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