#include <bits/stdc++.h>
using namespace std;

using ll = long long;
#define rep(i, n) for(int i = 0; i < n; i++)

int main() {
	int N, K;
	cin >> N >> K;
	vector<int> a(N);
	rep(i, N) cin >> a[i];
	vector<int> v(N + 1);
	rep(i, N) v[a[i]]++;
	K -= v[0];
	string ans = "No";
	for(int i = 1; i < N + 1; i++) if(v[i] >= K) ans = "Yes";
	cout << ans << endl;
}