백준 10872 c++

#include <iostream>

using namespace std;

int main(void)
{
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cout.tie(NULL);

	int N, result = 1;

	cin >> N;
	for (int i = N; i > 0; i--)
	{
		result = result * i;
	}
	cout << result << "\n";

	return 0;
}