#include<cstdio>
using namespace std;
int n,v[10000],i,j;
void mul(int A[], int B)
{
      int i, t = 0;
      for (i = 1; i <= A[0] || t; i++, t /= 10)
              A[i] = (t += A[i] * B) % 10;
      A[0] = i - 1;
}
int main()
{
    freopen("patrate2.in","r",stdin);
    freopen("patrate2.out","w",stdout);
    scanf("%d",&n);
    v[0]=v[1]=1;
    for(i=1;i<=n*n;++i)
        mul(v,2);
        for(i=1;i<=n;++i)
            mul(v,i);
        for(i=v[0];i>=1;i--)
            printf("%d",v[i]);
        return 0;
}