C++代码
#include<bits/stdc++.h>
using namespace std;
using ll = long long;
int main()
{
int tt;
cin >> tt;
while(tt --)
{
int n, m, r, c;
cin >> n >> m >> r >> c;
ll ans = max(r - 1, n - r) + max(c - 1, m - c);
cout << ans << '\n';
}
return 0;
}