#include <bits/stdc++.h>
using namespace std;

int main() {
    int a, b, c, k;
    cin >> a >> b >> c >> k;
    while(a >= b)
        b += b, k--;
    while(b >= c)
        c += c, k--;
    cout << (k < 0 ? "No" : "Yes") << endl;
    return 0;
}
