3-line of easy-to-understand XOR method in C++

  • 0

    XOR every character, the added one will not be canceled to 0.

        char findTheDifference(string s, string t) {
            int sum = 0;
            for (int i = 0; i < s.length(); ++i) sum ^= t[i] ^ s[i];
            return sum ^ t.back();

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