CodeForces-1283A.cpp

//
// Created by abdob on 10/23/2022.
//
#include <bits/stdc++.h>

using namespace std;

int main() {

    int q;
    scanf("%d", &q);
    for (int i = 0; i < q; ++i) {
        int h, m;
        scanf("%d %d", &h, &m);
        printf("%d\n", 1440 - h * 60 - m);
    }

    return 0;
}