#include <bits/stdc++.h>
using namespace std;
int main() {
  int t;
  cin >> t;
  while (t--) {
    int a, b;
    cin >> a >> b;
    int h = 23 - a;
    int m = 60 - b;
    cout << (h * 60) + m << endl;
  }
  return 0;
}
