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