백준 1010

백준 1010

#include<iostream>


long long Comb(int n, int m)
{
	long long value = 1;
	int r = 1;
	for (int i = m; i > m-n; i--)//n번 반복
	{
		value *= i;
		value /= r++; 			//r은 n까지 증가

	}

	return value;
}

int main()
{
	int times_number;
	std::cin >> times_number;

	for (int j = 0; times_number > j; j++)
	{
		int n, m;
		std::cin >> n >> m;
		std::cout << Comb(n, m)<<"\n";
	}
}