#include<bits/stdc++.h>
using namespace std;
int main() {
  int N, K;
  cin >> N >> K;
  vector<int> A(N);
  vector<int> cnt(N + 1);
  for (int i = 0; i < N; i++) {
    cin >> A[i];
    cnt[A[i]]++;
  }
  bool ok = false;
  for (int i = 1; i <= N; i++) {
    if (cnt[i] + cnt[0] >= K) ok = true;
  }
  cout << (ok ? "Yes" : "No") << endl;
}