n,x=map(int,input().split())
c=list(map(int,input().split()))
pl=0
mi=0
ona=0
for a in c:
    if a>x:
        pl+=1
    elif a<x:
        mi+=1
    else:
        ona+=1

print("Yes" if (pl>0 and mi>0) or ona>0 else "No")