func_code_string: #include <bits/stdc++.h>   using namespace std;   const int INF = 0x3f3f3f3f;   const double eps = 1e-8;   const int mod = 1e9 + 7;   const int P = 1e9 + 7;   const int N = 2e7;   const int maxn = 1e6 + 5;   long long t, a, b, x, y, n, minn;   int main() {     ios::sync_with_stdio(false);     cin >> t;     while (t--) {       cin >> a >> b >> x >> y >> n;       long long temp1 = max(x, a - n);       long long temp2 = max(y, b - n);       if (temp1 >= temp2) {         swap(a, b);         swap(x, y);       }       minn = min(n, a - x);       n -= minn;       a -= minn;       minn = min(n, b - y);       b -= minn;       cout << a * b << endl;     }   }   