#include <bits/stdc++.h>
using namespace std;

int main() {
    int n;
    while (cin >> n) { // 注意 while 处理多个 case
        int result = 1; 
        if(n < 4){//小于4输出本身-1
            cout << n - 1 << endl;
        }
        else if(n == 4){
            cout << 4 << endl;
        }
        while (n > 4) {//尽可能地分割成3
            result *= 3;
            n -= 3;
        }
        result *= n;
        cout << result << endl;
    }
    return 0;
}
// 64 位输出请用 printf("%lld")