#pragma GCC optimize("Ofast")
#pragma GCC optimize(2)
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef string str;
typedef pair<ll,ll> pii;
#define F first
#define S second
#define pb push_back
#define pq priority_queue
#define all(x) (x).begin(),(x).end()
#define de_bug(x) cout << (x) << '\n'
#define loli(x) cout << (x) << ' '
#define yn(x) cout << (x==1?"Yes\n":"No\n")
#define PI 3.14159265358979323
#define lolicon ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0)
const ll max_n=1e5+10,mod1=1e9+7,mod2=998244353;
ll dx[8] = {1,0,0,-1,1,1,-1,-1};
ll dy[8] = {0,1,-1,0,1,-1,1,-1};
ll n,x,m,k,t,a,cnt[max_n];
vector<ll> v;

void solve(){
    cin >> n >> x >> m;
    for(ll i=0;i<n;i++){
        cin >> a;
        v.pb(a);
        for(ll j=a;j>=x;j=j/2){
            cnt[i]++;
        }
    }/*
    for(ll i=0;i<n;i++){
        cout << cnt[i] << ' ';
    }
    cout << '\n';*/
    ll now = 0;
    for(ll i=n-1;i>=0;i--){
        if(cnt[i]-now>0){
            m -= (cnt[i]-now)*(i+1);
            now = cnt[i];
        }
    }
    //cout << m << '\n';
    yn(m>=0);
}

int main(){
    lolicon;
    /*
    freopen("input.txt","r",stdin);
    freopen("output.txt","w",stdout);
    */
    //cin >> t;
    t = 1;
    for(ll i=1;i<=t;i++){
        //cout << "Case #"<<i<<": ";
        solve();
    }
}

/*
1 
2
*/