from collections import Counter

N, K = map(int, input().split())
A = list(map(int, input().split()))

cnt = Counter(A)

a = None
for k, c in cnt.most_common():
    if k == 0:
        continue
    else:
        a = k
        break

if not a or a + cnt[0] >= K:
    print('Yes')
else:
    print('No')