#include <iostream>
using namespace std;
typedef unsigned long long UL;
int main(int argc, char* argv[])
{
	UL N;
	cin>>N;
	const UL MOD=1000000007;
	if (N==1){
		cout<<2<<endl;
		return 0;
	}
	UL n=N/2;
	UL i;
	UL aw;
	aw=4;
	if (N%2==1){
		for (i=1;i<n;i++){
			aw*=5;
			aw%=MOD;
		}
		aw*=3;
		aw%=MOD;
	}else{
		for (i=1;i<n;i++){
			aw*=5;
			aw%=MOD;
		}
	}
	cout<<aw<<endl;
	return 0;
}