import java.util.*;
import java.util.Collections;

class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    double M = sc.nextDouble();
    Double[] A = new Double[N];
    double sum = 0;
    String ret = "Yes";
    for(int i = 0; i < A.length; i++){
      A[i] = sc.nextDouble();
      sum += A[i];
    }
    Arrays.sort(A, Collections.reverseOrder());
    for(int i = 0; i < M; i++){
      if(A[i] < sum / (4 * M)){
        ret = "No";
        break;
      }
    }
    System.out.println(ret);
  }
}

/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