import sys
input=lambda:sys.stdin.readline().rstrip()
N,X,M=map(int,input().split())
A=list(map(int,input().split()))+[0]
for i in range(N-1,-1,-1):
	temp=0
	while A[i]>=X:
		A[i]//=2
		temp+=1
	A[i]=max(temp,A[i+1])
	M-=A[i]
print(["No","Yes"][M>=0])