func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);     long long t, a, b, x, y, n, z, z2;     cin >> t;     while (t--) {       cin >> a >> b >> x >> y >> n;       if (abs(a - x) + abs(b - y) < n) {         n = abs(a - x) + abs(b - y);       }       long long a2 = a, b2 = b, x2 = x, y2 = y, n2 = n;       if (n2 > abs(a2 - x2)) {         n2 -= abs(a2 - x2);         a2 = x2;         b2 -= n2;       } else {         a2 -= n2;       }       if (n > abs(b - y)) {         n -= abs(b - y);         b = y;         a -= n;       } else {         b -= n;       }       cout << min(a2 * b2, a * b) <<   n ;     }     return 0;   }   