n,x,m = map(int,input().split())
a = list(map(int,input().split()))
now = 0
left = m
for i in range(n)[::-1]:
  ai = a[i]
  for _ in range(now):
    ai //= 2
  while left >= i+1 and ai >= x:
    left -= i+1
    now += 1
    ai //= 2
  if ai >= x: 
    print('No')
    exit()
print('Yes')