#include <stdio.h>
#define N 1048576
int n;
int t[5];
int main()
{
	freopen("12perm.in","r",stdin);
	freopen("12perm.out","w",stdout);
	scanf("%d",&n);
	int i,x,poz;
	t[1]=1;
	t[2]=2;
	t[3]=6;
	t[4]=12;
	if (n<=4)
		printf("%d\n",t[n]);
	else
	{
		poz=5;
		while (poz<=n)
		{
			x=(t[4]+t[2]+2*(poz-2))%N;
			t[2]=t[3];
			t[3]=t[4];
			t[4]=x;
			poz++;
		}
		printf("%d",x);
	}
	return 0;
}