Description
You are given two strings s
and t
.
String t
is generated by random shuffling string s
and then add one more letter at a random position.
Return the letter that was added to t
.
Example 1:
Input: s = "abcd", t = "abcde" Output: "e" Explanation: 'e' is the letter that was added.
Example 2:
Input: s = "", t = "y" Output: "y"
Constraints:
0 <= s.length <= 1000
t.length == s.length + 1
s
andt
consist of lowercase English letters.
Solution
Python3
class Solution:
def findTheDifference(self, s: str, t: str) -> str:
res = 0
for x in t:
res ^= ord(x)
for x in s:
res ^= ord(x)
return chr(res)