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

int main(){
	int N,M;
	cin>>N>>M;
	assert(N>=1&&N<=1000000000);
	assert(M>=1&&M<=100000);
	long long ans = 1;
	for(int i=1;i<=N;i++){
		ans=(long long)ans*i%M;
		if(ans==0)break;
	}
	
	cout<<ans<<endl;
	
	
	return 0;
}