from collections import defaultdict
import math
import sys


def input():
    return sys.stdin.readline().strip()


def main():

    n, k = map(int, input().split())
    (*a,) = map(int, input().split())
    z = defaultdict(int)
    for i in a:
        z[i] += 1
    for i in range(1, n + 1):
        if z[0] + z[i] >= k:
            print("Yes")
            return
    print("No")


if __name__ == "__main__":
    main()