#include <iostream>
#include <vector>
#include <string>
#include <cmath>
#include <algorithm>
#include <utility>
#include <queue>
#include <set>
#include <map>
#include <deque>
#include <iomanip>
#include <cstdio>
#include <stack>
#include <numeric>

using namespace std;
typedef  long long ll;
typedef pair<int,int> PII;
typedef vector<int> VI;
typedef vector<VI> VVI;
#define  MP make_pair
#define  PB push_back
#define inf 1000000007
#define mod 1000000007
#define rep(i,n) for(int i=0;i<(int)(n);++i)

int main(){
    ll n,m;
    cin >> n >> m;
    if(n>=m){
        cout << 0 << endl;
    }else{
        ll ans = 1;
        for(ll i=1;i<=n;i++){
            ans *= i;
            ans %= m;
        }
        cout << ans << endl;
    }
    return 0;
}