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

public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        // 配列
        int[] a = new int[n];
        int sum = 0;
        for(int i=0;i<n;i++){
            a[i] = sc.nextInt();
            sum+=a[i];
        }
        Arrays.sort(a);

        for (int i = n-1;i > n-1-m;i--) {
            if(a[i] * 4 * m < sum) {
                System.out.println("No");
                return;
            }
        }
        System.out.println("Yes");
    }
}

/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