n,x = map(int,input().split())
a = list(map(int,input().split()))
a.sort()
t_1 = False
t_2 = False
for i in range(n):
    if a[i] <= x:
        t_1 = True
    if a[i] >= x:
        t_2 = True
if t_1 and t_2:
    print("Yes")
else:
    print("No")