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

public class Main {
    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int M=sc.nextInt();
        float sum=0;
        Integer[] arr=new Integer[N];
        for(int i=0;i<N;i++){
            arr[i]=sc.nextInt();
            sum=sum+arr[i];
        }
        int flag=1;
//        System.out.println(sum);
        Arrays.sort(arr, Collections.reverseOrder());
        Float l=(sum/(4*M));
//        System.out.println(l);

        for (int i=0;i<M;i++){
//            System.out.println(arr[i]);
            if(arr[i] < l){
                flag=0;
                break;
            }
        }
        if (flag==1)
            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