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