import java.util.Scanner;
class Main{
	public static void main(String[] args){
    	Scanner console = new Scanner(System.in);
    	int N = console.nextInt();
      int M = console.nextInt();
      
      int[] arr = new int[N];
      for(int i = 0; i < N; i++){
         arr[i] = console.nextInt();
      }
      int count = 0;
      int sum = 0;
      for(int num : arr){
         sum += num;
      }
      double min = sum / (4.0 * M);
      for(int num : arr){
         if((double)num >= min){
            count++;
         }
      }
      if(count >= 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