1315A - Dead Pixel - CodeForces Solution

# include <bits/stdc++.h>
using namespace std;
int main(){
    int n;
    cin>>n;
    for(int i=0;i<n;i++){
        int n1,n2,n3,n4;
        cin>>n1>>n2>>n3>>n4;
       
            cout<<max(max(n3,n1-1-n3)*n2,n1*max(n4,n2-1-n4))<<endl;
        

    }
}