2023.09.25 Today's Challenge

https://leetcode.com/problems/find-the-difference/

LeetCode - The World's Leading Online Programming Learning Platform

해쉬 테이블로 푸는 문제.

class Solution:
    def findTheDifference(self, s: str, t: str) -> str:
        ar = [0] * 26
        for tt in t:
            ar[ord(tt) - ord('a')] += 1
        for ss in s:
            ar[ord(ss) - ord('a')] -= 1
        for i in range(26):
            if ar[i] > 0:
                return chr(i + ord('a'))             
        return ""