import java.util.*;
        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];
		int x=0;
		int aa=0;
		for(int i=0;i<n;i++){
			a[i] = sc.nextInt();
			aa+=a[i];
		}
		for(int i=0;i<n;i++){
			if(((double)aa/(4*m))<=a[i]){
				x++;
			}
		}
		if(m<=x){
			System.out.print("Yes");
		}else{
			System.out.print("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