#include <iostream>
using namespace std;
int T;
int h,m;
int main()
{
    cin >> T;
    int H[T],M[T];
    for(int i = 0;i < T;i++){
        cin >> h >> m;
        H[i] = h;
        M[i] = m;
    }
    for(int j = 0;j < T;j++){
        int a = (23 - H[j]) * 60 + (60 - M[j]);
        cout << a << endl;
    }
    return 0;
}