Problem:
Score : 200 points

Problem Statement

We have held a popularity poll for N items on sale. Item i received A_i votes.

From these N items, we will select M as popular items. However, we cannot select an item with less than \dfrac{1}{4M} of the total number of votes.

If M popular items can be selected, print Yes; otherwise, print No.

Constraints

1 \leq M \leq N \leq 100

1 \leq A_i \leq 1000

A_i are distinct.

All values in input are integers.

Input

Input is given from Standard Input in the following format:

N M
A_1 ... A_N

Output

If M popular items can be selected, print Yes; otherwise, print No.

Sample Input 1

4 1
5 4 2 1

Sample Output 1

Yes

There were 12 votes in total. The most popular item received 5 votes, and we can select it.

Sample Input 2

3 2
380 19 1

Sample Output 2

No

There were 400 votes in total. The second and third most popular items received less than \dfrac{1}{4\times 2} of the total number of votes, so we cannot select them. Thus, we cannot select two popular items.

Sample Input 3

12 3
4 56 78 901 2 345 67 890 123 45 6 789

Sample Output 3

Yes

Solution in C# (.NET Core 3.1.201) (judge verdict: Wrong Answer)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace AtCoder.Abc
{
    class QuestionH
    {
        public static void Main(string[] args)
        {
            var sw = new System.IO.StreamWriter(Console.OpenStandardOutput()) { AutoFlush = false };
            Console.SetOut(sw);

            // 整数配列の入力
            var num_NM= Console.ReadLine().Split(' ').Select(i => int.Parse(i)).ToArray();

            // 整数配列の入力
            var num_A = Console.ReadLine().Split(' ').Select(i => int.Parse(i)); //.ToArray();

            //総得票数
            var num_SumA = num_A.Sum();

            var temp = (num_SumA*10) / (4 * num_NM[1]);

            var num_SumM = num_A.Count(i => i * 10 > temp);

            if (num_SumM >= num_NM[1])
            {
                Console.WriteLine("Yes");
            }
            else if (num_SumM < num_NM[1])
            {
                Console.WriteLine("No");
            }

            Console.Out.Flush();
        }
    }
}