Untitled

#include <iostream>
using namespace std;
int main()
{
	int a, b, c, d;
	cin >> a;
	d = 0;
	for (int i = 0; i < a; i++)
	{
		cin >> b >> c;
		d = 1440 - (b * 60) - c;
		cout << d << endl;
	}
}