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


wild_card_num = A.count(0)
num_list = []
for i in range(1, N + 1):
    num_list.append(A.count(i))

max_num = max(num_list)

if max_num + wild_card_num >= K:
    print('Yes')
else:
    print('No')