#include "bits/stdc++.h"
#define REP(i,n) for(int i=0;i<n;++i)
#define put(a) cout << a << "\n"
using namespace std;
typedef long long ll;

ll n,m;

ll fact(ll n){
    if(n==0){
        return 1;
    }
    return n*fact(n-1)%m;
}

int main(){
    cin >> n >> m;
    put(fact(n));
    return 0;
}