func_code_string: #include <bits/stdc++.h>   using namespace std;   void solve() {     int a, b, ans;     cin >> a >> b;     int x = (a / 4) * 4;     int i = x, val = 0;     while (i < a) {       val = val ^ i;       i++;     }     if (val == b) {       ans = a;     } else if ((val ^ a) == b) {       ans = a + 2;     } else {       ans = a + 1;     }     cout << ans << endl;     return;   }   int main() {     int t;     cin >> t;     while (t > 0) {       solve();       t--;     }     return 0;   }   