n, x, m = map(int, input().split())
A = list(map(int, input().split()))
ma = 0
for i, a in enumerate(A, 1):
    k = 0
    while a >= x:
        a //= 2
        k += 1
    ma = max(ma, k * i)
if ma <= m:
    print("Yes")
else:
    print("No")