." More specifically, a vowel is one of 'a', 'e', 'i', 'o' or 'u', and even digit is one of '0', '2', '4', '6' or '8'.
For example, if a card has 'a' on one side, and '6' on the other side, then this statement is true for it. Also, the statement is true, for example, for a card with 'b' and '4', and for a card with 'b' and '3' (since the letter is not a vowel). The statement is false, for example, for card with 'e' and '5'. You are interested if the statement is true for all cards. In particular, if no card has a vowel, the statement is true.
To determine this, you can flip over some cards to reveal the other side. You would like to know what is the minimum number of cards you need to flip in the worst case in order to verify that the statement is true.
Input
The first and only line of input will contain a string s (1 ≤ |s| ≤ 50), denoting the sides of the cards that you can see on the table currently. Each character of s is either a lowercase English letter or a digit.
Output
Print a single integer, the minimum number of cards you must turn over to verify your claim.
Examples
Input
ee
Output
2
Input
z
Output
0
Input
0ay1
Output
2
Note
In the first sample, we must turn over both cards. Note that even though both cards have the same letter, they could possibly have different numbers on the other side.
In the second sample, we don't need to turn over any cards. The statement is vacuously true, since you know your friend has no cards with a vowel on them.
In the third sample, we need to flip the second and fourth cards.
Tags: brute force, implementation
Correct Solution:
```
s = input()
result = 0
for c in s:
if c in ['a', 'e', 'i', 'o', 'u', '1', '3', '5', '7', '9']:
result += 1
print(result)
```
| 97,552
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Your friend has n cards.
You know that each card has a lowercase English letter on one side and a digit on the other.
Currently, your friend has laid out the cards on a table so only one side of each card is visible.
You would like to know if the following statement is true for cards that your friend owns: "If a card has a vowel on one side, then it has an even digit on the other side." More specifically, a vowel is one of 'a', 'e', 'i', 'o' or 'u', and even digit is one of '0', '2', '4', '6' or '8'.
For example, if a card has 'a' on one side, and '6' on the other side, then this statement is true for it. Also, the statement is true, for example, for a card with 'b' and '4', and for a card with 'b' and '3' (since the letter is not a vowel). The statement is false, for example, for card with 'e' and '5'. You are interested if the statement is true for all cards. In particular, if no card has a vowel, the statement is true.
To determine this, you can flip over some cards to reveal the other side. You would like to know what is the minimum number of cards you need to flip in the worst case in order to verify that the statement is true.
Input
The first and only line of input will contain a string s (1 ≤ |s| ≤ 50), denoting the sides of the cards that you can see on the table currently. Each character of s is either a lowercase English letter or a digit.
Output
Print a single integer, the minimum number of cards you must turn over to verify your claim.
Examples
Input
ee
Output
2
Input
z
Output
0
Input
0ay1
Output
2
Note
In the first sample, we must turn over both cards. Note that even though both cards have the same letter, they could possibly have different numbers on the other side.
In the second sample, we don't need to turn over any cards. The statement is vacuously true, since you know your friend has no cards with a vowel on them.
In the third sample, we need to flip the second and fourth cards.
Tags: brute force, implementation
Correct Solution:
```
s = input()
l = len(s)
match = ['a','e','i','u','o']
match_num = ['0','2','4','6','8']
count = 0
for i in range(l):
if s[i].isdigit():
if not (s[i] in match_num):
count += 1
else:
if s[i] in match:
count += 1
print(count)
```
| 97,553
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Arcady is a copywriter. His today's task is to type up an already well-designed story using his favorite text editor.
Arcady types words, punctuation signs and spaces one after another. Each letter and each sign (including line feed) requires one keyboard click in order to be printed. Moreover, when Arcady has a non-empty prefix of some word on the screen, the editor proposes a possible autocompletion for this word, more precisely one of the already printed words such that its prefix matches the currently printed prefix if this word is unique. For example, if Arcady has already printed «codeforces», «coding» and «codeforces» once again, then there will be no autocompletion attempt for «cod», but if he proceeds with «code», the editor will propose «codeforces».
With a single click Arcady can follow the editor's proposal, i.e. to transform the current prefix to it. Note that no additional symbols are printed after the autocompletion (no spaces, line feeds, etc). What is the minimum number of keyboard clicks Arcady has to perform to print the entire text, if he is not allowed to move the cursor or erase the already printed symbols?
A word here is a contiguous sequence of latin letters bordered by spaces, punctuation signs and line/text beginnings/ends. Arcady uses only lowercase letters. For example, there are 20 words in «it's well-known that tic-tac-toe is a paper-and-pencil game for two players, x and o.».
Input
The only line contains Arcady's text, consisting only of lowercase latin letters, spaces, line feeds and the following punctuation signs: «.», «,», «?», «!», «'» and «-». The total amount of symbols doesn't exceed 3·105. It's guaranteed that all lines are non-empty.
Output
Print a single integer — the minimum number of clicks.
Examples
Input
snow affects sports such as skiing, snowboarding, and snowmachine travel.
snowboarding is a recreational activity and olympic and paralympic sport.
Output
141
Input
'co-co-co, codeforces?!'
Output
25
Input
thun-thun-thunder, thunder, thunder
thunder, thun-, thunder
thun-thun-thunder, thunder
thunder, feel the thunder
lightning then the thunder
thunder, feel the thunder
lightning then the thunder
thunder, thunder
Output
183
Note
In sample case one it's optimal to use autocompletion for the first instance of «snowboarding» after typing up «sn» and for the second instance of «snowboarding» after typing up «snowb». This will save 7 clicks.
In sample case two it doesn't matter whether to use autocompletion or not.
Tags: *special, strings, trees
Correct Solution:
```
# python3
# utf-8
class Trie:
def __init__(self):
self.letter___node = {}
self.words_nr = 0
def add_word(self, word):
word = word + '$'
curr_node = self
for letter in word:
if letter not in curr_node.letter___node:
curr_node.letter___node[letter] = Trie()
curr_node.words_nr += 1
curr_node = curr_node.letter___node[letter]
def check_word(self, word):
word = word + '$'
curr_node = self
for letter in word:
if letter not in curr_node.letter___node:
return False
curr_node = curr_node.letter___node[letter]
return True
def count_word(self, word):
word = word + '$'
curr_node = self
curr_state = 0
presses_saved = 0
for letter in word:
if letter not in curr_node.letter___node:
if curr_state == 1:
# print(presses_saved)
if '$' in curr_node.letter___node:
return min(len(word) - 1,
len(word) - 1 - presses_saved + 1
)
else:
return len(word) - 1
if curr_state == 0:
return len(word) - 1
if curr_node.words_nr > 1:
curr_node = curr_node.letter___node[letter]
elif curr_node.words_nr == 1:
# print(letter, presses_saved)
if curr_state == 0:
curr_state = 1
presses_saved += 1
curr_node = curr_node.letter___node[letter]
elif curr_node.words_nr == 0:
if curr_state == 1:
return min(len(word) - 1,
len(word) - 1 - presses_saved + 1
)
elif curr_state == 0:
return len(word) - 1
if curr_node.words_nr == 0:
presses_saved -= 1
if curr_state == 1:
return min(len(word) - 1,
len(word) - 1 - presses_saved + 1
)
elif curr_state == 0:
return len(word) - 1
text = ''
while(1):
try:
line = input()
if line == '':
raise Exception('e')
text += line + '\n'
except:
break
# print(text)
ans = 0
syms = ['\n', '.', ',', '?', '!', "'", '-']
for sym in syms:
text = text.replace(sym, ' ')
ans += text.count(' ')
idx___word = text.split(' ')
root = Trie()
root.add_word('$')
root.add_word('$$')
for word in idx___word:
if word == '':
continue
count = root.count_word(word)
check = root.check_word(word)
# print(word, check, count)
ans += count
if not check:
root.add_word(word)
print(ans)
```
| 97,562
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Arcady is a copywriter. His today's task is to type up an already well-designed story using his favorite text editor.
Arcady types words, punctuation signs and spaces one after another. Each letter and each sign (including line feed) requires one keyboard click in order to be printed. Moreover, when Arcady has a non-empty prefix of some word on the screen, the editor proposes a possible autocompletion for this word, more precisely one of the already printed words such that its prefix matches the currently printed prefix if this word is unique. For example, if Arcady has already printed «codeforces», «coding» and «codeforces» once again, then there will be no autocompletion attempt for «cod», but if he proceeds with «code», the editor will propose «codeforces».
With a single click Arcady can follow the editor's proposal, i.e. to transform the current prefix to it. Note that no additional symbols are printed after the autocompletion (no spaces, line feeds, etc). What is the minimum number of keyboard clicks Arcady has to perform to print the entire text, if he is not allowed to move the cursor or erase the already printed symbols?
A word here is a contiguous sequence of latin letters bordered by spaces, punctuation signs and line/text beginnings/ends. Arcady uses only lowercase letters. For example, there are 20 words in «it's well-known that tic-tac-toe is a paper-and-pencil game for two players, x and o.».
Input
The only line contains Arcady's text, consisting only of lowercase latin letters, spaces, line feeds and the following punctuation signs: «.», «,», «?», «!», «'» and «-». The total amount of symbols doesn't exceed 3·105. It's guaranteed that all lines are non-empty.
Output
Print a single integer — the minimum number of clicks.
Examples
Input
snow affects sports such as skiing, snowboarding, and snowmachine travel.
snowboarding is a recreational activity and olympic and paralympic sport.
Output
141
Input
'co-co-co, codeforces?!'
Output
25
Input
thun-thun-thunder, thunder, thunder
thunder, thun-, thunder
thun-thun-thunder, thunder
thunder, feel the thunder
lightning then the thunder
thunder, feel the thunder
lightning then the thunder
thunder, thunder
Output
183
Note
In sample case one it's optimal to use autocompletion for the first instance of «snowboarding» after typing up «sn» and for the second instance of «snowboarding» after typing up «snowb». This will save 7 clicks.
In sample case two it doesn't matter whether to use autocompletion or not.
Tags: *special, strings, trees
Correct Solution:
```
class Ddict:
def __init__(self):
self.dicts={}
def add(self,key):
d=self.dicts
for i in key:
if i not in d:
d[i]={}
d=d[i]
d[' ']=''
def find(self,key):
if key=='':
return '',''
d=self.dicts
q=[]
h=[key[0]]
for i in key:
if i not in d:
if ' ' in d and len(d)==1:
return ''.join(q),''.join(h)
return '',''
q.append(i)
if len(d)!=1:
h=q[:]
d=d[i]
if ' ' in d and len(d)==1:
return ''.join(q),''.join(h)
return '',''
words = Ddict()
ans=0
while True:
try:
x=input()
if not x:
break
except:
break
ans+=len(x)+1
ws=[[]]
for i in x:
if i in '.,?!\'- ':
if ws[-1]:
ws.append([])
else:
ws[-1].append(i)
ws=list(map(lambda e:''.join(e),ws))
for w in ws:
next_word,helped_word = words.find(w)
if next_word and next_word!=helped_word:
ans-=len(next_word)-len(helped_word)-1
words.add(w)
print(ans)
```
| 97,563
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Arcady is a copywriter. His today's task is to type up an already well-designed story using his favorite text editor.
Arcady types words, punctuation signs and spaces one after another. Each letter and each sign (including line feed) requires one keyboard click in order to be printed. Moreover, when Arcady has a non-empty prefix of some word on the screen, the editor proposes a possible autocompletion for this word, more precisely one of the already printed words such that its prefix matches the currently printed prefix if this word is unique. For example, if Arcady has already printed «codeforces», «coding» and «codeforces» once again, then there will be no autocompletion attempt for «cod», but if he proceeds with «code», the editor will propose «codeforces».
With a single click Arcady can follow the editor's proposal, i.e. to transform the current prefix to it. Note that no additional symbols are printed after the autocompletion (no spaces, line feeds, etc). What is the minimum number of keyboard clicks Arcady has to perform to print the entire text, if he is not allowed to move the cursor or erase the already printed symbols?
A word here is a contiguous sequence of latin letters bordered by spaces, punctuation signs and line/text beginnings/ends. Arcady uses only lowercase letters. For example, there are 20 words in «it's well-known that tic-tac-toe is a paper-and-pencil game for two players, x and o.».
Input
The only line contains Arcady's text, consisting only of lowercase latin letters, spaces, line feeds and the following punctuation signs: «.», «,», «?», «!», «'» and «-». The total amount of symbols doesn't exceed 3·105. It's guaranteed that all lines are non-empty.
Output
Print a single integer — the minimum number of clicks.
Examples
Input
snow affects sports such as skiing, snowboarding, and snowmachine travel.
snowboarding is a recreational activity and olympic and paralympic sport.
Output
141
Input
'co-co-co, codeforces?!'
Output
25
Input
thun-thun-thunder, thunder, thunder
thunder, thun-, thunder
thun-thun-thunder, thunder
thunder, feel the thunder
lightning then the thunder
thunder, feel the thunder
lightning then the thunder
thunder, thunder
Output
183
Note
In sample case one it's optimal to use autocompletion for the first instance of «snowboarding» after typing up «sn» and for the second instance of «snowboarding» after typing up «snowb». This will save 7 clicks.
In sample case two it doesn't matter whether to use autocompletion or not.
Tags: *special, strings, trees
Correct Solution:
```
# ------------------- fast io --------------------
import os
import sys
from io import BytesIO, IOBase
BUFSIZE = 8192
class FastIO(IOBase):
newlines = 0
def __init__(self, file):
self._fd = file.fileno()
self.buffer = BytesIO()
self.writable = "x" in file.mode or "r" not in file.mode
self.write = self.buffer.write if self.writable else None
def read(self):
while True:
b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
if not b:
break
ptr = self.buffer.tell()
self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
self.newlines = 0
return self.buffer.read()
def readline(self):
while self.newlines == 0:
b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
self.newlines = b.count(b"\n") + (not b)
ptr = self.buffer.tell()
self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
self.newlines -= 1
return self.buffer.readline()
def flush(self):
if self.writable:
os.write(self._fd, self.buffer.getvalue())
self.buffer.truncate(0), self.buffer.seek(0)
class IOWrapper(IOBase):
def __init__(self, file):
self.buffer = FastIO(file)
self.flush = self.buffer.flush
self.writable = self.buffer.writable
self.write = lambda s: self.buffer.write(s.encode("ascii"))
self.read = lambda: self.buffer.read().decode("ascii")
self.readline = lambda: self.buffer.readline().decode("ascii")
sys.stdin, sys.stdout = IOWrapper(sys.stdin), IOWrapper(sys.stdout)
input = lambda: sys.stdin.readline().rstrip("\r\n")
# ------------------- fast io --------------------
class Trie:
class Node:
def __init__(self, char: int = 1):
self.char = char
self.children = []
self.counter = 1
def __init__(self):
self.root = Trie.Node()
self.ans = 0
def add(self, word):
node = self.root
for char in word:
found_in_child = False
for child in node.children:
if child.char == char:
child.counter += 1
node = child
found_in_child = True
break
if not found_in_child:
new_node = Trie.Node(char)
node.children.append(new_node)
node = new_node
def query(self, prefix, root=None):
if not root: root = self.root
node = root
if not root.children:
return 0
prefix = [prefix]
for char in prefix:
char_not_found = True
for child in node.children:
if child.char == char:
char_not_found = False
node = child
break
if char_not_found:
return 0
return node
a = []
tr = Trie()
while True:
try:
s = input()
if not s:break
except EOFError:
break
a += [s]
def calc(s):
node = tr.root
found = False
ind = -1
its = 0
for char in s:
if not found:
ind += 1
next = tr.query(char, node)
if not next:
break
if next.counter == 1 and not found:
found = True
node = next
its += 1
if found and node.counter == 1:
if not node.children:
tr.ans += min(len(s), ind + 2 + len(s)-its)
elif node.children:
tr.ans += len(s)
else:
tr.ans += min(len(s), ind + 2)
else:
tr.ans += len(s)
if not (its == len(s) and not node.children):
tr.add(s)
for s in a:
tr.ans += 1
cur = []
if 1:
for k in s:
if not k.isalpha():
tr.ans += 1
if cur:
calc(cur)
cur = []
else:
cur += [ord(k)]
if cur:
calc(cur)
print(tr.ans)
```
| 97,564
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Arcady is a copywriter. His today's task is to type up an already well-designed story using his favorite text editor.
Arcady types words, punctuation signs and spaces one after another. Each letter and each sign (including line feed) requires one keyboard click in order to be printed. Moreover, when Arcady has a non-empty prefix of some word on the screen, the editor proposes a possible autocompletion for this word, more precisely one of the already printed words such that its prefix matches the currently printed prefix if this word is unique. For example, if Arcady has already printed «codeforces», «coding» and «codeforces» once again, then there will be no autocompletion attempt for «cod», but if he proceeds with «code», the editor will propose «codeforces».
With a single click Arcady can follow the editor's proposal, i.e. to transform the current prefix to it. Note that no additional symbols are printed after the autocompletion (no spaces, line feeds, etc). What is the minimum number of keyboard clicks Arcady has to perform to print the entire text, if he is not allowed to move the cursor or erase the already printed symbols?
A word here is a contiguous sequence of latin letters bordered by spaces, punctuation signs and line/text beginnings/ends. Arcady uses only lowercase letters. For example, there are 20 words in «it's well-known that tic-tac-toe is a paper-and-pencil game for two players, x and o.».
Input
The only line contains Arcady's text, consisting only of lowercase latin letters, spaces, line feeds and the following punctuation signs: «.», «,», «?», «!», «'» and «-». The total amount of symbols doesn't exceed 3·105. It's guaranteed that all lines are non-empty.
Output
Print a single integer — the minimum number of clicks.
Examples
Input
snow affects sports such as skiing, snowboarding, and snowmachine travel.
snowboarding is a recreational activity and olympic and paralympic sport.
Output
141
Input
'co-co-co, codeforces?!'
Output
25
Input
thun-thun-thunder, thunder, thunder
thunder, thun-, thunder
thun-thun-thunder, thunder
thunder, feel the thunder
lightning then the thunder
thunder, feel the thunder
lightning then the thunder
thunder, thunder
Output
183
Note
In sample case one it's optimal to use autocompletion for the first instance of «snowboarding» after typing up «sn» and for the second instance of «snowboarding» after typing up «snowb». This will save 7 clicks.
In sample case two it doesn't matter whether to use autocompletion or not.
Tags: *special, strings, trees
Correct Solution:
```
import sys
import re
SEPARATORS = "[.,? !'-]"
class TrieNode(object):
def __init__(self):
self.terminal = False
self.go = {}
self.count = 0
def insert(node, s):
nodes = [node]
unique, auto = 0, 0
for c in s:
if c not in node.go:
node.go[c] = TrieNode()
node = node.go[c]
nodes.append(node)
if node.count == 1:
unique += 1
if node.terminal:
auto = max(unique - 2, 0)
if not node.terminal:
node.terminal = True
for node in nodes:
node.count += 1
return auto
root = TrieNode()
answer = 0
for line in sys.stdin:
answer += len(line)
for word in filter(None, re.split(SEPARATORS, line.strip())):
answer -= insert(root, word)
print(answer)
```
| 97,565
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Arcady is a copywriter. His today's task is to type up an already well-designed story using his favorite text editor.
Arcady types words, punctuation signs and spaces one after another. Each letter and each sign (including line feed) requires one keyboard click in order to be printed. Moreover, when Arcady has a non-empty prefix of some word on the screen, the editor proposes a possible autocompletion for this word, more precisely one of the already printed words such that its prefix matches the currently printed prefix if this word is unique. For example, if Arcady has already printed «codeforces», «coding» and «codeforces» once again, then there will be no autocompletion attempt for «cod», but if he proceeds with «code», the editor will propose «codeforces».
With a single click Arcady can follow the editor's proposal, i.e. to transform the current prefix to it. Note that no additional symbols are printed after the autocompletion (no spaces, line feeds, etc). What is the minimum number of keyboard clicks Arcady has to perform to print the entire text, if he is not allowed to move the cursor or erase the already printed symbols?
A word here is a contiguous sequence of latin letters bordered by spaces, punctuation signs and line/text beginnings/ends. Arcady uses only lowercase letters. For example, there are 20 words in «it's well-known that tic-tac-toe is a paper-and-pencil game for two players, x and o.».
Input
The only line contains Arcady's text, consisting only of lowercase latin letters, spaces, line feeds and the following punctuation signs: «.», «,», «?», «!», «'» and «-». The total amount of symbols doesn't exceed 3·105. It's guaranteed that all lines are non-empty.
Output
Print a single integer — the minimum number of clicks.
Examples
Input
snow affects sports such as skiing, snowboarding, and snowmachine travel.
snowboarding is a recreational activity and olympic and paralympic sport.
Output
141
Input
'co-co-co, codeforces?!'
Output
25
Input
thun-thun-thunder, thunder, thunder
thunder, thun-, thunder
thun-thun-thunder, thunder
thunder, feel the thunder
lightning then the thunder
thunder, feel the thunder
lightning then the thunder
thunder, thunder
Output
183
Note
In sample case one it's optimal to use autocompletion for the first instance of «snowboarding» after typing up «sn» and for the second instance of «snowboarding» after typing up «snowb». This will save 7 clicks.
In sample case two it doesn't matter whether to use autocompletion or not.
Tags: *special, strings, trees
Correct Solution:
```
import sys
def read_text():
text = ''
for line in sys.stdin:
text += line
return text
# def read_text():
# text = ''
# next_line = input()
# while len(next_line) > 0:
# text += next_line + '\n'
# next_line = input()
# return text
def matching_word(word, bor, symbol, search):
if symbol in search:
search = search[symbol]
word_found = 'size' in search and search['size'] == 1
return get_match(word, bor) if word_found else 0, search
return 0, ()
def contains_word(word, bor):
search = bor
for symbol in word:
if symbol in search:
search = search[symbol]
else:
return False
words_left = 0
for key, value in search.items():
if key == 'size':
continue
words_left += value['size']
return search['size'] - words_left == 1
def get_match(word, bor):
search = bor
match = ''
for symbol in word:
match += symbol
search = search[symbol]
while len(search.keys()) == 2:
symbol = next(filter(lambda item: item != 'size', search.keys()))
match += symbol
search = search[symbol]
return match
def add_to_bor(word, bor):
search = bor
for symbol in word:
if symbol not in search:
search[symbol] = dict([('size', 0)])
search = search[symbol]
search['size'] += 1
def replace_index(text, start, match):
index = start
for symbol in match:
if symbol == text[index]:
index += 1
else:
return -1
return start + len(match) - 1
def get_updated_search(word, bor):
search = bor
for symbol in word:
search = search[symbol]
return search
text = list(read_text())
text_size = len(text)
bor = dict()
separators = ['.', ',', '?', '!', '\'', '-', ' ', '\n']
typed = 0
index = 0
word = ''
search = bor
match = 0
while index < text_size:
symbol = text[index]
typed += 1
if symbol not in separators:
word += symbol
if match != -1:
match, search = matching_word(word, bor, symbol, search)
if match != 0 and match != word:
new_index = replace_index(text, index + 1 - len(word), match)
if new_index != -1:
typed += 1
index = new_index
word = match
search = get_updated_search(word, bor)
else:
match = -1
elif len(word) > 0:
if not contains_word(word, bor):
add_to_bor(word, bor)
search = bor
word = ''
match = 0
index += 1
print(typed)
```
| 97,566
|
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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.
Arcady is a copywriter. His today's task is to type up an already well-designed story using his favorite text editor.
Arcady types words, punctuation signs and spaces one after another. Each letter and each sign (including line feed) requires one keyboard click in order to be printed. Moreover, when Arcady has a non-empty prefix of some word on the screen, the editor proposes a possible autocompletion for this word, more precisely one of the already printed words such that its prefix matches the currently printed prefix if this word is unique. For example, if Arcady has already printed «codeforces», «coding» and «codeforces» once again, then there will be no autocompletion attempt for «cod», but if he proceeds with «code», the editor will propose «codeforces».
With a single click Arcady can follow the editor's proposal, i.e. to transform the current prefix to it. Note that no additional symbols are printed after the autocompletion (no spaces, line feeds, etc). What is the minimum number of keyboard clicks Arcady has to perform to print the entire text, if he is not allowed to move the cursor or erase the already printed symbols?
A word here is a contiguous sequence of latin letters bordered by spaces, punctuation signs and line/text beginnings/ends. Arcady uses only lowercase letters. For example, there are 20 words in «it's well-known that tic-tac-toe is a paper-and-pencil game for two players, x and o.».
Input
The only line contains Arcady's text, consisting only of lowercase latin letters, spaces, line feeds and the following punctuation signs: «.», «,», «?», «!», «'» and «-». The total amount of symbols doesn't exceed 3·105. It's guaranteed that all lines are non-empty.
Output
Print a single integer — the minimum number of clicks.
Examples
Input
snow affects sports such as skiing, snowboarding, and snowmachine travel.
snowboarding is a recreational activity and olympic and paralympic sport.
Output
141
Input
'co-co-co, codeforces?!'
Output
25
Input
thun-thun-thunder, thunder, thunder
thunder, thun-, thunder
thun-thun-thunder, thunder
thunder, feel the thunder
lightning then the thunder
thunder, feel the thunder
lightning then the thunder
thunder, thunder
Output
183
Note
In sample case one it's optimal to use autocompletion for the first instance of «snowboarding» after typing up «sn» and for the second instance of «snowboarding» after typing up «snowb». This will save 7 clicks.
In sample case two it doesn't matter whether to use autocompletion or not.
Submitted Solution:
```
def main(file = None):
text = ""
part = input()
while part:
text += part +'\n'
try:
part = input()
except EOFError:
part = ""
total = len(text)
word = ""
for l in text:
if l.isalpha():
word += l
elif word:
short = shortcut(word)
total -= short
update(word)
word = ""
return total
prev = set()
def shortcut(word):
for i in range(1, len(word)-2):
occ = 0
part = word[:i]
for auto in prev:
if auto.startswith(part) and auto != part:
occ += 1
latest = auto
if occ == 1 and word.startswith(latest):
return len(latest)-len(part)-1
return 0
def update(word):
prev.add(word)
if __name__ == '__main__':
print(main())
```
No
| 97,567
|
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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.
Arcady is a copywriter. His today's task is to type up an already well-designed story using his favorite text editor.
Arcady types words, punctuation signs and spaces one after another. Each letter and each sign (including line feed) requires one keyboard click in order to be printed. Moreover, when Arcady has a non-empty prefix of some word on the screen, the editor proposes a possible autocompletion for this word, more precisely one of the already printed words such that its prefix matches the currently printed prefix if this word is unique. For example, if Arcady has already printed «codeforces», «coding» and «codeforces» once again, then there will be no autocompletion attempt for «cod», but if he proceeds with «code», the editor will propose «codeforces».
With a single click Arcady can follow the editor's proposal, i.e. to transform the current prefix to it. Note that no additional symbols are printed after the autocompletion (no spaces, line feeds, etc). What is the minimum number of keyboard clicks Arcady has to perform to print the entire text, if he is not allowed to move the cursor or erase the already printed symbols?
A word here is a contiguous sequence of latin letters bordered by spaces, punctuation signs and line/text beginnings/ends. Arcady uses only lowercase letters. For example, there are 20 words in «it's well-known that tic-tac-toe is a paper-and-pencil game for two players, x and o.».
Input
The only line contains Arcady's text, consisting only of lowercase latin letters, spaces, line feeds and the following punctuation signs: «.», «,», «?», «!», «'» and «-». The total amount of symbols doesn't exceed 3·105. It's guaranteed that all lines are non-empty.
Output
Print a single integer — the minimum number of clicks.
Examples
Input
snow affects sports such as skiing, snowboarding, and snowmachine travel.
snowboarding is a recreational activity and olympic and paralympic sport.
Output
141
Input
'co-co-co, codeforces?!'
Output
25
Input
thun-thun-thunder, thunder, thunder
thunder, thun-, thunder
thun-thun-thunder, thunder
thunder, feel the thunder
lightning then the thunder
thunder, feel the thunder
lightning then the thunder
thunder, thunder
Output
183
Note
In sample case one it's optimal to use autocompletion for the first instance of «snowboarding» after typing up «sn» and for the second instance of «snowboarding» after typing up «snowb». This will save 7 clicks.
In sample case two it doesn't matter whether to use autocompletion or not.
Submitted Solution:
```
import fileinput
words_stack = dict()
words = list()
def get_similar(word):
was_new = False
end = False
count = 0
need_write = 0
new_word_count = 0
for i in range(1,len(word) + 1):
little_word = word[0:i]
if not words_stack.get(little_word):
if i == len(word):
words_stack[little_word] = 1
else:
words_stack[little_word] = 2
new_word_count += 1
if not was_new:
for j in range(1, i):
little_word = word[0:j]
words_stack[little_word] = 3
was_new = True
else:
number_word = words_stack[little_word]
if number_word == 1:
end = True
count += 1
elif number_word == 2:
count += 1
else:
need_write += 1
if end:
return (new_word_count + 2 + need_write) if count >= 2 else (new_word_count + count + need_write)
else:
return new_word_count + count + need_write
answer = 0
word = str("")
prep = str("")
for line in fileinput.input():
for char in list(line):
if char in ["'", ',', ' ', '\n', '.', '-', '!', '?']:
plus = get_similar(word)
answer += plus
word = ""
prep += char
else:
plus = get_similar(prep)
answer += plus
prep = ""
word += str(char)
answer += get_similar(prep)
answer += get_similar(word)
print(answer)
```
No
| 97,568
|
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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.
Arcady is a copywriter. His today's task is to type up an already well-designed story using his favorite text editor.
Arcady types words, punctuation signs and spaces one after another. Each letter and each sign (including line feed) requires one keyboard click in order to be printed. Moreover, when Arcady has a non-empty prefix of some word on the screen, the editor proposes a possible autocompletion for this word, more precisely one of the already printed words such that its prefix matches the currently printed prefix if this word is unique. For example, if Arcady has already printed «codeforces», «coding» and «codeforces» once again, then there will be no autocompletion attempt for «cod», but if he proceeds with «code», the editor will propose «codeforces».
With a single click Arcady can follow the editor's proposal, i.e. to transform the current prefix to it. Note that no additional symbols are printed after the autocompletion (no spaces, line feeds, etc). What is the minimum number of keyboard clicks Arcady has to perform to print the entire text, if he is not allowed to move the cursor or erase the already printed symbols?
A word here is a contiguous sequence of latin letters bordered by spaces, punctuation signs and line/text beginnings/ends. Arcady uses only lowercase letters. For example, there are 20 words in «it's well-known that tic-tac-toe is a paper-and-pencil game for two players, x and o.».
Input
The only line contains Arcady's text, consisting only of lowercase latin letters, spaces, line feeds and the following punctuation signs: «.», «,», «?», «!», «'» and «-». The total amount of symbols doesn't exceed 3·105. It's guaranteed that all lines are non-empty.
Output
Print a single integer — the minimum number of clicks.
Examples
Input
snow affects sports such as skiing, snowboarding, and snowmachine travel.
snowboarding is a recreational activity and olympic and paralympic sport.
Output
141
Input
'co-co-co, codeforces?!'
Output
25
Input
thun-thun-thunder, thunder, thunder
thunder, thun-, thunder
thun-thun-thunder, thunder
thunder, feel the thunder
lightning then the thunder
thunder, feel the thunder
lightning then the thunder
thunder, thunder
Output
183
Note
In sample case one it's optimal to use autocompletion for the first instance of «snowboarding» after typing up «sn» and for the second instance of «snowboarding» after typing up «snowb». This will save 7 clicks.
In sample case two it doesn't matter whether to use autocompletion or not.
Submitted Solution:
```
import sys
def next_word_start(str, beg):
for i in range(beg, len(str)):
if str[i] in punctuation:
return i
return len(str)
def was_semi_typed(words, lookup):
max_size = 0
res = ""
for word in words:
similarity = 0
if len(lookup) < len(word):
continue
for i in range(len(word)):
if word[i] == lookup[i]:
similarity += 1
if max_size < similarity and i == len(word) - 1:
max_size = similarity
res = word
else:
break
return res
prefixes = set()
punctuation = ['.', ',', '?', '-', '!', '\'', ' ', '\n']
inp = sys.stdin.readlines()
data = ""
for lines in inp:
data += lines.title().lower()
words = set()
non_unique_prefixes = set()
result = 0
i = 0
last_word_end = -1
while i < len(data):
word_ended = data[i] in punctuation
if word_ended:
words.add(data[last_word_end + 1 : i])
last_word_end = i
# we have printed a punt mark
result += 1
i += 1
else:
current_prefix = data[last_word_end + 1 : i + 1]
if current_prefix in non_unique_prefixes:
# if it's in non unique, we need to continue typing letters
result += 1
i += 1
continue
if not (current_prefix in prefixes):
prefixes.add(current_prefix)
result += 1
i += 1
else:
# seems to be we have this word. lookup front to know what the word is...
next_space = next_word_start(data, last_word_end + 1)
lookup = data[last_word_end + 1 : next_space]
# need to know if this word is part of smth. E.g: we can suggest "test", but user printed "tested".
semi_typed = was_semi_typed(words, lookup)
suggestion_size = len(was_semi_typed(words, lookup))
if semi_typed in words and semi_typed != '' and current_prefix != semi_typed:
result += 2 # +1 because we printed a new letter, +1 because we accept hint
append = len(lookup) - suggestion_size
# внутри надо удалить префиксы слова semi_typed и добавить новый
# например. Мы написали слова thun, затем по букве t предлагаем ввести "thun". Если пользователь принял
# подсказку и дополнил её чем-то, например, "thunder", то нельзя реагировать на t, th, thu, thun
# (добавить их в список non-unique и удалить из unique(prefixes). При этом в unique добавить thund,
# как новый префикс для реагирования
if append > 0:
for j in range(len(semi_typed)):
if semi_typed[:j + 1] in prefixes:
prefixes.remove(semi_typed[:j + 1])
non_unique_prefixes.add(semi_typed[:j + 1])
# добавляем все уникальные префиксы нашего слова
for k in range(len(lookup)):
if not (lookup[:len(semi_typed) + k] in non_unique_prefixes):
prefixes.add(lookup[:len(semi_typed) + k])
# добавляем наше новое слово в словарь:)
words.add(lookup)
result += append # problem is here. Hopefully fixed
i = next_space # todo
last_word_end = i
else:
prefixes.remove(current_prefix)
non_unique_prefixes.add(current_prefix)
i += 1
result += 1
print(result)
```
No
| 97,569
|
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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.
Arcady is a copywriter. His today's task is to type up an already well-designed story using his favorite text editor.
Arcady types words, punctuation signs and spaces one after another. Each letter and each sign (including line feed) requires one keyboard click in order to be printed. Moreover, when Arcady has a non-empty prefix of some word on the screen, the editor proposes a possible autocompletion for this word, more precisely one of the already printed words such that its prefix matches the currently printed prefix if this word is unique. For example, if Arcady has already printed «codeforces», «coding» and «codeforces» once again, then there will be no autocompletion attempt for «cod», but if he proceeds with «code», the editor will propose «codeforces».
With a single click Arcady can follow the editor's proposal, i.e. to transform the current prefix to it. Note that no additional symbols are printed after the autocompletion (no spaces, line feeds, etc). What is the minimum number of keyboard clicks Arcady has to perform to print the entire text, if he is not allowed to move the cursor or erase the already printed symbols?
A word here is a contiguous sequence of latin letters bordered by spaces, punctuation signs and line/text beginnings/ends. Arcady uses only lowercase letters. For example, there are 20 words in «it's well-known that tic-tac-toe is a paper-and-pencil game for two players, x and o.».
Input
The only line contains Arcady's text, consisting only of lowercase latin letters, spaces, line feeds and the following punctuation signs: «.», «,», «?», «!», «'» and «-». The total amount of symbols doesn't exceed 3·105. It's guaranteed that all lines are non-empty.
Output
Print a single integer — the minimum number of clicks.
Examples
Input
snow affects sports such as skiing, snowboarding, and snowmachine travel.
snowboarding is a recreational activity and olympic and paralympic sport.
Output
141
Input
'co-co-co, codeforces?!'
Output
25
Input
thun-thun-thunder, thunder, thunder
thunder, thun-, thunder
thun-thun-thunder, thunder
thunder, feel the thunder
lightning then the thunder
thunder, feel the thunder
lightning then the thunder
thunder, thunder
Output
183
Note
In sample case one it's optimal to use autocompletion for the first instance of «snowboarding» after typing up «sn» and for the second instance of «snowboarding» after typing up «snowb». This will save 7 clicks.
In sample case two it doesn't matter whether to use autocompletion or not.
Submitted Solution:
```
import sys
def read_text():
text = ''
for line in sys.stdin:
text += line
return text
def matching_word(word, bor, symbol, search):
if symbol in search:
search = search[symbol]
word_found = 'size' in search and search['size'] == 1
return get_match(word, bor) if word_found else 0, search
return 0, ()
def contains_word(word, bor):
search = bor
for symbol in word:
if symbol in search:
search = search[symbol]
else:
return False
return len(search.keys()) > 0
def get_match(word, bor):
search = bor
match = ''
for symbol in word:
match += symbol
search = search[symbol]
while len(search.keys()) == 2:
symbol = next(filter(lambda item: item != 'size', search.keys()))
match += symbol
search = search[symbol]
return match
def add_to_bor(word, bor):
search = bor
for symbol in word:
if symbol not in search:
search[symbol] = dict([('size', 0)])
search = search[symbol]
search['size'] += 1
def replace_index(text, start, match):
index = start
for symbol in match:
if symbol == text[index]:
index += 1
else:
return -1
return start + len(match) - 1
text = list(read_text())
text_size = len(text)
bor = dict()
separators = ['.', ',', '?', '!', '\'', '-', ' ', '\n']
typed = 0
index = 0
word = ''
search = bor
while index < text_size:
symbol = text[index]
typed += 1
if symbol not in separators:
word += symbol
match, search = matching_word(word, bor, symbol, search)
if match != 0 and match != word:
new_index = replace_index(text, index + 1 - len(word), match)
if new_index != -1:
typed += 1
index = new_index
word = match
elif len(word) > 0:
if not contains_word(word, bor):
add_to_bor(word, bor)
search = bor
word = ''
index += 1
print(typed)
```
No
| 97,570
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given a text consisting of n space-separated words. There is exactly one space character between any pair of adjacent words. There are no spaces before the first word and no spaces after the last word. The length of text is the number of letters and spaces in it. w_i is the i-th word of text. All words consist only of lowercase Latin letters.
Let's denote a segment of words w[i..j] as a sequence of words w_i, w_{i + 1}, ..., w_j. Two segments of words w[i_1 .. j_1] and w[i_2 .. j_2] are considered equal if j_1 - i_1 = j_2 - i_2, j_1 ≥ i_1, j_2 ≥ i_2, and for every t ∈ [0, j_1 - i_1] w_{i_1 + t} = w_{i_2 + t}. For example, for the text "to be or not to be" the segments w[1..2] and w[5..6] are equal, they correspond to the words "to be".
An abbreviation is a replacement of some segments of words with their first uppercase letters. In order to perform an abbreviation, you have to choose at least two non-intersecting equal segments of words, and replace each chosen segment with the string consisting of first letters of the words in the segment (written in uppercase). For example, for the text "a ab a a b ab a a b c" you can replace segments of words w[2..4] and w[6..8] with an abbreviation "AAA" and obtain the text "a AAA b AAA b c", or you can replace segments of words w[2..5] and w[6..9] with an abbreviation "AAAB" and obtain the text "a AAAB AAAB c".
What is the minimum length of the text after at most one abbreviation?
Input
The first line of the input contains one integer n (1 ≤ n ≤ 300) — the number of words in the text.
The next line contains n space-separated words of the text w_1, w_2, ..., w_n. Each word consists only of lowercase Latin letters.
It is guaranteed that the length of text does not exceed 10^5.
Output
Print one integer — the minimum length of the text after at most one abbreviation.
Examples
Input
6
to be or not to be
Output
12
Input
10
a ab a a b ab a a b c
Output
13
Input
6
aa bb aa aa bb bb
Output
11
Note
In the first example you can obtain the text "TB or not TB".
In the second example you can obtain the text "a AAAB AAAB c".
In the third example you can obtain the text "AB aa AB bb".
Tags: dp, hashing, strings
Correct Solution:
```
import math
from collections import defaultdict
def main():
p = 31
m = 1e9 + 9
def string_hash(s):
hash_value = 0
p_pow = 1
for c in s:
hash_value = (hash_value + (ord(c)-ord('a')+1) * p_pow) % m
p_pow = (p_pow * p) % m
return hash_value
n = int(input())
words = input().split()
eq = [[False] * n for _ in range(n)]
for i in range(n):
for j in range(n):
if i == j:
eq[i][j] = eq[j][i] = True
else:
eq[i][j] = eq[i][j] = words[i] == words[j]
dp = [[0 for _ in range(n)] for _ in range(n)]
for i in range(n-1, -1, -1):
for j in range(n-1, -1, -1):
if not eq[i][j]:
dp[i][j] = 0
else:
if i < n-1 and j < n-1:
dp[i][j] = dp[i+1][j+1] + 1
else:
dp[i][j] = 1
all = sum(len(w) for w in words) + n-1
ans = all
for start in range(n):
size = 1
while start + size < n:
num = 1
pos = start + size
while pos + size <= n:
if dp[start][pos] >= size:
num += 1
pos += size
else:
pos += 1
if num > 1:
segsize = sum(len(words[i]) for i in range(start, start+size)) + size-1
newsize = size
ans = min(ans, all - num * segsize + num * newsize)
size += 1
print(ans)
if __name__ == '__main__':
main()
```
| 97,821
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given a text consisting of n space-separated words. There is exactly one space character between any pair of adjacent words. There are no spaces before the first word and no spaces after the last word. The length of text is the number of letters and spaces in it. w_i is the i-th word of text. All words consist only of lowercase Latin letters.
Let's denote a segment of words w[i..j] as a sequence of words w_i, w_{i + 1}, ..., w_j. Two segments of words w[i_1 .. j_1] and w[i_2 .. j_2] are considered equal if j_1 - i_1 = j_2 - i_2, j_1 ≥ i_1, j_2 ≥ i_2, and for every t ∈ [0, j_1 - i_1] w_{i_1 + t} = w_{i_2 + t}. For example, for the text "to be or not to be" the segments w[1..2] and w[5..6] are equal, they correspond to the words "to be".
An abbreviation is a replacement of some segments of words with their first uppercase letters. In order to perform an abbreviation, you have to choose at least two non-intersecting equal segments of words, and replace each chosen segment with the string consisting of first letters of the words in the segment (written in uppercase). For example, for the text "a ab a a b ab a a b c" you can replace segments of words w[2..4] and w[6..8] with an abbreviation "AAA" and obtain the text "a AAA b AAA b c", or you can replace segments of words w[2..5] and w[6..9] with an abbreviation "AAAB" and obtain the text "a AAAB AAAB c".
What is the minimum length of the text after at most one abbreviation?
Input
The first line of the input contains one integer n (1 ≤ n ≤ 300) — the number of words in the text.
The next line contains n space-separated words of the text w_1, w_2, ..., w_n. Each word consists only of lowercase Latin letters.
It is guaranteed that the length of text does not exceed 10^5.
Output
Print one integer — the minimum length of the text after at most one abbreviation.
Examples
Input
6
to be or not to be
Output
12
Input
10
a ab a a b ab a a b c
Output
13
Input
6
aa bb aa aa bb bb
Output
11
Note
In the first example you can obtain the text "TB or not TB".
In the second example you can obtain the text "a AAAB AAAB c".
In the third example you can obtain the text "AB aa AB bb".
Tags: dp, hashing, strings
Correct Solution:
```
n = int(input())
arr = input()
final = len(arr)
arr = arr.split()
lens = [0 for x in range(n)]
visit = [0 for x in range(n)]
cnt = 0
ans = 0
for i in range(n):
if visit[i]:
continue
lens[cnt] = len(arr[i])
for j in range(i+1,n):
if arr[j]==arr[i]:
arr[j] = cnt
visit[j] = 1
arr[i] = cnt
cnt += 1
for i in range(n):
for j in range(i,n):
temp = arr[i:j+1]
ind = 1
found = 0
len2 = j-i+1
cur = 0
kmp = [0 for x in range(len2)]
while ind < len2:
if temp[ind] == temp[cur]:
cur += 1
kmp[ind] = cur
ind += 1
else:
if cur != 0:
cur -= 1
else:
kmp[ind] = 0
ind += 1
ind = 0
cur = 0
while ind < n:
if arr[ind] == temp[cur]:
ind += 1
cur += 1
if cur == len2:
found += 1
cur = 0
elif ind < n and temp[cur] != arr[ind]:
if cur != 0:
cur = kmp[cur-1]
else:
ind += 1
if found>1:
res = 0
for k in temp:
res += (lens[k]-1)*(found)
res += (len(temp)-1)*(found)
ans = max(ans,res)
print(final-ans)
```
| 97,822
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given a text consisting of n space-separated words. There is exactly one space character between any pair of adjacent words. There are no spaces before the first word and no spaces after the last word. The length of text is the number of letters and spaces in it. w_i is the i-th word of text. All words consist only of lowercase Latin letters.
Let's denote a segment of words w[i..j] as a sequence of words w_i, w_{i + 1}, ..., w_j. Two segments of words w[i_1 .. j_1] and w[i_2 .. j_2] are considered equal if j_1 - i_1 = j_2 - i_2, j_1 ≥ i_1, j_2 ≥ i_2, and for every t ∈ [0, j_1 - i_1] w_{i_1 + t} = w_{i_2 + t}. For example, for the text "to be or not to be" the segments w[1..2] and w[5..6] are equal, they correspond to the words "to be".
An abbreviation is a replacement of some segments of words with their first uppercase letters. In order to perform an abbreviation, you have to choose at least two non-intersecting equal segments of words, and replace each chosen segment with the string consisting of first letters of the words in the segment (written in uppercase). For example, for the text "a ab a a b ab a a b c" you can replace segments of words w[2..4] and w[6..8] with an abbreviation "AAA" and obtain the text "a AAA b AAA b c", or you can replace segments of words w[2..5] and w[6..9] with an abbreviation "AAAB" and obtain the text "a AAAB AAAB c".
What is the minimum length of the text after at most one abbreviation?
Input
The first line of the input contains one integer n (1 ≤ n ≤ 300) — the number of words in the text.
The next line contains n space-separated words of the text w_1, w_2, ..., w_n. Each word consists only of lowercase Latin letters.
It is guaranteed that the length of text does not exceed 10^5.
Output
Print one integer — the minimum length of the text after at most one abbreviation.
Examples
Input
6
to be or not to be
Output
12
Input
10
a ab a a b ab a a b c
Output
13
Input
6
aa bb aa aa bb bb
Output
11
Note
In the first example you can obtain the text "TB or not TB".
In the second example you can obtain the text "a AAAB AAAB c".
In the third example you can obtain the text "AB aa AB bb".
Tags: dp, hashing, strings
Correct Solution:
```
n = int(input())
s = input()
a = list(s.split())
eq = [[0 for i in range(n)] for j in range(n)]
dp = [[0 for i in range(n)] for j in range(n)]
for i in range(n):
eq[i][i] = 1
for j in range(0, i):
if a[i] == a[j]:
eq[i][j] += 1
eq[j][i] += 1
for i in range(n - 1, -1, -1):
for j in range(n - 1, -1, -1):
if eq[i][j] == 1:
if i < n - 1 and j < n - 1:
dp[i][j] = dp[i + 1][j + 1] + 1
else:
dp[i][j] = 1
allsum = n - 1
for k in a:
allsum += len(k)
ans = allsum
for i in range(n):
sx = 0
j = 0
while i + j < n:
sx += len(a[i + j])
cnt = 1
pos = i + j + 1
while pos < n:
if dp[i][pos] > j:
cnt += 1
pos += j
pos += 1
cur = allsum - sx*cnt + (j + 1)*cnt - j*cnt
if cnt > 1 and ans > cur:
ans = cur
j += 1
print(ans)
```
| 97,823
|
[
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given a text consisting of n space-separated words. There is exactly one space character between any pair of adjacent words. There are no spaces before the first word and no spaces after the last word. The length of text is the number of letters and spaces in it. w_i is the i-th word of text. All words consist only of lowercase Latin letters.
Let's denote a segment of words w[i..j] as a sequence of words w_i, w_{i + 1}, ..., w_j. Two segments of words w[i_1 .. j_1] and w[i_2 .. j_2] are considered equal if j_1 - i_1 = j_2 - i_2, j_1 ≥ i_1, j_2 ≥ i_2, and for every t ∈ [0, j_1 - i_1] w_{i_1 + t} = w_{i_2 + t}. For example, for the text "to be or not to be" the segments w[1..2] and w[5..6] are equal, they correspond to the words "to be".
An abbreviation is a replacement of some segments of words with their first uppercase letters. In order to perform an abbreviation, you have to choose at least two non-intersecting equal segments of words, and replace each chosen segment with the string consisting of first letters of the words in the segment (written in uppercase). For example, for the text "a ab a a b ab a a b c" you can replace segments of words w[2..4] and w[6..8] with an abbreviation "AAA" and obtain the text "a AAA b AAA b c", or you can replace segments of words w[2..5] and w[6..9] with an abbreviation "AAAB" and obtain the text "a AAAB AAAB c".
What is the minimum length of the text after at most one abbreviation?
Input
The first line of the input contains one integer n (1 ≤ n ≤ 300) — the number of words in the text.
The next line contains n space-separated words of the text w_1, w_2, ..., w_n. Each word consists only of lowercase Latin letters.
It is guaranteed that the length of text does not exceed 10^5.
Output
Print one integer — the minimum length of the text after at most one abbreviation.
Examples
Input
6
to be or not to be
Output
12
Input
10
a ab a a b ab a a b c
Output
13
Input
6
aa bb aa aa bb bb
Output
11
Note
In the first example you can obtain the text "TB or not TB".
In the second example you can obtain the text "a AAAB AAAB c".
In the third example you can obtain the text "AB aa AB bb".
Tags: dp, hashing, strings
Correct Solution:
```
# import time
N = 303
eq = []
dp = []
for i in range(N):
eq.append([False] * N)
for i in range(N):
dp.append([0] * N)
n = int(input())
s = input()
# t = time.time()
allsum = len(s)
s = s.split()
for i in range(n):
eq[i][i] = True
for j in range(i):
eq[i][j] = eq[j][i] = s[i] == s[j]
for i in range(n - 1, -1, -1):
for j in range(n - 1, -1, -1):
if eq[i][j]:
if i < n - 1 and j < n - 1:
dp[i][j] = dp[i + 1][j + 1] + 1
else:
dp[i][j] = 1
ans = allsum
for i in range(n):
su = 0
for j in range(1, n - i + 1):
su += len(s[i + j - 1])
cnt = 1
pos = i + j
while pos < n:
if dp[i][pos] >= j:
cnt += 1
pos += j - 1
pos += 1
cur = allsum - su * cnt + cnt
if cnt > 1 and ans > cur:
# print(allsum, su, cnt, j)
ans = cur
print(ans)
# print(time.time() - t)
```
| 97,824
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given a text consisting of n space-separated words. There is exactly one space character between any pair of adjacent words. There are no spaces before the first word and no spaces after the last word. The length of text is the number of letters and spaces in it. w_i is the i-th word of text. All words consist only of lowercase Latin letters.
Let's denote a segment of words w[i..j] as a sequence of words w_i, w_{i + 1}, ..., w_j. Two segments of words w[i_1 .. j_1] and w[i_2 .. j_2] are considered equal if j_1 - i_1 = j_2 - i_2, j_1 ≥ i_1, j_2 ≥ i_2, and for every t ∈ [0, j_1 - i_1] w_{i_1 + t} = w_{i_2 + t}. For example, for the text "to be or not to be" the segments w[1..2] and w[5..6] are equal, they correspond to the words "to be".
An abbreviation is a replacement of some segments of words with their first uppercase letters. In order to perform an abbreviation, you have to choose at least two non-intersecting equal segments of words, and replace each chosen segment with the string consisting of first letters of the words in the segment (written in uppercase). For example, for the text "a ab a a b ab a a b c" you can replace segments of words w[2..4] and w[6..8] with an abbreviation "AAA" and obtain the text "a AAA b AAA b c", or you can replace segments of words w[2..5] and w[6..9] with an abbreviation "AAAB" and obtain the text "a AAAB AAAB c".
What is the minimum length of the text after at most one abbreviation?
Input
The first line of the input contains one integer n (1 ≤ n ≤ 300) — the number of words in the text.
The next line contains n space-separated words of the text w_1, w_2, ..., w_n. Each word consists only of lowercase Latin letters.
It is guaranteed that the length of text does not exceed 10^5.
Output
Print one integer — the minimum length of the text after at most one abbreviation.
Examples
Input
6
to be or not to be
Output
12
Input
10
a ab a a b ab a a b c
Output
13
Input
6
aa bb aa aa bb bb
Output
11
Note
In the first example you can obtain the text "TB or not TB".
In the second example you can obtain the text "a AAAB AAAB c".
In the third example you can obtain the text "AB aa AB bb".
Tags: dp, hashing, strings
Correct Solution:
```
# import time
N = 303
eq = []
dp = []
for i in range(N):
eq.append([False] * N)
for i in range(N):
dp.append([0] * N)
n = int(input())
s = input()
# t = time.time()
allsum = len(s)
s = s.split()
for i in range(n):
eq[i][i] = True
for j in range(i):
eq[i][j] = eq[j][i] = s[i] == s[j]
for i in range(n - 1, -1, -1):
for j in range(n - 1, -1, -1):
if eq[i][j]:
if i < n - 1 and j < n - 1:
dp[i][j] = dp[i + 1][j + 1] + 1
else:
dp[i][j] = 1
ans = allsum
for i in range(n):
su = 0
for j in range(n - i):
su += len(s[i + j])
cnt = 1
pos = i + j + 1
while pos < n:
if dp[i][pos] > j:
cnt += 1
pos += j
pos += 1
cur = allsum - su * cnt + (j + 1) * cnt - j * cnt
if cnt > 1 and ans > cur:
# print(allsum, su, cnt, j)
ans = cur
print(ans)
# print(time.time() - t)
```
| 97,825
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given a text consisting of n space-separated words. There is exactly one space character between any pair of adjacent words. There are no spaces before the first word and no spaces after the last word. The length of text is the number of letters and spaces in it. w_i is the i-th word of text. All words consist only of lowercase Latin letters.
Let's denote a segment of words w[i..j] as a sequence of words w_i, w_{i + 1}, ..., w_j. Two segments of words w[i_1 .. j_1] and w[i_2 .. j_2] are considered equal if j_1 - i_1 = j_2 - i_2, j_1 ≥ i_1, j_2 ≥ i_2, and for every t ∈ [0, j_1 - i_1] w_{i_1 + t} = w_{i_2 + t}. For example, for the text "to be or not to be" the segments w[1..2] and w[5..6] are equal, they correspond to the words "to be".
An abbreviation is a replacement of some segments of words with their first uppercase letters. In order to perform an abbreviation, you have to choose at least two non-intersecting equal segments of words, and replace each chosen segment with the string consisting of first letters of the words in the segment (written in uppercase). For example, for the text "a ab a a b ab a a b c" you can replace segments of words w[2..4] and w[6..8] with an abbreviation "AAA" and obtain the text "a AAA b AAA b c", or you can replace segments of words w[2..5] and w[6..9] with an abbreviation "AAAB" and obtain the text "a AAAB AAAB c".
What is the minimum length of the text after at most one abbreviation?
Input
The first line of the input contains one integer n (1 ≤ n ≤ 300) — the number of words in the text.
The next line contains n space-separated words of the text w_1, w_2, ..., w_n. Each word consists only of lowercase Latin letters.
It is guaranteed that the length of text does not exceed 10^5.
Output
Print one integer — the minimum length of the text after at most one abbreviation.
Examples
Input
6
to be or not to be
Output
12
Input
10
a ab a a b ab a a b c
Output
13
Input
6
aa bb aa aa bb bb
Output
11
Note
In the first example you can obtain the text "TB or not TB".
In the second example you can obtain the text "a AAAB AAAB c".
In the third example you can obtain the text "AB aa AB bb".
Tags: dp, hashing, strings
Correct Solution:
```
from sys import stdin
def kmp(pat, txt):
leng = 0;i = 1
ans=0
M = len(pat) ;N = len(txt) ;lps = [0]*M ;j = 0
#Calculo de lps, prefifo propio mas largo que tambien es sufijo de pat[0:i]
while i < M:
if pat[i]== pat[leng]:
leng += 1
lps[i] = leng
i += 1
elif leng != 0:
leng = lps[leng-1]
else:
lps[i] = 0
i += 1
i = 0
while i < N:
if pat[j] == txt[i]:
i += 1;j += 1
if j == M:
if ((i-j)==0 or txt[i-j-1]==" ") and ((i-j+len(pat))==(len(txt)) or txt[i-j+len(pat)]==" "):
ans+=1
i=i-j+len(pat)
j =0
else:
j = lps[j-1]
elif i < N and pat[j] != txt[i]:
if j != 0:
j = lps[j-1]
else:
i += 1
return ans
n=int(stdin.readline().strip())
s1=stdin.readline().strip().split()
s=[]
x=1
d=dict()
d1=dict()
st=set()
ans=n-1
s2=""
for i in s1:
ans+=len(i)
if i not in st:
d.update({i:x})
d1.update({x:len(i)})
x+=1
st.add(i)
s.append(d[i])
s2+=str(d[i])
if len(s)<n:
s2+=" "
acum=0
s3=s2.split()
tot=ans
for i in range(n):
x=0
y=0
for j in range(i,n):
x+=(d1[s[j]]-1)
y+=len(s3[j])
z=kmp(s2[acum:acum+y+j-i],s2)
if z>1:
aux=tot-(z*(x+j-i))
#print(s2[acum:acum+y+j-i],"/ ",aux,acum,y,j-i)
if aux<ans:
#print(s2[acum:acum+y+j-i+1],"/ ",aux)
ans=aux
acum+=len(s3[i])+1
print(ans)
```
| 97,826
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given a text consisting of n space-separated words. There is exactly one space character between any pair of adjacent words. There are no spaces before the first word and no spaces after the last word. The length of text is the number of letters and spaces in it. w_i is the i-th word of text. All words consist only of lowercase Latin letters.
Let's denote a segment of words w[i..j] as a sequence of words w_i, w_{i + 1}, ..., w_j. Two segments of words w[i_1 .. j_1] and w[i_2 .. j_2] are considered equal if j_1 - i_1 = j_2 - i_2, j_1 ≥ i_1, j_2 ≥ i_2, and for every t ∈ [0, j_1 - i_1] w_{i_1 + t} = w_{i_2 + t}. For example, for the text "to be or not to be" the segments w[1..2] and w[5..6] are equal, they correspond to the words "to be".
An abbreviation is a replacement of some segments of words with their first uppercase letters. In order to perform an abbreviation, you have to choose at least two non-intersecting equal segments of words, and replace each chosen segment with the string consisting of first letters of the words in the segment (written in uppercase). For example, for the text "a ab a a b ab a a b c" you can replace segments of words w[2..4] and w[6..8] with an abbreviation "AAA" and obtain the text "a AAA b AAA b c", or you can replace segments of words w[2..5] and w[6..9] with an abbreviation "AAAB" and obtain the text "a AAAB AAAB c".
What is the minimum length of the text after at most one abbreviation?
Input
The first line of the input contains one integer n (1 ≤ n ≤ 300) — the number of words in the text.
The next line contains n space-separated words of the text w_1, w_2, ..., w_n. Each word consists only of lowercase Latin letters.
It is guaranteed that the length of text does not exceed 10^5.
Output
Print one integer — the minimum length of the text after at most one abbreviation.
Examples
Input
6
to be or not to be
Output
12
Input
10
a ab a a b ab a a b c
Output
13
Input
6
aa bb aa aa bb bb
Output
11
Note
In the first example you can obtain the text "TB or not TB".
In the second example you can obtain the text "a AAAB AAAB c".
In the third example you can obtain the text "AB aa AB bb".
Tags: dp, hashing, strings
Correct Solution:
```
import sys
input = sys.stdin.readline
n = int(input())
s = input()
a = list(s.split())
eq = [[0 for i in range(n)] for j in range(n)]
dp = [[0 for i in range(n)] for j in range(n)]
for i in range(n):
eq[i][i] = 1
for j in range(0, i):
if a[i] == a[j]:
eq[i][j] += 1
eq[j][i] += 1
for i in range(n - 1, -1, -1):
for j in range(n - 1, -1, -1):
if eq[i][j] == 1:
if i < n - 1 and j < n - 1:
dp[i][j] = dp[i + 1][j + 1] + 1
else:
dp[i][j] = 1
allsum = n - 1
for k in a:
allsum += len(k)
ans = allsum
for i in range(n):
sx = 0
j = 0
while i + j < n:
sx += len(a[i + j])
cnt = 1
pos = i + j + 1
while pos < n:
if dp[i][pos] > j:
cnt += 1
pos += j
pos += 1
cur = allsum - sx*cnt + (j + 1)*cnt - j*cnt
if cnt > 1 and ans > cur:
ans = cur
j += 1
print(ans)
```
| 97,827
|
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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 a text consisting of n space-separated words. There is exactly one space character between any pair of adjacent words. There are no spaces before the first word and no spaces after the last word. The length of text is the number of letters and spaces in it. w_i is the i-th word of text. All words consist only of lowercase Latin letters.
Let's denote a segment of words w[i..j] as a sequence of words w_i, w_{i + 1}, ..., w_j. Two segments of words w[i_1 .. j_1] and w[i_2 .. j_2] are considered equal if j_1 - i_1 = j_2 - i_2, j_1 ≥ i_1, j_2 ≥ i_2, and for every t ∈ [0, j_1 - i_1] w_{i_1 + t} = w_{i_2 + t}. For example, for the text "to be or not to be" the segments w[1..2] and w[5..6] are equal, they correspond to the words "to be".
An abbreviation is a replacement of some segments of words with their first uppercase letters. In order to perform an abbreviation, you have to choose at least two non-intersecting equal segments of words, and replace each chosen segment with the string consisting of first letters of the words in the segment (written in uppercase). For example, for the text "a ab a a b ab a a b c" you can replace segments of words w[2..4] and w[6..8] with an abbreviation "AAA" and obtain the text "a AAA b AAA b c", or you can replace segments of words w[2..5] and w[6..9] with an abbreviation "AAAB" and obtain the text "a AAAB AAAB c".
What is the minimum length of the text after at most one abbreviation?
Input
The first line of the input contains one integer n (1 ≤ n ≤ 300) — the number of words in the text.
The next line contains n space-separated words of the text w_1, w_2, ..., w_n. Each word consists only of lowercase Latin letters.
It is guaranteed that the length of text does not exceed 10^5.
Output
Print one integer — the minimum length of the text after at most one abbreviation.
Examples
Input
6
to be or not to be
Output
12
Input
10
a ab a a b ab a a b c
Output
13
Input
6
aa bb aa aa bb bb
Output
11
Note
In the first example you can obtain the text "TB or not TB".
In the second example you can obtain the text "a AAAB AAAB c".
In the third example you can obtain the text "AB aa AB bb".
Submitted Solution:
```
n = int(input())
arr = input()
final = len(arr)
arr = arr.split()
lens = [0 for x in range(n)]
visit = [0 for x in range(n)]
cnt = 0
ans = 0
for i in range(n):
if visit[i]:
continue
lens[cnt] = len(arr[i])
for j in range(i+1,n):
if arr[j]==arr[i]:
arr[j] = cnt
visit[j] = 1
arr[i] = cnt
cnt += 1
for i in range(n):
for j in range(i,n):
temp = arr[i:j+1]
ind = j+1
need = len(temp)
found = 0
while ind < n:
if arr[ind]==temp[0]:
cnt = 0
while ind+cnt < n:
if arr[ind+cnt]==temp[cnt]:
cnt += 1
else:
break
if cnt==need:
found += 1
break
ind += cnt
continue
ind += 1
if found:
res = 0
for k in temp:
res += (lens[k]-1)*(found+1)
res += (len(temp)-1)*(found+1)
ans = max(ans,res)
print(final-ans)
```
No
| 97,828
|
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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 a text consisting of n space-separated words. There is exactly one space character between any pair of adjacent words. There are no spaces before the first word and no spaces after the last word. The length of text is the number of letters and spaces in it. w_i is the i-th word of text. All words consist only of lowercase Latin letters.
Let's denote a segment of words w[i..j] as a sequence of words w_i, w_{i + 1}, ..., w_j. Two segments of words w[i_1 .. j_1] and w[i_2 .. j_2] are considered equal if j_1 - i_1 = j_2 - i_2, j_1 ≥ i_1, j_2 ≥ i_2, and for every t ∈ [0, j_1 - i_1] w_{i_1 + t} = w_{i_2 + t}. For example, for the text "to be or not to be" the segments w[1..2] and w[5..6] are equal, they correspond to the words "to be".
An abbreviation is a replacement of some segments of words with their first uppercase letters. In order to perform an abbreviation, you have to choose at least two non-intersecting equal segments of words, and replace each chosen segment with the string consisting of first letters of the words in the segment (written in uppercase). For example, for the text "a ab a a b ab a a b c" you can replace segments of words w[2..4] and w[6..8] with an abbreviation "AAA" and obtain the text "a AAA b AAA b c", or you can replace segments of words w[2..5] and w[6..9] with an abbreviation "AAAB" and obtain the text "a AAAB AAAB c".
What is the minimum length of the text after at most one abbreviation?
Input
The first line of the input contains one integer n (1 ≤ n ≤ 300) — the number of words in the text.
The next line contains n space-separated words of the text w_1, w_2, ..., w_n. Each word consists only of lowercase Latin letters.
It is guaranteed that the length of text does not exceed 10^5.
Output
Print one integer — the minimum length of the text after at most one abbreviation.
Examples
Input
6
to be or not to be
Output
12
Input
10
a ab a a b ab a a b c
Output
13
Input
6
aa bb aa aa bb bb
Output
11
Note
In the first example you can obtain the text "TB or not TB".
In the second example you can obtain the text "a AAAB AAAB c".
In the third example you can obtain the text "AB aa AB bb".
Submitted Solution:
```
n=int(input())
s=input().split()
flag=[[s[i]!=s[j] for j in range(n)]for i in range(n)]
b=[0]+[len(i)-1 for i in s]
for i in range(n):b[i+1]+=b[i]
ans=0
for i in range(n-1):
for j in range(i+1,n):
t=min(j-i,n-j)
for k in range(t):
if flag[i+k][j+k]:
break
if k:
ans=max(ans,b[i+k+1]-b[i]+k)
print(((b[n]+n)+(n-1))-ans*2)
```
No
| 97,829
|
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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 a text consisting of n space-separated words. There is exactly one space character between any pair of adjacent words. There are no spaces before the first word and no spaces after the last word. The length of text is the number of letters and spaces in it. w_i is the i-th word of text. All words consist only of lowercase Latin letters.
Let's denote a segment of words w[i..j] as a sequence of words w_i, w_{i + 1}, ..., w_j. Two segments of words w[i_1 .. j_1] and w[i_2 .. j_2] are considered equal if j_1 - i_1 = j_2 - i_2, j_1 ≥ i_1, j_2 ≥ i_2, and for every t ∈ [0, j_1 - i_1] w_{i_1 + t} = w_{i_2 + t}. For example, for the text "to be or not to be" the segments w[1..2] and w[5..6] are equal, they correspond to the words "to be".
An abbreviation is a replacement of some segments of words with their first uppercase letters. In order to perform an abbreviation, you have to choose at least two non-intersecting equal segments of words, and replace each chosen segment with the string consisting of first letters of the words in the segment (written in uppercase). For example, for the text "a ab a a b ab a a b c" you can replace segments of words w[2..4] and w[6..8] with an abbreviation "AAA" and obtain the text "a AAA b AAA b c", or you can replace segments of words w[2..5] and w[6..9] with an abbreviation "AAAB" and obtain the text "a AAAB AAAB c".
What is the minimum length of the text after at most one abbreviation?
Input
The first line of the input contains one integer n (1 ≤ n ≤ 300) — the number of words in the text.
The next line contains n space-separated words of the text w_1, w_2, ..., w_n. Each word consists only of lowercase Latin letters.
It is guaranteed that the length of text does not exceed 10^5.
Output
Print one integer — the minimum length of the text after at most one abbreviation.
Examples
Input
6
to be or not to be
Output
12
Input
10
a ab a a b ab a a b c
Output
13
Input
6
aa bb aa aa bb bb
Output
11
Note
In the first example you can obtain the text "TB or not TB".
In the second example you can obtain the text "a AAAB AAAB c".
In the third example you can obtain the text "AB aa AB bb".
Submitted Solution:
```
#!/usr/bin/env python3
import math
import sys
import re
def get_abbreviation(s):
abbrev = ""
for w in s:
abbrev += w[0].upper()
return abbrev
results = {}
def calculate_savings(o):
ss_word_count = len(o[0].split(" ")) # This will be the size of abbrev (ex. a ab abbbb abbbb = 4 (AAAA))
ss_length = len(o[0]) # This will be the size saved for each word (ex. a ab abbb = 9
# To get the savings we take how much is saved per occurrence ss_len - ss_word_count
# and multiple by the total number of occurrences len(o)
return (ss_length - ss_word_count) * len(o)
def substring_length(start, end, testWords, testString):
mid = math.ceil((start + end)/2)
substring = " ".join(testWords[start:end])
if substring not in results:
r = '\\b{}\\b'.format(substring)
o = re.findall(r, testString)
if len(o) > 1:
savings = calculate_savings(o)
#print("testString: {} substring: {} o: {} savings: {}".format(testString, substring, o, savings))
results[substring] = savings
if start < mid and end > mid:
substring_length(start, mid, testWords, testString)
substring_length(mid, end, testWords, testString)
input_count = sys.stdin.readline()
input_word = sys.stdin.readline()
testString = input_word.rstrip()
testWords = testString.split(" ")
substring_length(0, len(testWords), testWords, testString)
#print(results)
sorted_by_value = sorted(results.items(), key=lambda kv: kv[1], reverse=True)
to_replace = sorted_by_value[0][0]
#print(sorted_by_value)
abbreviation = get_abbreviation(to_replace.split(" "))
#print("Converting {} to {}".format(to_replace, abbreviation))
r = '\\b{}\\b'.format(to_replace)
finalString = re.sub(r, abbreviation, testString)
#print("Converted original {} to final {} length: {}".format(testString, finalString, len(finalString)))
print(len(finalString))
```
No
| 97,830
|
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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 a text consisting of n space-separated words. There is exactly one space character between any pair of adjacent words. There are no spaces before the first word and no spaces after the last word. The length of text is the number of letters and spaces in it. w_i is the i-th word of text. All words consist only of lowercase Latin letters.
Let's denote a segment of words w[i..j] as a sequence of words w_i, w_{i + 1}, ..., w_j. Two segments of words w[i_1 .. j_1] and w[i_2 .. j_2] are considered equal if j_1 - i_1 = j_2 - i_2, j_1 ≥ i_1, j_2 ≥ i_2, and for every t ∈ [0, j_1 - i_1] w_{i_1 + t} = w_{i_2 + t}. For example, for the text "to be or not to be" the segments w[1..2] and w[5..6] are equal, they correspond to the words "to be".
An abbreviation is a replacement of some segments of words with their first uppercase letters. In order to perform an abbreviation, you have to choose at least two non-intersecting equal segments of words, and replace each chosen segment with the string consisting of first letters of the words in the segment (written in uppercase). For example, for the text "a ab a a b ab a a b c" you can replace segments of words w[2..4] and w[6..8] with an abbreviation "AAA" and obtain the text "a AAA b AAA b c", or you can replace segments of words w[2..5] and w[6..9] with an abbreviation "AAAB" and obtain the text "a AAAB AAAB c".
What is the minimum length of the text after at most one abbreviation?
Input
The first line of the input contains one integer n (1 ≤ n ≤ 300) — the number of words in the text.
The next line contains n space-separated words of the text w_1, w_2, ..., w_n. Each word consists only of lowercase Latin letters.
It is guaranteed that the length of text does not exceed 10^5.
Output
Print one integer — the minimum length of the text after at most one abbreviation.
Examples
Input
6
to be or not to be
Output
12
Input
10
a ab a a b ab a a b c
Output
13
Input
6
aa bb aa aa bb bb
Output
11
Note
In the first example you can obtain the text "TB or not TB".
In the second example you can obtain the text "a AAAB AAAB c".
In the third example you can obtain the text "AB aa AB bb".
Submitted Solution:
```
wNum = int(input())
text = str(input())
oldSize = len(text)
tData = text.split(' ')
diff = 0
for s in range(1, wNum // 2 + 1):
for i in range(wNum - s):
words = ' '.join(tData[i:i + s])
cnt = text.count(words)
if cnt != 1:
score = (len(words) - s) * text.count(words)
diff = score if score > diff else diff
print(oldSize - diff)
```
No
| 97,831
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's define a string <x> as an opening tag, where x is any small letter of the Latin alphabet. Each opening tag matches a closing tag of the type </x>, where x is the same letter.
Tegs can be nested into each other: in this case one opening and closing tag pair is located inside another pair.
Let's define the notion of a XML-text:
* an empty string is a XML-text
* if s is a XML-text, then s'=<a>+s+</a> also is a XML-text, where a is any small Latin letter
* if s1, s2 are XML-texts, then s1+s2 also is a XML-text
You are given a XML-text (it is guaranteed that the text is valid), your task is to print in the following form:
* each tag (opening and closing) is located on a single line
* print before the tag 2 * h spaces, where h is the level of the tag's nestedness.
Input
The input data consists on the only non-empty string — the XML-text, its length does not exceed 1000 characters. It is guaranteed that the text is valid. The text contains no spaces.
Output
Print the given XML-text according to the above-given rules.
Examples
Input
<a><b><c></c></b></a>
Output
<a>
<b>
<c>
</c>
</b>
</a>
Input
<a><b></b><d><c></c></d></a>
Output
<a>
<b>
</b>
<d>
<c>
</c>
</d>
</a>
Tags: implementation
Correct Solution:
```
spacecnt = 0;
for tag in (input().split('>'))[:-1]:
if tag.find('/') != -1:
spacecnt -= 2
print(' '*spacecnt+tag+'>')
else:
print(' '*spacecnt+tag+'>')
spacecnt += 2
```
| 97,970
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's define a string <x> as an opening tag, where x is any small letter of the Latin alphabet. Each opening tag matches a closing tag of the type </x>, where x is the same letter.
Tegs can be nested into each other: in this case one opening and closing tag pair is located inside another pair.
Let's define the notion of a XML-text:
* an empty string is a XML-text
* if s is a XML-text, then s'=<a>+s+</a> also is a XML-text, where a is any small Latin letter
* if s1, s2 are XML-texts, then s1+s2 also is a XML-text
You are given a XML-text (it is guaranteed that the text is valid), your task is to print in the following form:
* each tag (opening and closing) is located on a single line
* print before the tag 2 * h spaces, where h is the level of the tag's nestedness.
Input
The input data consists on the only non-empty string — the XML-text, its length does not exceed 1000 characters. It is guaranteed that the text is valid. The text contains no spaces.
Output
Print the given XML-text according to the above-given rules.
Examples
Input
<a><b><c></c></b></a>
Output
<a>
<b>
<c>
</c>
</b>
</a>
Input
<a><b></b><d><c></c></d></a>
Output
<a>
<b>
</b>
<d>
<c>
</c>
</d>
</a>
Tags: implementation
Correct Solution:
```
from string import ascii_lowercase
def print_end_tag(level, character):
print(" " * level + f"</{character}>" if level else f"</{character}>")
def print_start_tag(level, character):
print(" " * level + f"<{character}>" if level else f"<{character}>")
def main():
xml_line = input()
counter = 0
last_character = ''
for character in xml_line:
if character == '<' or character == '>':
continue
if character in ascii_lowercase:
end_tag = True if last_character == '/' else False
if not end_tag:
print_start_tag(counter, character)
counter += 1
else:
counter -= 1
print_end_tag(counter, character)
last_character = character
main()
```
| 97,971
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's define a string <x> as an opening tag, where x is any small letter of the Latin alphabet. Each opening tag matches a closing tag of the type </x>, where x is the same letter.
Tegs can be nested into each other: in this case one opening and closing tag pair is located inside another pair.
Let's define the notion of a XML-text:
* an empty string is a XML-text
* if s is a XML-text, then s'=<a>+s+</a> also is a XML-text, where a is any small Latin letter
* if s1, s2 are XML-texts, then s1+s2 also is a XML-text
You are given a XML-text (it is guaranteed that the text is valid), your task is to print in the following form:
* each tag (opening and closing) is located on a single line
* print before the tag 2 * h spaces, where h is the level of the tag's nestedness.
Input
The input data consists on the only non-empty string — the XML-text, its length does not exceed 1000 characters. It is guaranteed that the text is valid. The text contains no spaces.
Output
Print the given XML-text according to the above-given rules.
Examples
Input
<a><b><c></c></b></a>
Output
<a>
<b>
<c>
</c>
</b>
</a>
Input
<a><b></b><d><c></c></d></a>
Output
<a>
<b>
</b>
<d>
<c>
</c>
</d>
</a>
Tags: implementation
Correct Solution:
```
xml = input()
tags = xml.split('>')[:-1]
for i in range(len(tags)):
tags[i] += '>'
h = 0
for tag in tags:
if '</' not in tag:
print(' ' * 2 * h + tag)
h += 1
else:
h -= 1
print(' ' * 2 * h + tag)
```
| 97,972
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's define a string <x> as an opening tag, where x is any small letter of the Latin alphabet. Each opening tag matches a closing tag of the type </x>, where x is the same letter.
Tegs can be nested into each other: in this case one opening and closing tag pair is located inside another pair.
Let's define the notion of a XML-text:
* an empty string is a XML-text
* if s is a XML-text, then s'=<a>+s+</a> also is a XML-text, where a is any small Latin letter
* if s1, s2 are XML-texts, then s1+s2 also is a XML-text
You are given a XML-text (it is guaranteed that the text is valid), your task is to print in the following form:
* each tag (opening and closing) is located on a single line
* print before the tag 2 * h spaces, where h is the level of the tag's nestedness.
Input
The input data consists on the only non-empty string — the XML-text, its length does not exceed 1000 characters. It is guaranteed that the text is valid. The text contains no spaces.
Output
Print the given XML-text according to the above-given rules.
Examples
Input
<a><b><c></c></b></a>
Output
<a>
<b>
<c>
</c>
</b>
</a>
Input
<a><b></b><d><c></c></d></a>
Output
<a>
<b>
</b>
<d>
<c>
</c>
</d>
</a>
Tags: implementation
Correct Solution:
```
str_input = input()
queue = []
indentation = 0
while(str_input != ""):
if(str_input[1] == '/'):
print("%s%s"%(indentation * " ", str_input[0:4]))
queue.pop()
str_input = str_input[4:]
if(str_input != "" and str_input[1] == "/"):
indentation -= 2
else:
print("%s%s"%(indentation * " ", str_input[0:3]))
queue.append(str_input[1:2])
str_input = str_input[3:]
if(str_input != "" and str_input[0:3] != "</%s"%(queue[-1])):
indentation += 2
```
| 97,973
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's define a string <x> as an opening tag, where x is any small letter of the Latin alphabet. Each opening tag matches a closing tag of the type </x>, where x is the same letter.
Tegs can be nested into each other: in this case one opening and closing tag pair is located inside another pair.
Let's define the notion of a XML-text:
* an empty string is a XML-text
* if s is a XML-text, then s'=<a>+s+</a> also is a XML-text, where a is any small Latin letter
* if s1, s2 are XML-texts, then s1+s2 also is a XML-text
You are given a XML-text (it is guaranteed that the text is valid), your task is to print in the following form:
* each tag (opening and closing) is located on a single line
* print before the tag 2 * h spaces, where h is the level of the tag's nestedness.
Input
The input data consists on the only non-empty string — the XML-text, its length does not exceed 1000 characters. It is guaranteed that the text is valid. The text contains no spaces.
Output
Print the given XML-text according to the above-given rules.
Examples
Input
<a><b><c></c></b></a>
Output
<a>
<b>
<c>
</c>
</b>
</a>
Input
<a><b></b><d><c></c></d></a>
Output
<a>
<b>
</b>
<d>
<c>
</c>
</d>
</a>
Tags: implementation
Correct Solution:
```
s = input().split(">")
del s[-1]
s = [i+">" for i in s]
h = 0
for i in s:
if "/" in i:
h-=1
print(h*2*" "+i)
else:
print(h*2*" "+i)
h+=1
```
| 97,974
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's define a string <x> as an opening tag, where x is any small letter of the Latin alphabet. Each opening tag matches a closing tag of the type </x>, where x is the same letter.
Tegs can be nested into each other: in this case one opening and closing tag pair is located inside another pair.
Let's define the notion of a XML-text:
* an empty string is a XML-text
* if s is a XML-text, then s'=<a>+s+</a> also is a XML-text, where a is any small Latin letter
* if s1, s2 are XML-texts, then s1+s2 also is a XML-text
You are given a XML-text (it is guaranteed that the text is valid), your task is to print in the following form:
* each tag (opening and closing) is located on a single line
* print before the tag 2 * h spaces, where h is the level of the tag's nestedness.
Input
The input data consists on the only non-empty string — the XML-text, its length does not exceed 1000 characters. It is guaranteed that the text is valid. The text contains no spaces.
Output
Print the given XML-text according to the above-given rules.
Examples
Input
<a><b><c></c></b></a>
Output
<a>
<b>
<c>
</c>
</b>
</a>
Input
<a><b></b><d><c></c></d></a>
Output
<a>
<b>
</b>
<d>
<c>
</c>
</d>
</a>
Tags: implementation
Correct Solution:
```
h = 0
for tag in input().replace('><', '> <').split():
if '/' in tag:
h -= 2
print(h*' ' + tag)
if '/' not in tag:
h += 2
```
| 97,975
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's define a string <x> as an opening tag, where x is any small letter of the Latin alphabet. Each opening tag matches a closing tag of the type </x>, where x is the same letter.
Tegs can be nested into each other: in this case one opening and closing tag pair is located inside another pair.
Let's define the notion of a XML-text:
* an empty string is a XML-text
* if s is a XML-text, then s'=<a>+s+</a> also is a XML-text, where a is any small Latin letter
* if s1, s2 are XML-texts, then s1+s2 also is a XML-text
You are given a XML-text (it is guaranteed that the text is valid), your task is to print in the following form:
* each tag (opening and closing) is located on a single line
* print before the tag 2 * h spaces, where h is the level of the tag's nestedness.
Input
The input data consists on the only non-empty string — the XML-text, its length does not exceed 1000 characters. It is guaranteed that the text is valid. The text contains no spaces.
Output
Print the given XML-text according to the above-given rules.
Examples
Input
<a><b><c></c></b></a>
Output
<a>
<b>
<c>
</c>
</b>
</a>
Input
<a><b></b><d><c></c></d></a>
Output
<a>
<b>
</b>
<d>
<c>
</c>
</d>
</a>
Tags: implementation
Correct Solution:
```
a = input().split('>')
#print(*a)
bal = 0
for s in a:
if len(s) == 0:
continue
if (s[1] == '/' ):
bal -= 1
print(bal * " " + s+ ">")
else:
print(bal * " " + s + ">")
bal +=1
```
| 97,976
|
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|
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's define a string <x> as an opening tag, where x is any small letter of the Latin alphabet. Each opening tag matches a closing tag of the type </x>, where x is the same letter.
Tegs can be nested into each other: in this case one opening and closing tag pair is located inside another pair.
Let's define the notion of a XML-text:
* an empty string is a XML-text
* if s is a XML-text, then s'=<a>+s+</a> also is a XML-text, where a is any small Latin letter
* if s1, s2 are XML-texts, then s1+s2 also is a XML-text
You are given a XML-text (it is guaranteed that the text is valid), your task is to print in the following form:
* each tag (opening and closing) is located on a single line
* print before the tag 2 * h spaces, where h is the level of the tag's nestedness.
Input
The input data consists on the only non-empty string — the XML-text, its length does not exceed 1000 characters. It is guaranteed that the text is valid. The text contains no spaces.
Output
Print the given XML-text according to the above-given rules.
Examples
Input
<a><b><c></c></b></a>
Output
<a>
<b>
<c>
</c>
</b>
</a>
Input
<a><b></b><d><c></c></d></a>
Output
<a>
<b>
</b>
<d>
<c>
</c>
</d>
</a>
Tags: implementation
Correct Solution:
```
s=input()
s1=s.split('<')
del s1[0]
c=0
for i in s1:
if '/' in i:
print(' '*(c-1),'<',i,sep='')
c-=1
else:
print(' '*c,'<',i,sep='')
c+=1
```
| 97,977
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] | 6
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's define a string <x> as an opening tag, where x is any small letter of the Latin alphabet. Each opening tag matches a closing tag of the type </x>, where x is the same letter.
Tegs can be nested into each other: in this case one opening and closing tag pair is located inside another pair.
Let's define the notion of a XML-text:
* an empty string is a XML-text
* if s is a XML-text, then s'=<a>+s+</a> also is a XML-text, where a is any small Latin letter
* if s1, s2 are XML-texts, then s1+s2 also is a XML-text
You are given a XML-text (it is guaranteed that the text is valid), your task is to print in the following form:
* each tag (opening and closing) is located on a single line
* print before the tag 2 * h spaces, where h is the level of the tag's nestedness.
Input
The input data consists on the only non-empty string — the XML-text, its length does not exceed 1000 characters. It is guaranteed that the text is valid. The text contains no spaces.
Output
Print the given XML-text according to the above-given rules.
Examples
Input
<a><b><c></c></b></a>
Output
<a>
<b>
<c>
</c>
</b>
</a>
Input
<a><b></b><d><c></c></d></a>
Output
<a>
<b>
</b>
<d>
<c>
</c>
</d>
</a>
Submitted Solution:
```
import math
for m in range(1,2):
#t = int(input())
s = str(input())
curr=[]
i=0
#print(len(s))
j=0
for j in range(len(s)*2):
#print(i)
if i>=len(s):
break
if "/" in s[i:i+3+1]:
#print(s[i:i+4])
if s[i+2] in curr:
# print(curr)
curr.reverse()
index1= curr.index(s[i+2])
# print(index1)
index1= len(curr) - index1-1
# print(curr)
print(index1* " "+ s[i:i+3+1])
curr.remove(s[i+2])
curr.reverse()
i+=4
else:
#print(1)
#if i>=37:
# index1 = curr.index(s[i+1])
#print(s[i+1] not in curr, curr)
if s[i+1] in curr:
curr.append(s[i+1])
curr.reverse()
index1 = curr.index(s[i+1])
index1=len(curr) - index1-1
print(index1* " "+ s[i:i+3])
curr.reverse()
i+=3
continue
curr.append(s[i+1])
index1 = curr.index(s[i+1])
print(index1*" "+s[i:i+3])
i+=3
```
Yes
| 97,978
|
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] | 6
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's define a string <x> as an opening tag, where x is any small letter of the Latin alphabet. Each opening tag matches a closing tag of the type </x>, where x is the same letter.
Tegs can be nested into each other: in this case one opening and closing tag pair is located inside another pair.
Let's define the notion of a XML-text:
* an empty string is a XML-text
* if s is a XML-text, then s'=<a>+s+</a> also is a XML-text, where a is any small Latin letter
* if s1, s2 are XML-texts, then s1+s2 also is a XML-text
You are given a XML-text (it is guaranteed that the text is valid), your task is to print in the following form:
* each tag (opening and closing) is located on a single line
* print before the tag 2 * h spaces, where h is the level of the tag's nestedness.
Input
The input data consists on the only non-empty string — the XML-text, its length does not exceed 1000 characters. It is guaranteed that the text is valid. The text contains no spaces.
Output
Print the given XML-text according to the above-given rules.
Examples
Input
<a><b><c></c></b></a>
Output
<a>
<b>
<c>
</c>
</b>
</a>
Input
<a><b></b><d><c></c></d></a>
Output
<a>
<b>
</b>
<d>
<c>
</c>
</d>
</a>
Submitted Solution:
```
text = input().strip()
visited = []
spacing_level = 0
for i in range(len(text)):
letter = text[i]
if letter in "</>":
continue
if text[i-1] == '/':
spacing_level -= 1
print(" " * spacing_level + "</" + letter + ">")
else:
print(" " * spacing_level + "<" + letter + ">")
spacing_level += 1
```
Yes
| 97,979
|
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] | 6
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's define a string <x> as an opening tag, where x is any small letter of the Latin alphabet. Each opening tag matches a closing tag of the type </x>, where x is the same letter.
Tegs can be nested into each other: in this case one opening and closing tag pair is located inside another pair.
Let's define the notion of a XML-text:
* an empty string is a XML-text
* if s is a XML-text, then s'=<a>+s+</a> also is a XML-text, where a is any small Latin letter
* if s1, s2 are XML-texts, then s1+s2 also is a XML-text
You are given a XML-text (it is guaranteed that the text is valid), your task is to print in the following form:
* each tag (opening and closing) is located on a single line
* print before the tag 2 * h spaces, where h is the level of the tag's nestedness.
Input
The input data consists on the only non-empty string — the XML-text, its length does not exceed 1000 characters. It is guaranteed that the text is valid. The text contains no spaces.
Output
Print the given XML-text according to the above-given rules.
Examples
Input
<a><b><c></c></b></a>
Output
<a>
<b>
<c>
</c>
</b>
</a>
Input
<a><b></b><d><c></c></d></a>
Output
<a>
<b>
</b>
<d>
<c>
</c>
</d>
</a>
Submitted Solution:
```
s,k=input().split('<')[1:],0
for c in s:
if c[0]=='/':
print(' '*(k-1),'<',c,sep='')
k-=1
else:
print(' '*k,'<',c,sep='')
k+=1
```
Yes
| 97,980
|
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] | 6
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's define a string <x> as an opening tag, where x is any small letter of the Latin alphabet. Each opening tag matches a closing tag of the type </x>, where x is the same letter.
Tegs can be nested into each other: in this case one opening and closing tag pair is located inside another pair.
Let's define the notion of a XML-text:
* an empty string is a XML-text
* if s is a XML-text, then s'=<a>+s+</a> also is a XML-text, where a is any small Latin letter
* if s1, s2 are XML-texts, then s1+s2 also is a XML-text
You are given a XML-text (it is guaranteed that the text is valid), your task is to print in the following form:
* each tag (opening and closing) is located on a single line
* print before the tag 2 * h spaces, where h is the level of the tag's nestedness.
Input
The input data consists on the only non-empty string — the XML-text, its length does not exceed 1000 characters. It is guaranteed that the text is valid. The text contains no spaces.
Output
Print the given XML-text according to the above-given rules.
Examples
Input
<a><b><c></c></b></a>
Output
<a>
<b>
<c>
</c>
</b>
</a>
Input
<a><b></b><d><c></c></d></a>
Output
<a>
<b>
</b>
<d>
<c>
</c>
</d>
</a>
Submitted Solution:
```
s = input().split('<')[1:]
level = -1
arr = set()
f = False
for i in s:
f = False
if i[0]!='/':
f = True
if f: level+=1
print(" "*(2*level) + '<' + i)
if not f: level-=1
# print(2*level)
```
Yes
| 97,981
|
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|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's define a string <x> as an opening tag, where x is any small letter of the Latin alphabet. Each opening tag matches a closing tag of the type </x>, where x is the same letter.
Tegs can be nested into each other: in this case one opening and closing tag pair is located inside another pair.
Let's define the notion of a XML-text:
* an empty string is a XML-text
* if s is a XML-text, then s'=<a>+s+</a> also is a XML-text, where a is any small Latin letter
* if s1, s2 are XML-texts, then s1+s2 also is a XML-text
You are given a XML-text (it is guaranteed that the text is valid), your task is to print in the following form:
* each tag (opening and closing) is located on a single line
* print before the tag 2 * h spaces, where h is the level of the tag's nestedness.
Input
The input data consists on the only non-empty string — the XML-text, its length does not exceed 1000 characters. It is guaranteed that the text is valid. The text contains no spaces.
Output
Print the given XML-text according to the above-given rules.
Examples
Input
<a><b><c></c></b></a>
Output
<a>
<b>
<c>
</c>
</b>
</a>
Input
<a><b></b><d><c></c></d></a>
Output
<a>
<b>
</b>
<d>
<c>
</c>
</d>
</a>
Submitted Solution:
```
a = input().split('>')
print(*a)
bal = 0
for s in a:
if len(s) == 0:
continue
if (s[1] == '/' ):
bal -= 1
print(bal * " " + s+ ">")
else:
print(bal * " " + s + ">")
bal +=1
```
No
| 97,982
|
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] | 6
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's define a string <x> as an opening tag, where x is any small letter of the Latin alphabet. Each opening tag matches a closing tag of the type </x>, where x is the same letter.
Tegs can be nested into each other: in this case one opening and closing tag pair is located inside another pair.
Let's define the notion of a XML-text:
* an empty string is a XML-text
* if s is a XML-text, then s'=<a>+s+</a> also is a XML-text, where a is any small Latin letter
* if s1, s2 are XML-texts, then s1+s2 also is a XML-text
You are given a XML-text (it is guaranteed that the text is valid), your task is to print in the following form:
* each tag (opening and closing) is located on a single line
* print before the tag 2 * h spaces, where h is the level of the tag's nestedness.
Input
The input data consists on the only non-empty string — the XML-text, its length does not exceed 1000 characters. It is guaranteed that the text is valid. The text contains no spaces.
Output
Print the given XML-text according to the above-given rules.
Examples
Input
<a><b><c></c></b></a>
Output
<a>
<b>
<c>
</c>
</b>
</a>
Input
<a><b></b><d><c></c></d></a>
Output
<a>
<b>
</b>
<d>
<c>
</c>
</d>
</a>
Submitted Solution:
```
from string import ascii_lowercase
def print_end_tag(level, character):
print(" " * level, f"</{character}>")
def print_start_tag(level, character):
print(" " * level, f"<{character}>")
def main():
xml_line = input()
counter = 0
last_character = ''
for character in xml_line:
if character == '<' or character == '>':
continue
if character in ascii_lowercase:
end_tag = True if last_character == '/' else False
if not end_tag:
print_start_tag(counter, character)
counter += 1
else:
counter -= 1
print_end_tag(counter, character)
last_character = character
main()
```
No
| 97,983
|
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] | 6
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's define a string <x> as an opening tag, where x is any small letter of the Latin alphabet. Each opening tag matches a closing tag of the type </x>, where x is the same letter.
Tegs can be nested into each other: in this case one opening and closing tag pair is located inside another pair.
Let's define the notion of a XML-text:
* an empty string is a XML-text
* if s is a XML-text, then s'=<a>+s+</a> also is a XML-text, where a is any small Latin letter
* if s1, s2 are XML-texts, then s1+s2 also is a XML-text
You are given a XML-text (it is guaranteed that the text is valid), your task is to print in the following form:
* each tag (opening and closing) is located on a single line
* print before the tag 2 * h spaces, where h is the level of the tag's nestedness.
Input
The input data consists on the only non-empty string — the XML-text, its length does not exceed 1000 characters. It is guaranteed that the text is valid. The text contains no spaces.
Output
Print the given XML-text according to the above-given rules.
Examples
Input
<a><b><c></c></b></a>
Output
<a>
<b>
<c>
</c>
</b>
</a>
Input
<a><b></b><d><c></c></d></a>
Output
<a>
<b>
</b>
<d>
<c>
</c>
</d>
</a>
Submitted Solution:
```
s = input().split('<')[1:]
level = 1
arr = set()
for i in s:
print(" "*level + '<' + i)
if i[0]!='/':
level += 1
else:
level -= 1
```
No
| 97,984
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] | 6
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's define a string <x> as an opening tag, where x is any small letter of the Latin alphabet. Each opening tag matches a closing tag of the type </x>, where x is the same letter.
Tegs can be nested into each other: in this case one opening and closing tag pair is located inside another pair.
Let's define the notion of a XML-text:
* an empty string is a XML-text
* if s is a XML-text, then s'=<a>+s+</a> also is a XML-text, where a is any small Latin letter
* if s1, s2 are XML-texts, then s1+s2 also is a XML-text
You are given a XML-text (it is guaranteed that the text is valid), your task is to print in the following form:
* each tag (opening and closing) is located on a single line
* print before the tag 2 * h spaces, where h is the level of the tag's nestedness.
Input
The input data consists on the only non-empty string — the XML-text, its length does not exceed 1000 characters. It is guaranteed that the text is valid. The text contains no spaces.
Output
Print the given XML-text according to the above-given rules.
Examples
Input
<a><b><c></c></b></a>
Output
<a>
<b>
<c>
</c>
</b>
</a>
Input
<a><b></b><d><c></c></d></a>
Output
<a>
<b>
</b>
<d>
<c>
</c>
</d>
</a>
Submitted Solution:
```
n=input()
ls=[]
i=0
while (i<len(n)):
if(n[i]=='<'):
p=''
j=i
while(n[j]!='>'):
p+=n[j]
j+=1
p+='>'
ls.append(p)
i+=1
k=0
i=0
while i<len(ls):
flag=0
if (ls[i].replace(' ','')[1]=='/'):
i+=1
continue
else:
j=i+1
while (j<len(ls) and ls[j].replace(' ','').replace('/','')!=ls[i].replace(' ','')):
ls[j]=' '*2+ls[j]
j+=1
i+=1
for i in ls:
print(i)
```
No
| 97,985
|
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
A necklace can be described as a string of links ('-') and pearls ('o'), with the last link or pearl connected to the first one.
<image>
You can remove a link or a pearl and insert it between two other existing links or pearls (or between a link and a pearl) on the necklace. This process can be repeated as many times as you like, but you can't throw away any parts.
Can you make the number of links between every two adjacent pearls equal? Two pearls are considered to be adjacent if there is no other pearl between them.
Note that the final necklace should remain as one circular part of the same length as the initial necklace.
Input
The only line of input contains a string s (3 ≤ |s| ≤ 100), representing the necklace, where a dash '-' represents a link and the lowercase English letter 'o' represents a pearl.
Output
Print "YES" if the links and pearls can be rejoined such that the number of links between adjacent pearls is equal. Otherwise print "NO".
You can print each letter in any case (upper or lower).
Examples
Input
<span class="tex-font-style-tt">-o-o--</span>
Output
YES
Input
<span class="tex-font-style-tt">-o---</span>
Output
YES
Input
<span class="tex-font-style-tt">-o---o-</span>
Output
NO
Input
ooo
Output
YES
Tags: implementation, math
Correct Solution:
```
# coding=utf-8
s = str(input())
links = 0
for i in range(len(s)):
if s[i] == '-':
links += 1
pearls = len(s) - links
if pearls == 0:
print('YES')
elif links%pearls == 0:
print('YES')
else:
print('NO')
```
| 99,223
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
A necklace can be described as a string of links ('-') and pearls ('o'), with the last link or pearl connected to the first one.
<image>
You can remove a link or a pearl and insert it between two other existing links or pearls (or between a link and a pearl) on the necklace. This process can be repeated as many times as you like, but you can't throw away any parts.
Can you make the number of links between every two adjacent pearls equal? Two pearls are considered to be adjacent if there is no other pearl between them.
Note that the final necklace should remain as one circular part of the same length as the initial necklace.
Input
The only line of input contains a string s (3 ≤ |s| ≤ 100), representing the necklace, where a dash '-' represents a link and the lowercase English letter 'o' represents a pearl.
Output
Print "YES" if the links and pearls can be rejoined such that the number of links between adjacent pearls is equal. Otherwise print "NO".
You can print each letter in any case (upper or lower).
Examples
Input
<span class="tex-font-style-tt">-o-o--</span>
Output
YES
Input
<span class="tex-font-style-tt">-o---</span>
Output
YES
Input
<span class="tex-font-style-tt">-o---o-</span>
Output
NO
Input
ooo
Output
YES
Tags: implementation, math
Correct Solution:
```
s = input()
ls = len(s)
ac = 0
bc = 0
for i in range(ls):
if s[i] == 'o':
ac += 1
elif s[i] == '-':
bc += 1
if ac == 0:
print('YES')
elif bc % ac == 0:
print('YES')
else:
print('NO')
```
| 99,224
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
A necklace can be described as a string of links ('-') and pearls ('o'), with the last link or pearl connected to the first one.
<image>
You can remove a link or a pearl and insert it between two other existing links or pearls (or between a link and a pearl) on the necklace. This process can be repeated as many times as you like, but you can't throw away any parts.
Can you make the number of links between every two adjacent pearls equal? Two pearls are considered to be adjacent if there is no other pearl between them.
Note that the final necklace should remain as one circular part of the same length as the initial necklace.
Input
The only line of input contains a string s (3 ≤ |s| ≤ 100), representing the necklace, where a dash '-' represents a link and the lowercase English letter 'o' represents a pearl.
Output
Print "YES" if the links and pearls can be rejoined such that the number of links between adjacent pearls is equal. Otherwise print "NO".
You can print each letter in any case (upper or lower).
Examples
Input
<span class="tex-font-style-tt">-o-o--</span>
Output
YES
Input
<span class="tex-font-style-tt">-o---</span>
Output
YES
Input
<span class="tex-font-style-tt">-o---o-</span>
Output
NO
Input
ooo
Output
YES
Tags: implementation, math
Correct Solution:
```
a = input()
t = a.count("o")
r = len(a) - t
if t == 0:
print("YES")
elif r%(t) == 0:
print("YES")
else:
print("NO")
```
| 99,225
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] | 6
|
Provide tags and a correct Python 3 solution for this coding contest problem.
A necklace can be described as a string of links ('-') and pearls ('o'), with the last link or pearl connected to the first one.
<image>
You can remove a link or a pearl and insert it between two other existing links or pearls (or between a link and a pearl) on the necklace. This process can be repeated as many times as you like, but you can't throw away any parts.
Can you make the number of links between every two adjacent pearls equal? Two pearls are considered to be adjacent if there is no other pearl between them.
Note that the final necklace should remain as one circular part of the same length as the initial necklace.
Input
The only line of input contains a string s (3 ≤ |s| ≤ 100), representing the necklace, where a dash '-' represents a link and the lowercase English letter 'o' represents a pearl.
Output
Print "YES" if the links and pearls can be rejoined such that the number of links between adjacent pearls is equal. Otherwise print "NO".
You can print each letter in any case (upper or lower).
Examples
Input
<span class="tex-font-style-tt">-o-o--</span>
Output
YES
Input
<span class="tex-font-style-tt">-o---</span>
Output
YES
Input
<span class="tex-font-style-tt">-o---o-</span>
Output
NO
Input
ooo
Output
YES
Tags: implementation, math
Correct Solution:
```
x=input()
# print(x.count('-')%x.count('o'))
if 'o' not in x:
print('YES')
elif '-' not in x:
print('YES')
elif x.count('o')==1:
print('YES')
elif x.count('-')%x.count('o')==0:
print('YES')
else:
print('NO')
```
| 99,226
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|
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