#include <bits/stdc++.h>
using namespace std;
long factorial(long n){
    if (n<=1) return 1;
    return n*factorial(n-1);
}
int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    long n,m;
    cin>>n>>m;
    if(n>=m) cout<<"0\n";
    else cout<<(factorial(n))%m<<"\n";
}