import java.util.*;
public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    int M = sc.nextInt();
    double sum = 0;
    ArrayList<Integer> list = new ArrayList<Integer>();
    int count = 0;
    String ans;
    for (int i=0; i<N; i++) {
      int num = sc.nextInt();
      list.add(num);
      sum += num;
    }
    
    Collections.sort(list,Collections.reverseOrder());

    for (int i=0; i<N; i++) {
      if (list.get(i) < sum/(4*M)) {
        count = i;
        break;
      } else if (i == N-1) {
        count = N;
        break;
      }
    }
    if (count >= M)
      ans = "Yes";
    else
      ans = "No";
    
    System.out.println(ans);
  }
}  
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz