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];
      float sum = 0;
      int count = 0;
      for(int i = 0;i<n;i++){
         a[i] = sc.nextInt();
         sum += a[i];
      }
      for(int i = 0;i<n;i++){
         if(a[i]>=sum/(4*m)){
            count++;
            if(count>=m){
               System.out.println("Yes");
               return;
               }
            
         }
      }
     
       System.out.println("No");
   }
} import java.util.*; util.* java 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];
      float sum = 0;
      int count = 0;
      for(int i = 0;i<n;i++){
         a[i] = sc.nextInt();
         sum += a[i];
      }
      for(int i = 0;i<n;i++){
         if(a[i]>=sum/(4*m)){
            count++;
            if(count>=m){
               System.out.println("Yes");
               return;
               }
            
         }
      }
     
       System.out.println("No");
   }
} 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];
      float sum = 0;
      int count = 0;
      for(int i = 0;i<n;i++){
         a[i] = sc.nextInt();
         sum += a[i];
      }
      for(int i = 0;i<n;i++){
         if(a[i]>=sum/(4*m)){
            count++;
            if(count>=m){
               System.out.println("Yes");
               return;
               }
            
         }
      }
     
       System.out.println("No");
   } main {
		Scanner sc = new Scanner(System.in);
      int n = sc.nextInt();
      int m = sc.nextInt();
      int[] a = new int[n];
      float sum = 0;
      int count = 0;
      for(int i = 0;i<n;i++){
         a[i] = sc.nextInt();
         sum += a[i];
      }
      for(int i = 0;i<n;i++){
         if(a[i]>=sum/(4*m)){
            count++;
            if(count>=m){
               System.out.println("Yes");
               return;
               }
            
         }
      }
     
       System.out.println("No");
   } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc int m = sc.nextInt(); m sc.nextInt() sc.nextInt sc int[] a = new int[n]; a new int[n] n float sum = 0; sum 0 int count = 0; count 0 for(int i = 0;i<n;i++){
         a[i] = sc.nextInt();
         sum += a[i];
      } int i = 0; int i = 0; i 0 i<n i n i++ i++ i {
         a[i] = sc.nextInt();
         sum += a[i];
      } {
         a[i] = sc.nextInt();
         sum += a[i];
      } a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc sum += a[i] sum a[i] a i for(int i = 0;i<n;i++){
         if(a[i]>=sum/(4*m)){
            count++;
            if(count>=m){
               System.out.println("Yes");
               return;
               }
            
         }
      } int i = 0; int i = 0; i 0 i<n i n i++ i++ i {
         if(a[i]>=sum/(4*m)){
            count++;
            if(count>=m){
               System.out.println("Yes");
               return;
               }
            
         }
      } {
         if(a[i]>=sum/(4*m)){
            count++;
            if(count>=m){
               System.out.println("Yes");
               return;
               }
            
         }
      } if(a[i]>=sum/(4*m)){
            count++;
            if(count>=m){
               System.out.println("Yes");
               return;
               }
            
         } a[i]>=sum/(4*m) a[i] a i sum/(4*m) sum (4*m) 4 m {
            count++;
            if(count>=m){
               System.out.println("Yes");
               return;
               }
            
         } count++ count if(count>=m){
               System.out.println("Yes");
               return;
               } count>=m count m {
               System.out.println("Yes");
               return;
               } System.out.println("Yes") System.out.println System.out System System.out "Yes" return; System.out.println("No") System.out.println System.out System System.out "No" String[] args args 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];
      float sum = 0;
      int count = 0;
      for(int i = 0;i<n;i++){
         a[i] = sc.nextInt();
         sum += a[i];
      }
      for(int i = 0;i<n;i++){
         if(a[i]>=sum/(4*m)){
            count++;
            if(count>=m){
               System.out.println("Yes");
               return;
               }
            
         }
      }
     
       System.out.println("No");
   }
} 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];
      float sum = 0;
      int count = 0;
      for(int i = 0;i<n;i++){
         a[i] = sc.nextInt();
         sum += a[i];
      }
      for(int i = 0;i<n;i++){
         if(a[i]>=sum/(4*m)){
            count++;
            if(count>=m){
               System.out.println("Yes");
               return;
               }
            
         }
      }
     
       System.out.println("No");
   }
} Main
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];
      float sum = 0;
      int count = 0;
      for(int i = 0;i<n;i++){
         a[i] = sc.nextInt();
         sum += a[i];
      }
      for(int i = 0;i<n;i++){
         if(a[i]>=sum/(4*m)){
            count++;
            if(count>=m){
               System.out.println("Yes");
               return;
               }
            
         }
      }
     
       System.out.println("No");
   }
}
