N, X, M = gets.split.map(&:to_i)
A = gets.split.map(&:to_i)

cur = 0
cost = 0

(N - 1).downto(0) do |i|
  a = A[i]
  cur.times do
    a /= 2
  end

  while a >= X
    a /= 2
    cur += 1
    cost += i + 1
  end
end

if cost <= M
  puts 'Yes'
else
  puts 'No'
end