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

int main() {
  int A,B,C,K;
  cin >> A >> B >> C >> K;
  int count =0;
  
  while(A>=B) {count++; B *=2;}
  while(B>=C) {count++; C *=2;}
  
  if(count <=K) cout << "Yes" << endl;
  else cout << "No" << endl;

}