import java.util.Scanner;

class Main{
  public static void main(String[] args){
    Scanner scan = new Scanner(System.in);
    int n = scan.nextInt();
    int m = scan.nextInt();
    int sum = 0;
    int count = 0;
    int[] pop = new int[n];
    for(int i = 0; i < n; i++){
      pop[i] = scan.nextInt();
    }
    for(int i = 0; i < n; i++){
      sum += pop[i];
    }
    int M = 4*m;
    //double border = sum/M;
    for(int i = 0; i<n; i++){
      if(pop[i]*M >= sum){
        count++;
      }
    }
     if(count >= 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