import java.util.*;

public class Main{
    public static void main(String[] args){
        Scanner scan = new java.util.Scanner(System.in);
        int n = scan.nextInt();
        int m = scan.nextInt();
        Integer[] a = new Integer[n];
        int sum = 0;
        for(int i = 0; i < n; i++){
            a[i] = scan.nextInt();
            sum += a[i];
        }
        Arrays.sort(a, Comparator.reverseOrder());
        double min = (double) sum / (4 * m);
        System.out.println(a[m - 1] >= min ? "Yes" : "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