import java.io.*;
import java.lang.*;
import java.util.*;
public class Main{
    public static void main(String[] args) throws IOException{
        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
        String[] str=br.readLine().split(" ");
        int N=Integer.parseInt(str[0]);
        int M=Integer.parseInt(str[1]);
        int[] arr=new int[N];
        double sum=0;
        StringTokenizer st=new StringTokenizer(br.readLine()," ");
        for(int i=0;i<N;i++) sum+=(arr[i]=Integer.parseInt(st.nextToken()));
        Arrays.sort(arr);
        boolean flag=true;
        for(int i=1;i<=M;i++){
            if(4*M*arr[N-i]<sum){
                flag=false;
                break;
            }
        }
        if(flag) 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