题解 | 小A取石子

n, k = map(int, input().split())
arr = list(map(int, input().split()))

xor_sum = 0
for x in arr:
    xor_sum ^= x

if xor_sum != 0:
    print("YES")
else:
    # xor_sum == 0
    if k > 0 and any(x >= k for x in arr):
        print("YES")
    else:
        print("NO")