//package cf;

import java.util.*;
import java.io.*;
class Main {
    public static void main(String[] args) throws IOException {
        Scanner io = new Scanner(System.in);
        int n = io.nextInt(), m = io.nextInt();
        int c = 0, s = 0;
        int[] arr = new int[n];
        for(int i = 0; i < n; i++)
            s += (arr[i] = io.nextInt());
        for(int i = 0; i < n; i++)
            if((double)arr[i] >= (double)s/4/m) c++;
        System.out.println(c >= m ? "Yes" : "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