#include <fstream>

using namespace std;

int n,i,p,p2;

ifstream fin ("patrate2.in");

ofstream fout ("patrate2.out");

int main (){

    fin>>n;
    if (n == 1){
        fout<<1;
        return 0;
    }
    p = (n+1)*n;
    p2 = 1;
    for (i=1;i<=p;i++)
        p2 *= n;
    fout<<p2/2;


    return 0;
}