#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;
using mint = modint998244353;
using vi = vector<int>;
using vvi = vector<vi>;
using vvvi = vector<vvi>;
using vll = vector<ll>;
using vvll = vector<vll>;
using vvvll = vector<vvll>;
using vmi = vector<mint>;
using vvmi = vector<vmi>;
using vvvmi = vector<vvmi>;
#define all(a) (a).begin(), (a).end()
#define rep2(i, m, n) for (int i = (m); i < (n); ++i)
#define rep(i, n) rep2(i, 0, n)
#define drep2(i, m, n) for (int i = (m)-1; i >= (n); --i)
#define drep(i, n) drep2(i, n, 0)


int main(){
    int n; ll x, m; cin >> n >> x >> m;
    vll a(n); rep(i, n)cin >> a[i];
    vll cnt(n, 0);
    rep(i, n){
        ll w = a[i];
        while(w >= x){
            cnt[i]++;
            w /= 2;
        }
    }
    ll mp = 0, mcnt = 0;
    drep(i, n){
        if(mcnt < cnt[i]){
            ll diff = cnt[i] - mcnt;
            mp += (ll)(i+1)*diff;
            mcnt += diff;
        }
    }cout << (mp <= m ? "Yes" : "No") << endl;

    return 0;
}