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