#include<bits/stdc++.h>
using namespace std;
int main(){
  int a,b,c,k,cnt=0;
  cin >> a >> b >> c >> k;
  while(a>=b){b*=2;cnt++;}
  while(b>=c){c*=2;cnt++;}
  if(cnt<=k)cout << "Yes" << endl;
  else cout << "No" << endl;
}