N, X, M = map(int, input().split())
A = list(map(int, input().split()))
for i in range(N - 1, -1, -1):
    while A[i] >= X:
        for j in range(i + 1):
            A[j] //= 2
        M -= i + 1
        if M < 0:
            print("No")
            exit()
print("Yes")