import java.util.*;
public class Main{
	public static void main(String[] args){
    	Scanner scanner = new Scanner(System.in);
      	int n = scanner.nextInt();
      	double m = scanner.nextFloat();
      	int total = 0;
      	int[] a = new int[n];
      	for(int i =0; i<n; i++){
        	a[i] = scanner.nextInt();
          	total += a[i];
        }
      	int num = 0;
      	for(int i =0; i<n; i++){
        	if(a[i] >= total/(4*m)){num += 1;}
        }
      if(num >= m){
      	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