import java.util.Scanner;

class Main {
    public static void main(String[] args) {
        Scanner s = new Scanner(System.in);
        int n = s.nextInt(), m = s.nextInt();
        Integer[] arr = new Integer[n];
        int sum = 0;
        for (int i = 0; i < n; i++) {
            arr[i] = s.nextInt();
            sum += arr[i];
        }
        double div = (double) sum / (4*m);
        for(int i = 0; i < n && m > 0; i++) {
            if(arr[i] >= div) {
                m--;
            }
        }
        if(m <= 0) {
            System.out.println("Yes");
        } else {
            System.out.println("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