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

ct = [0]*N
for i, a in enumerate(A):
    while a >= X:
        a >>= 1
        ct[i] += 1

s = [[N, ct[-1]]]
for i in range(N-2, -1, -1):
    if ct[i] > ct[i+1]:
        s.append([i+1, ct[i]])
    ct[i] = max(ct[i], ct[i+1])

v = 0
for i in range(len(s)):
    n, x = s[i]
    if i:
        x -= s[i-1][1]
    v += n*x

print('Yes' if v <= M else 'No')