import sys

input = sys.stdin.buffer.readline


def solve(N, X, M, A):
    magic_sum = 0
    for i in range(N - 1, -1, -1):
        magic = 0
        a = A[i]
        while X <= a:
            magic += 1
            a >>= 1
        if magic_sum < magic:
            M -= (magic - magic_sum) * (i + 1)
            magic_sum = magic
    return M >= 0


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

print("Yes" if solve(N, X, M, A) else "No")