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();
        int[] A = new int[N];
        double Asum = 0;

        for (int i = 0; i < N; i++) {
            A[i] = sc.nextInt();
            Asum += A[i];
        }

        Asum=Asum/(4*M);

        Arrays.sort(A);

        for (int i = 0; i < M; i++) {
            if(A[A.length-1-i]>=Asum){
                continue;
            }else{
                System.out.println("No");
                System.exit(0);
            }
        }

        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