import java.util.Scanner;
import java.util.Arrays;
import java.util.Comparator;
class Main{
public static void main(String[] args){
 Scanner scan = new Scanner(System.in);
 
 int N = scan.nextInt();
 int M = scan.nextInt();
 int PV[] = new int[N];
 double b = 0;
 int count = 0;
  //4M分の1
  for (int i = 0; i < N; i++){
    int a = scan.nextInt();
    PV[i] = a;
        b = b + a;
  }
    b = b /( 4 * M ); 

  //M個選べるか
  for (int i = 0; i < N; i++){
   if ( PV[i] >= b ){
     count += 1;
   }
   else {
   }
  }

  if ( count >= M ){
    System.out.println("Yes");
  }
  else{
    System.out.println("No");
  }
 }
} import java.util.Scanner; Scanner java.util import java.util.Arrays; Arrays java.util import java.util.Comparator; Comparator java.util class Main{
public static void main(String[] args){
 Scanner scan = new Scanner(System.in);
 
 int N = scan.nextInt();
 int M = scan.nextInt();
 int PV[] = new int[N];
 double b = 0;
 int count = 0;
  //4M分の1
  for (int i = 0; i < N; i++){
    int a = scan.nextInt();
    PV[i] = a;
        b = b + a;
  }
    b = b /( 4 * M ); 

  //M個選べるか
  for (int i = 0; i < N; i++){
   if ( PV[i] >= b ){
     count += 1;
   }
   else {
   }
  }

  if ( count >= M ){
    System.out.println("Yes");
  }
  else{
    System.out.println("No");
  }
 }
} Main public static void main(String[] args){
 Scanner scan = new Scanner(System.in);
 
 int N = scan.nextInt();
 int M = scan.nextInt();
 int PV[] = new int[N];
 double b = 0;
 int count = 0;
  //4M分の1
  for (int i = 0; i < N; i++){
    int a = scan.nextInt();
    PV[i] = a;
        b = b + a;
  }
    b = b /( 4 * M ); 

  //M個選べるか
  for (int i = 0; i < N; i++){
   if ( PV[i] >= b ){
     count += 1;
   }
   else {
   }
  }

  if ( count >= M ){
    System.out.println("Yes");
  }
  else{
    System.out.println("No");
  }
 } main {
 Scanner scan = new Scanner(System.in);
 
 int N = scan.nextInt();
 int M = scan.nextInt();
 int PV[] = new int[N];
 double b = 0;
 int count = 0;
  //4M分の1
  for (int i = 0; i < N; i++){
    int a = scan.nextInt();
    PV[i] = a;
        b = b + a;
  }
    b = b /( 4 * M ); 

  //M個選べるか
  for (int i = 0; i < N; i++){
   if ( PV[i] >= b ){
     count += 1;
   }
   else {
   }
  }

  if ( count >= M ){
    System.out.println("Yes");
  }
  else{
    System.out.println("No");
  }
 } Scanner scan = new Scanner(System.in); scan new Scanner(System.in) int N = scan.nextInt(); N scan.nextInt() scan.nextInt scan int M = scan.nextInt(); M scan.nextInt() scan.nextInt scan int PV[] = new int[N]; PV new int[N] N double b = 0; b 0 int count = 0; count 0 for (int i = 0; i < N; i++){
    int a = scan.nextInt();
    PV[i] = a;
        b = b + a;
  } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
    int a = scan.nextInt();
    PV[i] = a;
        b = b + a;
  } {
    int a = scan.nextInt();
    PV[i] = a;
        b = b + a;
  } int a = scan.nextInt(); a scan.nextInt() scan.nextInt scan PV[i] = a PV[i] PV i a b = b + a b b + a b a b = b /( 4 * M ) b b /( 4 * M ) b ( 4 * M ) 4 M for (int i = 0; i < N; i++){
   if ( PV[i] >= b ){
     count += 1;
   }
   else {
   }
  } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
   if ( PV[i] >= b ){
     count += 1;
   }
   else {
   }
  } {
   if ( PV[i] >= b ){
     count += 1;
   }
   else {
   }
  } if ( PV[i] >= b ){
     count += 1;
   }
   else {
   } PV[i] >= b PV[i] PV i b {
     count += 1;
   } count += 1 count 1 {
   } 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;
import java.util.Arrays;
import java.util.Comparator;
class Main{
public static void main(String[] args){
 Scanner scan = new Scanner(System.in);
 
 int N = scan.nextInt();
 int M = scan.nextInt();
 int PV[] = new int[N];
 double b = 0;
 int count = 0;
  //4M分の1
  for (int i = 0; i < N; i++){
    int a = scan.nextInt();
    PV[i] = a;
        b = b + a;
  }
    b = b /( 4 * M ); 

  //M個選べるか
  for (int i = 0; i < N; i++){
   if ( PV[i] >= b ){
     count += 1;
   }
   else {
   }
  }

  if ( count >= M ){
    System.out.println("Yes");
  }
  else{
    System.out.println("No");
  }
 }
}