import java.util.*;

public class Main {
    public static void main(String[] args) {
        Main main = new Main();
        main.run();
    }
    
    // 変数一覧
    int n;
    int m;
    int[] a;
    double total;
    double vote;
    boolean res = true;

    public void run() {
        // 入力情報取得
        Scanner sc = new Scanner(System.in);
        n = sc.nextInt();
        m = sc.nextInt();
        a = new int[n+1];
        for (int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
            total += a[i];
        }
        sc.close();
        
        // 解答処理
        solve();
    }
    
    private void solve() {
        vote = total / (4 * m);
        a = sort(a, 1);

        for (int i = 0; i < m; i++) {
            if (vote > a[i]) {
                res = false;
            }
        }
        if (res) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }

    // 配列ソート(0:ASC 1:DESC)
    private int[] sort(int[] l, int flg) {
        ArrayList list = new ArrayList();
        for (int i = 0; i < l.length; i++) {
            list.add(l[i]);
        }
        // 昇順
        if (flg == 0)
            list.sort(Comparator.naturalOrder());
        // 降順
        if (flg == 1)
            list.sort(Comparator.reverseOrder());
        for (int i = 0; i < list.size(); i++) {
            l[i] = (int) list.get(i);
        }
        return l;
    }
}

/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