#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i = 0; i < (int)n; i++)
using ll = long long;

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