#include <bits/stdc++.h>
using namespace std;
int main() {
// your code goes here
long long int t,n,i,j,k,g,h,m,o,p;
vector<int> a,b;
cin>>t;
while(t--)
{
cin>>n>>m;
g=24-n;
g=g*60-m;
cout<<g<<"\n";
}
return 0;
}
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