#include <cstdio>
#include <cstring>
#include <cmath>
#include <algorithm>
#include <string>
#include <vector>
#include <iostream>
#include <stdlib.h>
using namespace std;

long long int N = 1000000007;
int main()
{
  long long int n;
  cin >> n;
  long long int ans = 1;

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

  if(n%2 == 0){
    for(int i=1;i<n/2;i++){
      ans = ( ans * 5 ) % N;
    }
    ans = (ans * 4 ) % N;
  }
  else{
    ans *= 3;
    for(int i=1;i<n/2;i++){
      ans = ( ans * 5 ) % N;
    }
    ans = (ans * 4 ) % N;
  }

  cout << ans << endl;

  return 0;
}