AcWing 3758. 距离零点的时刻

#include <iostream>
using namespace std;
int T, h, m;
int main() {
    cin >> T;
    while (T--) {
        cin >> h >> m;
        int ans = (24 - h) * 60 - m;
        cout << ans << endl;
    }
    return 0;
}