#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf32 1000000001
#define Inf64 1000000000000000001


int main(){
	
	int N,K;
	cin>>N>>K;
	vector<int> c(N);
	int x = 0;
	rep(i,N){
		int a;
		cin>>a;
		if(a==0)x++;
		else c[a-1]++;
		
	}
	rep(i,N){
		if(c[i]+x>=K){
			cout<<"Yes"<<endl;
			return 0;
			}
			}
			cout<<"No"<<endl;
	return 0;
}