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 JavaScript (node.js v5.12) (judge verdict: Wrong Answer)

process.stdin.resume();
process.stdin.setEncoding('utf8');
var input_string;

process.stdin.on('data', function (chunk) {
    input_string += chunk;
    var lines = input_string.split("\n");
    // const[n, m] = lines[0].split(' ');


    if (lines.length % 2 == 1) {
        const p = lines[0].split(' ');
        const n = p[0];
        const m = p[1];
        // console.log(n);
        // console.log(m);
        // console.log(p);
        const c = []
        c.push(lines[1].split(' ').map(value => parseInt(value)));
        var x = 0;
        var y = 0;
        for (var j = 0; j < n; j++) {
            y += c[0][j];
        }
        for (var i = 0; i < n; i++) {
            if (c[0][i] > (y / (4 * m))) {
                x += 1;
                if (x == m) {
                    console.log("Yes");
                }
            }
        }

        if (x < m) {
            console.log("No");
        }
    }
});