#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
#define rep(i, n) for(int i=0;i<(n);++i)
#define rep1(i, n) for(int i=1;i<=(n);i++)
#define ll long long
using mint = modint998244353;
using P = pair<ll,ll>;
using lb = long double;
using T = tuple<ll, ll, ll>;
#ifdef LOCAL
#  include <debug_print.hpp>
#  define dbg(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__)
#else
#  define dbg(...) (static_cast<void>(0))
#endif

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