#include <iostream>

int main() {
    int n;
    std::cin >> n;

    if (n == 2) {
        std::cout << 1 << std::endl;
        return 0;
    }

    long long result = n;
    for (int i = 0; i < n - 3; i++) {
        result = (result * 2) % 1000000007ll;
    }

    std::cout << result << std::endl;
    return 0;
}