LeetCode[389]Find the Difference

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

class Solution {public:    char findTheDifference(string s, string t) {    sort(s.begin(), s.end());    sort(t.begin(), t.end());    int i;    for (i = 0; i < s.size(); i++)    if (s[i] != t[i])    break;    return t[i];    }};