#include<iostream>
using namespace std;
int main()
{
	int a[10][10] = {1,1,1,1,1,1,1,1,1,1,
1,2,2,2,2,2,2,2,2,2,
1,2,3,3,3,3,3,3,3,3,
1,3,4,5,5,5,5,5,5,5,
1,3,5,6,7,7,7,7,7,7,
1,4,7,9,10,11,11,11,11,11,
1,4,8,11,13,14,15,15,15,15,
1,5,10,15,18,20,21,22,22,22,
1,5,12,18,23,26,28,29,30,30,
1,6,14,23,30,35,38,40,41,42};

  
	int T,M,N;
	cin>>T;
	while(T--)
	{
		cin>>M>>N;
		cout<<a[M-1][N-1]<<endl;

	
	}

	return 0;
}

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