import sys
import collections
input = sys.stdin.readline
def read_values(): return tuple(map(int, input().split()))
def read_list(): return list(read_values())

def main():
    n, k = read_values()
    a = read_list()
    c = collections.Counter(a)
    # c0 = c[0]
    c0 = c.get(0,0)
    c[0] = 0
    print('YNeos'[c0+max(c.values())<k::2])
    
if __name__ == "__main__":
    main()