s4553711
11/14/2017 - 2:26 PM

389.cpp

class Solution {
public:
    char findTheDifference(string s, string t) {
        char diff = 0;
        for(char c : s) {
            diff ^= c;
        }
        for(char c : t) {
            diff ^= c;
        }
        return diff;
    }
};