package main

import . "fmt"

func main() {
	var n,k int
	Scan(&n,&k)
	m:=make([]int,n+1)
	for _=range m[1:] {
		var a int
		Scan(&a)
		m[a]++
	}
	for _,x:=range m[1:] {
		if x+m[0]>=k {
			Println("Yes")
			return
		}
	}
	Println("No")
}