func_code_string: #include <bits/stdc++.h>   using namespace std;   const int N = 2e5 + 77;   int main() {     int a, b;     cin >> a >> b;     int ans = 0;     while (1) {       if (a <= 0 || b <= 0) break;       if (a < b) {         a++;         b -= 2;       } else {         b++;         a -= 2;       }       if (a < 0 || b < 0) break;       ++ans;     }     cout << ans << endl;     return 0;   }   