
import java.util.Arrays;
import java.util.Scanner;

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

/**
 *
 * @author wnqmw
 */
public class Main {
    public static void main(String args[]){
        Scanner kb = new Scanner(System.in);
        int nums = kb.nextInt(), sel = kb.nextInt();

        int[] num = new int[nums];

        int total = 0, totalvotes = 0;
        for(int i = 0; i < nums; i++){
            num[i] = kb.nextInt();
            totalvotes += num[i];
        }

        Arrays.sort(num);
        float req = (float)(totalvotes)/(4*sel);
        for(int i = nums-1; i >= 0; i--){
            if(num[i] >= req){
                total++;
             //   if(total == sel){
             //       break;
             //   }
            }
        }

        if(total < sel){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        }


    }
}

/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