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 12.16.1) (judge verdict: Accepted)

function Main(inputs) {
	const inputlines = inputs.split("\n");
  	const firstline = inputlines[0].split(" ");
  	const votevalues = inputlines[1].split(" ").map(x => parseInt(x, 10));
  	const standard = 1 / (4 * firstline[1]);
  	let yes = 0; 
  
    let totalvotes  = function(arr) {
    	let sum = 0;
    	arr.forEach(function(elm) {
        	sum += elm;
    	});
    	return sum;
	};
  
  	const currentstandard = totalvotes(votevalues) * standard;
  
  	for (let i = 0; i < votevalues.length; i++){
      	if(votevalues[i] >= currentstandard){
          	yes++;
          	if(yes == firstline[1]){
              	console.log("Yes");
              	break;
            }
        }
    }
  	if(yes != firstline[1]){
        console.log("No");
    }
}
 
Main(require("fs").readFileSync("/dev/stdin", "utf8"));