#include <bits/stdc++.h>

using namespace std;

long sumOfGroup(int k) {
    // Return the sum of the elements of the k'th group.
    if(k%2==0)
    {
        k=k/2;
        k=3*k;
        return pow(2,k);
    }
    else
    {
        return pow(3,k);
    }
}

int main() {
    int k;
    cin >> k;
    long answer = sumOfGroup(k);
    cout << answer << endl;
    return 0;
}