#include <bits/stdc++.h>

using namespace std;

int A, B, C, k;

int main() {
	cin >> A >> B >> C >> k;
	while(k-- && (A >= B || B >= C)) {
		if(A >= B) B <<= 1;
		else C <<= 1;
	}
	if(A < B && B < C) puts("Yes");
	else puts("No");
	return 0;
}