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");
      }
   }
	
} import java.util.Scanner; Scanner java.util 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");
      }
   }
	
} 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");
      }
   } main {
    	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");
      }
   } Scanner console = new Scanner(System.in); console new Scanner(System.in) int N = console.nextInt(); N console.nextInt() console.nextInt console int M = console.nextInt(); M console.nextInt() console.nextInt console int[] arr = new int[N]; arr new int[N] N for(int i = 0; i < N; i++){
         arr[i] = console.nextInt();
      } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
         arr[i] = console.nextInt();
      } {
         arr[i] = console.nextInt();
      } arr[i] = console.nextInt() arr[i] arr i console.nextInt() console.nextInt console int count = 0; count 0 int sum = 0; sum 0 for(int num : arr){
         sum += num;
      } int num arr {
         sum += num;
      } {
         sum += num;
      } sum += num sum num double min = sum / (4.0 * M); min sum / (4.0 * M) sum (4.0 * M) 4.0 M for(int num : arr){
         if((double)num >= min){
            count++;
         }
      } int num arr {
         if((double)num >= min){
            count++;
         }
      } {
         if((double)num >= min){
            count++;
         }
      } if((double)num >= min){
            count++;
         } (double)num >= min (double)num min {
            count++;
         } count++ count if(count >= M){
         System.out.println("Yes");
      }else{
         System.out.println("No");
      } count >= M count M {
         System.out.println("Yes");
      } System.out.println("Yes") System.out.println System.out System System.out "Yes" {
         System.out.println("No");
      } System.out.println("No") System.out.println System.out System System.out "No" String[] args args
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");
      }
   }
	
}