N,X,M = map(int,input().split())
A = list(map(int,input().split()))

import sys
now = 0
for i in range(N - 1,-1,-1):
    a = A[i]
    a >>= now
    count = 0
    while a >= X:
        count += 1
        a >>= 1
    if count * (i + 1) > M:
        print('No')
        exit()
    else:
        M -= count * (i + 1)
        now += count
print('Yes')