n, k = map(int,input().split())
t = [0] * (n+1)
zero = 0
a = list(map(int,input().split()))
for i in range(n):
	if a[i] == 0:
		zero += 1
	else:
		t[a[i]] += 1

if max(t) + zero >= k:
	print("Yes")
else:
	print("No")