N,K = map(int, input().split())
A = list(map(int, input().split()))
from collections import Counter

c = Counter(A)
d = c.most_common()

#print(c)
if len(d) == 1:
    ans = d[0][1]
else:
    if d[0][0] == 0:
        #print("a")
        ans = d[0][1] + d[1][1]

    else:
        ans = d[0][1] + c[0]
#print(ans)
if ans >= K:
    print("Yes")
else:
    print("No")