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