#include <iostream>
#include <cmath>
using namespace std;

int n,i;
long long int fact=1;


int main()
{
    cin>>n;
    for (i=1;i<=n-1;i++)
    {
        fact*=i;
        while (fact>=n)
          fact-=n;
    }
    cout<<fact;
    return 0;
}