n, x, m = map(int, input().split())
A = list(map(int, input().split()))

C = [0 for _ in range(n)]
for i in range(n):
    a = A[i]
    cnt = 0
    while a >= x:
        cnt += 1
        a //= 2
    C[i] = cnt
res = 0
for i in range(n - 1, -1, -1):
    C[i] = max(0, C[i] - res)
    m -= C[i] * (i + 1)
    res += C[i]
if m >= 0:
    print("Yes")
else:
    print("No")