#include <iostream>
#include <cmath>

size_t count = 0;




int main(){

    int num;
    std::cin >> num;

    unsigned long long result = 1;

    for(int i = 2; i < num; i++){
        result *= 2;
        result %= 1000000007;
    }
    result = result*num/2;
    result %= 1000000007;

    std::cout << result << std::endl;





    return 0;
}