#include<bits/stdc++.h>
#include<atcoder/modint>
#define int long long
#define double long double
using namespace std;
using mint=atcoder::modint;
const int inf=1e18;

signed main(){
    int p;cin>>p;
    atcoder::modint::set_mod(p);
    mint cur=1;
    int pw=1;
    mint ans=0;
    for(int i=0;i<p;i++){
        pw*=-1;
        ans+=cur*pw;
        cur*=i+1;
    }
    // ans+=cur*pw;
    cout<<ans.val()<<endl;
}