#include <iostream>
#include <cmath>

using namespace std;

int main() {
  int n;
  cin >> n;
  int a[n];
  int odd_patt = 1;
  for (int i = 0; i < n; i++) {
    cin >> a[i];
    if (a[i] % 2 == 0) odd_patt *= 2;
  }
  
  cout << pow(3, n) - odd_patt << endl;
}
