n,k=map(int,input().split())
L=list(map(int,input().split()))
d=dict()
for e in L:
	if e in d:
		d[e]+=1
	else:
		d[e]=1
M=0
for k,v in d.items():
	if k!=0:
		M=max(M,v)
d0=0
if 0 in d:
	d0=d[0]
print("Yes" if k<=d0+M else "No")