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

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    int N;
    ll X, M;
    cin >> N >> X >> M;
    vector<ll> A(N);
    for (int i=0;i<N;i++) cin >> A[i];
    vector<ll> B(N);
	for (int i=N-1;i>=0;i--) {
        int cnt = 0;
        while (A[i] >= X) {
            A[i] /= 2;
            cnt++;
        }
        B[i] = cnt;
        if (i != N-1) B[i] = max(B[i], B[i+1]);
        M -= B[i];
    }

    if (M >= 0) {
        cout << "Yes" << "\n";
    } else {
        cout << "No" << "\n";
    }
    return 0;
}

// 21:27~