#include <iostream>

using namespace std;

int main(void)
{
	int a, b, c, k;
	cin >> a >> b >> c >> k;

	int t = 0;
	while (a >= b) {
		t++;
		b *= 2;
	}
	while (b >= c) {
		t++;
		c *= 2;
	}

	cout << (t <= k ? "Yes" : "No") << endl;
	
	return 0;
}