"""

"""

import sys
from sys import stdin

N,X,M = map(int,stdin.readline().split())

A = list(map(int,stdin.readline().split()))


B = []

for i in range(N):

    cnt = 0
    while A[i] >= X:
        cnt += 1
        A[i] //= 2

    B.append(cnt)

B.append(0)

for i in range(N-1,-1,-1):
    B[i] = max(B[i],B[i+1])

for i in range(N):
    M -= (B[i]-B[i+1]) * (i+1)

#print (B,M)

if M >= 0:
    print ("Yes")
else:
    print ("No")