Untitled

#include <iostream>
using namespace std;
int main()
{
	int t,h,m,i,rh,rm,r;
	cin >> t;
	for (i = 0; i < t; i++)
	{
		cin >> h >> m;
		rh = 24 - h -1 ;
		rm = 60 - m;
		r = rm + rh * 60;
		cout << r << "\n";
	}


}