#include<iostream>
using namespace std;
long long int n,i,s=1,f=2;
int main()
{
    cin>>n;
    if(n>=2 && n<=1000000000)
    {
while(s%n && f<=n-1)
{
    s*=f;
    f++;
}
    cout<<s%n;
    }
return 0;
}