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append-and-delete.py
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append-and-delete.py
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#https://www.hackerrank.com/challenges/append-and-delete/problem?isFullScreen=true
#!/bin/python3
import math
import os
import random
import re
import sys
#
# Complete the 'appendAndDelete' function below.
#
# The function is expected to return a STRING.
# The function accepts following parameters:
# 1. STRING s
# 2. STRING t
# 3. INTEGER k
#
def appendAndDelete(s, t, k):
# Write your code here
lenS = len(s)
lenT = len(t)
if k - lenS - lenT >= 0: # Performing this operation on an empty string results in an empty string
return 'Yes'
# find the substring starting at index i in s that does not match with t anymore
i = 0
while i < lenS and i < lenT and s[i] == t[i]:
i += 1
if i == 0:
k = k - lenS - lenT
else:
k = k - len(s[i:]) - len(t[i:])
if k >= 0 and k % 2 == 0: # k ops must be performed
return 'Yes'
return 'No'
if __name__ == '__main__':
fptr = open(os.environ['OUTPUT_PATH'], 'w')
s = input()
t = input()
k = int(input().strip())
result = appendAndDelete(s, t, k)
fptr.write(result + '\n')
fptr.close()