#include <bits/stdc++.h>
using namespace std;



int main(){
	int N,M;
	cin>>N>>M;
	int ans = 1;
	for(int i=1;i<=N;i++){
		ans=(long long)ans*i;
		ans%=M;
	}
	cout<<ans<<endl;
	
	
	return 0;
}