#include <bits/stdc++.h>
using namespace std;
int solve() {
  int h, m;
  cin >> h >> m;
  cout << (23 - h) * 60 + 60 - m << "\n";
  return 0;
}
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  int t = 1;
  cin >> t;
  while (t--) {
    solve();
  }
  return 0;
}
