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

int main() {
    int n,x,m;
    cin >> n >> x >> m;
    vector<int>a(n);
    for(int i = 0; i < n; i++) {
        cin >> a[i];
    }
    int sum = 0,res = 0;
    for(int i = n-1; i >= 0; i--) {
        for(int j = 0; j < res; j++) {
            a[i] /= 2;
        }
        while(a[i] >= x) {
            sum += i+1;
            res++;
            a[i] /= 2;
        }
    }
    cout << ((sum > m)?"No":"Yes") << endl;
}