#include <cstdio>
using namespace std;
const int D=40000;
const int B=10000;
int a[D];
void prod(int v[],int val)
{   int i,r=0;
    for(i=1;i<=v[0] || r; ++i)
    {   v[i]=(val*v[i]+r);
        r=v[i]/B;
        v[i]=v[i]%B;
    }
    v[0]=i-1;
}
int main()
{   freopen("patrate2.in","r",stdin);
    freopen("patrate2.out","w",stdout);
    int n,i;
    a[0]=a[1]=1;
    scanf("%d",&n);
    for(i=2;i<n;++i) prod(a,i);
    for(i=2;i<=n*n;++i) prod(a,2);
    printf("%d",a[a[0]]);
    for(i=a[0]-1;i;--i)
        printf("%04d",a[i]);
    return 0;
}