func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int test_case;     cin >> test_case;     while (test_case--) {       int a, b, x, y;       vector<int> akash;       cin >> a >> b >> x >> y;       int temp1 = 0, temp2 = 0, temp3 = 0, temp4 = 0;       temp1 = ((b - y) - 1) * a;       temp2 = ((a - x) - 1) * b;       temp3 = (y - 0) * a;       temp4 = (x - 0) * b;       akash.push_back(temp1);       akash.push_back(temp2);       akash.push_back(temp3);       akash.push_back(temp4);       int max = akash[0];       for (int i = 1; i < 4; i++) {         if (max < akash[i]) {           max = akash[i];         }       }       cout << max << endl;       akash.clear();     }     return 0;   }   