#include<bits/stdc++.h>
#define MOD 1<<20
using namespace std;
int n,p1,p2,p3,p;
int main()
{
    freopen("12perm.in","r",stdin);
    freopen("12perm.out","w",stdout);
    scanf("%d",&n);
    if(n==1)
    {
        printf("1\n");
    }
        else
    if(n==2)
    {
        printf("2\n");
    }
        else
    if(n==3)
    {
        printf("6\n");
    }
        else
    if(n==4)
    {
        printf("12\n");
    }
        else
    {
        p3=12;
        p2=6;
        p1=2;
        for(int i=5;i<=n;i++)
        {
            p=p1+p3+2*(i-1);
            p%=MOD;
            p1=p2;
            p2=p3;
            p3=p;
        }
        printf("%d\n",p);
    }
    return 0;
}