#include<bits/stdc++.h>

using namespace std;

typedef long long int64;

int64 pow_mod(int64 x, int64 n, int64 mod)
{
  int64 ret = 1;
  while(n > 0) {
    if(n & 1) (ret *= x) %= mod;
    (x *= x) %= mod;
    n >>= 1;
  }
  return ret;
}

const int mod = 1e9 + 7;

int main()
{
  int64 N;
  cin >> N;
  if(N == 1) {
    cout << 2 << endl;
  } else if(N == 2) {
    cout << 4 << endl;
  } else if(N == 3) {
    cout << 12 << endl;
  } else if(N % 2 == 0LL) {
    N /= 2;
    --N;
    cout << pow_mod(5, N, mod) * 4 % mod << endl;
  } else {
    N /= 2;
    --N;
    cout << pow_mod(5, N, mod) * 3 * 4 % mod << endl;
  }
}