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

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

int main() {
  int N, K;
  cin >> N >> K;
  vector<int> A(N);
  vector<int> mark(N+1, 0);
  rep(i, N) {
    int Ai;
    cin >> Ai;
    mark[Ai]++;
  }
  bool ans = false;
  rep(i, N+1) {
    if (i == 0) {
      if (mark[i] >= K)
	ans = true;
    } else {
      if (mark[i] + mark[0] >= K)
	ans = true;
    }
  }
  if (ans)
    cout << "Yes" << endl;
  else
    cout << "No" << endl;
  return 0;
}