【LeetCode】【字符串】题号：*389. 找不同

every blog every motto: You will never know unless you try

0. 前言

生活好难，再坚持坚持！

1. 字符串

1.1 题目

1.2

class Solution:
    def findTheDifference(self, s: str, t: str) -> str:

        s_freq = collections.Counter(s)
        t_freq = collections.Counter(t)

        for ele in t:

            if s_freq[ele] != t_freq[ele]:
                return ele

1.3