[leetcode] 389. Find the Difference 解题报告

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

    public char findTheDifference(String s, String t) {
        String st = s + t;
        char[] chs = st.toCharArray();
        char result = chs[0];
        for (int i = 1; i < chs.length; i++) {
            result^=chs[i];
        }
        return result;
    }

 

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

合并后 异或

一 刷：