func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int a, b, n, i, t, r = 0;     while (cin >> t) {       for (i = 0; i < t; i++) {         cin >> a >> b >> n;         if (n % 3 == 1)           cout << b << endl;         else if (n % 3 == 0)           cout << a << endl;         else {           r = a ^ b;           cout << r << endl;           r = 0;         }       }     }     return 0;   }   