import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        double m = sc.nextDouble();
        double[] a = new double[n];
        double sum = 0.0;
        for (int i = 0; i < n; i++) {
            a[i] = sc.nextDouble();
            sum += a[i];
        }
        double ans = 0.0;
        double tmp = sum / (m * 4.0);
        for (int i = 0; i < n; i++) {
            if(a[i] >= tmp) ans++;
        }
        if(ans >= m) 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