import java.util.Scanner;
class Main{
  public static void main(String[] args){
    Scanner stdIn = new Scanner(System.in);
    int N = stdIn.nextInt();
    double M = stdIn.nextDouble();
    Double X = 4*M;
    Double Y = 1/X;
    int[] s = new int[N];
    for (int i = 0; i<N; i++){
      s[i] = stdIn.nextInt();
    }
    int G = 0;
    for(int i = 0; i<N; i++){
      G += s[i];
    }
    int Sum = 0;
    for(int i = 0; i<N; i++){
      if(s[i]>=G*Y){
        Sum += 1;
      }
    }
    if(Sum >= M){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
  }
}
/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