#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  int t;
  cin >> t;
  while (t--) {
    int h, m;
    cin >> h >> m;
    cout << (60) * (23 - h) + (60 - m) << endl;
  }
  return 0;
}
