#include <fstream>
#define mod 1048576
using namespace std;
ifstream cin("12perm.in");
ofstream cout("12perm.out");
int dp[15500005];
int main()
{
    int n;
    cin>>n;
    dp[1]=1;
    dp[2]=2;
    dp[3]=6;
    for(int i=4;i<=n;++i)
    {
        dp[i]=(dp[i-1]+6*dp[i-3])%mod;
    }
    cout<<dp[n];
    return 0;
}