#include <bits/stdc++.h>
using namespace std;
#define int long long
signed main(){
  int N,M,X;
  cin>>N>>M>>X;
  vector<int> S(N);
  for(int i=0;i<N;i++) cin>>S[i];
  int now = 1;
  for(int i=N-1;i>=0;i--){
      while(M > i && X <= S[i]/now){
          now *= 2;
          M -= i+1;
      }
      if(S[i]/now >= X){
          cout<<"No"<<endl;
          return 0;
      }
  }
  cout<<"Yes"<<endl;
}