func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long int a, b, x, y, n, ans, t;     cin >> t;     while (t--) {       ans = LLONG_MAX;       cin >> a >> b >> x >> y >> n;       if (n >= (a - x + b - y))         cout << x * y <<   n ;       else {         if ((a - n) >= x)           ans = (a - n) * b;         else {           if (b - (x - a + n) >= y) ans = min(ans, x * (b - (x - a + n)));         }         if ((b - n) >= y)           ans = min(ans, (b - n) * a);         else {           if (a - (y - b + n) >= x) ans = min(ans, y * (a - (y - b + n)));         }         cout << ans <<   n ;       }     }   }   