Codeforces Round #623 (Div. 2) A. Dead Pixel（模拟）

题目链接：https://codeforces.com/contest/1315/problem/A

#include <bits/stdc++.h>
using namespace std;

void solve() {
    int a, b, x, y; cin >> a >> b >> x >> y;
    cout << max(a * max(b - y - 1, y), b * max(a - x - 1, x)) << "\n";
}

int main() {
    int t; cin >> t;
    while (t--) solve();
}