#include <cstdio>
#include <cstdlib>
#include <cstddef>
#include <vector>
#include <algorithm>
#include <cmath>
#include <string>
#include <iostream>
#include <iomanip>

#define ASDF (1000000007)

int main(void)
{
	long n;
	std::cin >> n;
    if(n == 1){
        std::cout << 2 << std::endl;
    } else if(n == 2){
        std::cout << 4 << std::endl;
    } else if(n == 3){
        std::cout << 12 << std::endl;
    } else {
        long tot = 1 + (n % 2) * 2;//1(even) or 3(odd)
        // tot * 4 * 5^([n/2] - 1)
        tot *= 4;
        long cnt = n / 2 - 1;
        for(long i = 0; i < cnt; i++){
            tot = (tot * 5) % ASDF;
        }
        std::cout << tot << std::endl;
    }
	return 0;
}