func_code_string: #include <bits/stdc++.h>   using namespace std;   unsigned long long X, Y, sum, exor, l, m;   int main() {     cin >> sum >> exor;     if (sum < exor || sum % 2 != exor % 2) {       cout <<  -1  << endl;       return 0;     }     X = (sum - exor) / 2;     Y = sum - X;     cout << X << endl << Y << endl;   }   