#include <bits/stdc++.h>
using namespace std;
int main(){
  int N, X, M;
  cin >> N >> X >> M;
  vector<int> A(N);
  for (int i = 0; i < N; i++){
    cin >> A[i];
  }
  for (int i = N - 1; i >= 0; i--){
    while (A[i] >= X){
      for (int j = 0; j <= i; j++){
        A[j] /= 2;
      }
      M -= i + 1;
    }
  }
  if (M >= 0){
    cout << "Yes" << endl;
  } else {
    cout << "No" << endl;
  }
}