#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int main () {
    int N;
    cin >> N;
    ll X, M;
    cin >> X >> M;
    std::vector<ll> A(N);
    for (auto& a : A) {
        cin >> a;
    }
    int fl = N;
    while (1) {
        while (fl > 0 && A[fl - 1] < X) {
            fl --;
        }
        if (fl == 0) {
            cout << "Yes" << endl;
            return 0;
        }
        M -= (fl + 1);
        if (M < 0) {
            cout << "No" << endl;
            return 0;
        }
        for (int i = 0; i < fl; i ++) {
            A[i] /= 2;
        }
    }
}