#include <bits/stdc++.h>
using namespace std;

int main() {
  int a, b, c, k;
  cin >>a >>b >>c >>k;
  string ret = "No";

  while (k>0 && b<=a) {k--; b*=2;}
  while (k>0 && c<=b) {k--; c*=2;}

  if (c>b && b>a) ret = "Yes";

  cout << ret << endl;
  return 0;
}