#include <iostream>

int main()
{
    std::cin.sync_with_stdio(false);
    std::cin.tie(nullptr);

    unsigned int N;
    std::cin >> N;

    unsigned int a = 2;
    unsigned int b = 4;
    unsigned int c = 10;

    char x = 1;

    for (int n = 3; n < N; n += 3)
    {
        a = 2 * (c + a);
        b = 2 * (a + b);
        c = 2 * (b + c);

        if (a > 20210108) {
            x = a / 20210108;
            a -= 20210108 * x;
        }
        if (b > 20210108)
            b -= 20210108 * x;
        if (c > 20210108)
            c -= 20210108 * x;
    }

    switch (N >= 3 ? N % 3 : N)
    {
    case 0:
        std::cout << c;
        break;
    case 1:
        std::cout << a;
        break;
    case 2:
        std::cout << b;
        break;
    }
}