import java.util.Arrays;
import java.util.Collections;
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Integer N = scanner.nextInt();
        Integer M = scanner.nextInt();
        Integer[] inputList = new Integer[N];
        Integer sum = 0;

        for (Integer i = 0; i < N; i++) {
            Integer vote = scanner.nextInt();
            inputList[i] = vote;
            sum += vote;
        }

        Arrays.sort(inputList, Collections.reverseOrder());
        if (inputList[M - 1] * 4 * M >= sum) {
            System.out.println("Yes");
        } else {
            System.out.print("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