from itertools import groupby
n, k = map(int, input().split())
zero = 0
mx = 0
for x, it in groupby(sorted(map(int, input().split()))):
    cnt = len(list(it))
    if x == 0:
        zero = cnt
    else:
        mx = max(mx, cnt)
print('Yes' if mx + zero >= k else 'No')