Leetcode 389. Find the Difference 找不同 解题报告

1 解题思想

有两个字符串S和T，T是S打乱后多加一个字符，要找出这个不同的字符来。

嗯，这个问题其实就是异或，除了T多的那个字符外，都可以在异或中消除，不多说，很简单

2 原题

Given two strings s and t which consist of only lowercase letters.

String t is generated by random shuffling string s and then add one more letter at a random position.

Find the letter that was added in t.

Example:

Input:
s = "abcd"
t = "abcde"

Output:
e

Explanation:
'e' is the letter that was added.

3 AC解

public class Solution {
    public char findTheDifference(String s, String t) {
        char tmp = 0x00;
        for(int i=0;ichar)( tmp ^ s.charAt(i));
        for(int i=0;ichar)(tmp ^ t.charAt(i));
        return tmp;
    }
}