#include<bits/stdc++.h>

using namespace std;

int main(){
  ios::sync_with_stdio(false);
  cin.tie(nullptr);

  long long n,x,m;
  cin >> n >> x >> m;
  vector<long long> a(n);
  for(auto &nx : a){cin >> nx;}
  long long ope=0,prev=0;
  for(int i=n-1;i>=0;i--){
    a[i]>>=prev;
    while(a[i]>=x){
      a[i]/=2;
      ope+=(i+1);
      prev++;
    }
  }
  if(ope<=m){cout << "Yes\n";}
  else{cout << "No\n";}
  return 0;
}