[220207] Find the Difference

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.

class Solution:def findTheDifference(self, s, t):c = 0for char in t:# 使用 ASCII 码记录c ^= ord(char)# ^ 计算，抵消相同数字 (x ^ x == 0)for char in s:c ^= ord(char)return chr(c)

from collections import Counterclass Solution:def findTheDifference(self, s, t):c_s = Counter(s)c_t = Counter(t)for item in c_t:# 分别比较每个字母出现的次数if not c_t[item] == c_s[item]:return item

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[220207] Find the Difference

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