import java.util.*;
import java.io.*;
public class Main {
    public static void main(String[] args) throws Exception{
        
        Scanner sc = new Scanner(System.in);
        int tests;
        int n;
        int m;
      int l;
      double sum=0;
         n = sc.nextInt();
      m = sc.nextInt();
        int[] A = new int[n];
       
       
      for(int i=0;i<n;i++){
        A[i]= sc.nextInt();
         sum = sum+A[i];
      }
      int count=0;
      int reqd = (int)Math.ceil(sum/(4*m));
      for(int i=0;i<n;i++){
       if(A[i] >= reqd){
         count++;
       }
        
      }
          if(count>=m){
            System.out.println("Yes");
          }
          else{
             System.out.println("No");
          }
       
       
        
  }
}
         import java.util.*; util.* java import java.io.*; io.* java public class Main {
    public static void main(String[] args) throws Exception{
        
        Scanner sc = new Scanner(System.in);
        int tests;
        int n;
        int m;
      int l;
      double sum=0;
         n = sc.nextInt();
      m = sc.nextInt();
        int[] A = new int[n];
       
       
      for(int i=0;i<n;i++){
        A[i]= sc.nextInt();
         sum = sum+A[i];
      }
      int count=0;
      int reqd = (int)Math.ceil(sum/(4*m));
      for(int i=0;i<n;i++){
       if(A[i] >= reqd){
         count++;
       }
        
      }
          if(count>=m){
            System.out.println("Yes");
          }
          else{
             System.out.println("No");
          }
       
       
        
  }
} Main public static void main(String[] args) throws Exception{
        
        Scanner sc = new Scanner(System.in);
        int tests;
        int n;
        int m;
      int l;
      double sum=0;
         n = sc.nextInt();
      m = sc.nextInt();
        int[] A = new int[n];
       
       
      for(int i=0;i<n;i++){
        A[i]= sc.nextInt();
         sum = sum+A[i];
      }
      int count=0;
      int reqd = (int)Math.ceil(sum/(4*m));
      for(int i=0;i<n;i++){
       if(A[i] >= reqd){
         count++;
       }
        
      }
          if(count>=m){
            System.out.println("Yes");
          }
          else{
             System.out.println("No");
          }
       
       
        
  } main {
        
        Scanner sc = new Scanner(System.in);
        int tests;
        int n;
        int m;
      int l;
      double sum=0;
         n = sc.nextInt();
      m = sc.nextInt();
        int[] A = new int[n];
       
       
      for(int i=0;i<n;i++){
        A[i]= sc.nextInt();
         sum = sum+A[i];
      }
      int count=0;
      int reqd = (int)Math.ceil(sum/(4*m));
      for(int i=0;i<n;i++){
       if(A[i] >= reqd){
         count++;
       }
        
      }
          if(count>=m){
            System.out.println("Yes");
          }
          else{
             System.out.println("No");
          }
       
       
        
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int tests; tests int n; n int m; m int l; l double sum=0; sum 0 n = sc.nextInt() n sc.nextInt() sc.nextInt sc m = sc.nextInt() m sc.nextInt() sc.nextInt sc int[] A = new int[n]; A new int[n] n for(int i=0;i<n;i++){
        A[i]= sc.nextInt();
         sum = sum+A[i];
      } int i=0; int i=0; i 0 i<n i n i++ i++ i {
        A[i]= sc.nextInt();
         sum = sum+A[i];
      } {
        A[i]= sc.nextInt();
         sum = sum+A[i];
      } A[i]= sc.nextInt() A[i] A i sc.nextInt() sc.nextInt sc sum = sum+A[i] sum sum+A[i] sum A[i] A i int count=0; count 0 int reqd = (int)Math.ceil(sum/(4*m)); reqd (int)Math.ceil(sum/(4*m)) Math.ceil Math sum/(4*m) sum (4*m) 4 m for(int i=0;i<n;i++){
       if(A[i] >= reqd){
         count++;
       }
        
      } int i=0; int i=0; i 0 i<n i n i++ i++ i {
       if(A[i] >= reqd){
         count++;
       }
        
      } {
       if(A[i] >= reqd){
         count++;
       }
        
      } if(A[i] >= reqd){
         count++;
       } A[i] >= reqd A[i] A i reqd {
         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 public class Main {
    public static void main(String[] args) throws Exception{
        
        Scanner sc = new Scanner(System.in);
        int tests;
        int n;
        int m;
      int l;
      double sum=0;
         n = sc.nextInt();
      m = sc.nextInt();
        int[] A = new int[n];
       
       
      for(int i=0;i<n;i++){
        A[i]= sc.nextInt();
         sum = sum+A[i];
      }
      int count=0;
      int reqd = (int)Math.ceil(sum/(4*m));
      for(int i=0;i<n;i++){
       if(A[i] >= reqd){
         count++;
       }
        
      }
          if(count>=m){
            System.out.println("Yes");
          }
          else{
             System.out.println("No");
          }
       
       
        
  }
} public class Main {
    public static void main(String[] args) throws Exception{
        
        Scanner sc = new Scanner(System.in);
        int tests;
        int n;
        int m;
      int l;
      double sum=0;
         n = sc.nextInt();
      m = sc.nextInt();
        int[] A = new int[n];
       
       
      for(int i=0;i<n;i++){
        A[i]= sc.nextInt();
         sum = sum+A[i];
      }
      int count=0;
      int reqd = (int)Math.ceil(sum/(4*m));
      for(int i=0;i<n;i++){
       if(A[i] >= reqd){
         count++;
       }
        
      }
          if(count>=m){
            System.out.println("Yes");
          }
          else{
             System.out.println("No");
          }
       
       
        
  }
} Main
import java.util.*;
import java.io.*;
public class Main {
    public static void main(String[] args) throws Exception{
        
        Scanner sc = new Scanner(System.in);
        int tests;
        int n;
        int m;
      int l;
      double sum=0;
         n = sc.nextInt();
      m = sc.nextInt();
        int[] A = new int[n];
       
       
      for(int i=0;i<n;i++){
        A[i]= sc.nextInt();
         sum = sum+A[i];
      }
      int count=0;
      int reqd = (int)Math.ceil(sum/(4*m));
      for(int i=0;i<n;i++){
       if(A[i] >= reqd){
         count++;
       }
        
      }
          if(count>=m){
            System.out.println("Yes");
          }
          else{
             System.out.println("No");
          }
       
       
        
  }
}
        
