#include <fstream>
using namespace std;
const int MOD=9999991;

ifstream f("dirichlet.in");
ofstream g("dirichlet.out");

int ExpRapid(int n,int p){
    int val=1;
    while(p){
        if(p%2) val=1LL*val*n%MOD;
        n=1LL*n*n%MOD;
        p/=2;
    }
    return val%MOD;
}

int Comb(int n,int k){
    int val=1,inv=1;
    for(int i=1;i<=k;i++)
        val=1LL*val*(n-i+1)%MOD,inv=1LL*inv*i%MOD;
    inv=ExpRapid(inv,MOD-2);
    return 1LL*val*inv%MOD;
}

int main()
{
    int n,inv,val;
    f>>n;
    val=Comb(n*2,n);
    inv=ExpRapid(n+1,MOD-2);
    g<<1LL*val*inv%MOD;
    f.close();
    g.close();
    return 0;
}