#include <fstream>

using namespace std;

ifstream fin("joc.in");
ofstream fout("joc.out");

int main() {
  int x, n, a=0, ant=0;
  fin >> n >> x;
  ant = x;
  for (int i = 0; i < n; i++) {
    fin >> a;
    ant = x;
    if (a == 1) {
      x = x * 2;
    } else if (a == 2) {
      x = ant*3 + 1 + x;
    } else if (a == 3) {
      x = x / 2;
    }
  }
  fout << x;
  return 0;  
}