import java.util.Scanner;
public class Main{
 public static void main(String[] args) {
   Scanner kbd = new Scanner(System.in);
   int n =kbd.nextInt();
  double m =kbd.nextInt();
   int[] A= new int[n];
   for(int i=0;i<n;i++){
     A[i]=kbd.nextInt();
}
double s=0;
   for(int i=0;i<n;i++){
     s=s+A[i];
   }
   int c =0;
   double p=s/(4*m);
   for(int i=0;i<n;i++){
     if(A[i]>=p){
   c=c+1;
 }
}
 if(c>=m){
 System.out.println("Yes");
}else{
  System.out.println("No");
}
}
} import java.util.Scanner; Scanner java.util public class Main{
 public static void main(String[] args) {
   Scanner kbd = new Scanner(System.in);
   int n =kbd.nextInt();
  double m =kbd.nextInt();
   int[] A= new int[n];
   for(int i=0;i<n;i++){
     A[i]=kbd.nextInt();
}
double s=0;
   for(int i=0;i<n;i++){
     s=s+A[i];
   }
   int c =0;
   double p=s/(4*m);
   for(int i=0;i<n;i++){
     if(A[i]>=p){
   c=c+1;
 }
}
 if(c>=m){
 System.out.println("Yes");
}else{
  System.out.println("No");
}
}
} Main public static void main(String[] args) {
   Scanner kbd = new Scanner(System.in);
   int n =kbd.nextInt();
  double m =kbd.nextInt();
   int[] A= new int[n];
   for(int i=0;i<n;i++){
     A[i]=kbd.nextInt();
}
double s=0;
   for(int i=0;i<n;i++){
     s=s+A[i];
   }
   int c =0;
   double p=s/(4*m);
   for(int i=0;i<n;i++){
     if(A[i]>=p){
   c=c+1;
 }
}
 if(c>=m){
 System.out.println("Yes");
}else{
  System.out.println("No");
}
} main {
   Scanner kbd = new Scanner(System.in);
   int n =kbd.nextInt();
  double m =kbd.nextInt();
   int[] A= new int[n];
   for(int i=0;i<n;i++){
     A[i]=kbd.nextInt();
}
double s=0;
   for(int i=0;i<n;i++){
     s=s+A[i];
   }
   int c =0;
   double p=s/(4*m);
   for(int i=0;i<n;i++){
     if(A[i]>=p){
   c=c+1;
 }
}
 if(c>=m){
 System.out.println("Yes");
}else{
  System.out.println("No");
}
} Scanner kbd = new Scanner(System.in); kbd new Scanner(System.in) int n =kbd.nextInt(); n kbd.nextInt() kbd.nextInt kbd double m =kbd.nextInt(); m kbd.nextInt() kbd.nextInt kbd int[] A= new int[n]; A new int[n] n for(int i=0;i<n;i++){
     A[i]=kbd.nextInt();
} int i=0; int i=0; i 0 i<n i n i++ i++ i {
     A[i]=kbd.nextInt();
} {
     A[i]=kbd.nextInt();
} A[i]=kbd.nextInt() A[i] A i kbd.nextInt() kbd.nextInt kbd double s=0; s 0 for(int i=0;i<n;i++){
     s=s+A[i];
   } int i=0; int i=0; i 0 i<n i n i++ i++ i {
     s=s+A[i];
   } {
     s=s+A[i];
   } s=s+A[i] s s+A[i] s A[i] A i int c =0; c 0 double p=s/(4*m); p s/(4*m) s (4*m) 4 m for(int i=0;i<n;i++){
     if(A[i]>=p){
   c=c+1;
 }
} int i=0; int i=0; i 0 i<n i n i++ i++ i {
     if(A[i]>=p){
   c=c+1;
 }
} {
     if(A[i]>=p){
   c=c+1;
 }
} if(A[i]>=p){
   c=c+1;
 } A[i]>=p A[i] A i p {
   c=c+1;
 } c=c+1 c c+1 c 1 if(c>=m){
 System.out.println("Yes");
}else{
  System.out.println("No");
} c>=m c 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) {
   Scanner kbd = new Scanner(System.in);
   int n =kbd.nextInt();
  double m =kbd.nextInt();
   int[] A= new int[n];
   for(int i=0;i<n;i++){
     A[i]=kbd.nextInt();
}
double s=0;
   for(int i=0;i<n;i++){
     s=s+A[i];
   }
   int c =0;
   double p=s/(4*m);
   for(int i=0;i<n;i++){
     if(A[i]>=p){
   c=c+1;
 }
}
 if(c>=m){
 System.out.println("Yes");
}else{
  System.out.println("No");
}
}
} public class Main{
 public static void main(String[] args) {
   Scanner kbd = new Scanner(System.in);
   int n =kbd.nextInt();
  double m =kbd.nextInt();
   int[] A= new int[n];
   for(int i=0;i<n;i++){
     A[i]=kbd.nextInt();
}
double s=0;
   for(int i=0;i<n;i++){
     s=s+A[i];
   }
   int c =0;
   double p=s/(4*m);
   for(int i=0;i<n;i++){
     if(A[i]>=p){
   c=c+1;
 }
}
 if(c>=m){
 System.out.println("Yes");
}else{
  System.out.println("No");
}
}
} Main
import java.util.Scanner;
public class Main{
 public static void main(String[] args) {
   Scanner kbd = new Scanner(System.in);
   int n =kbd.nextInt();
  double m =kbd.nextInt();
   int[] A= new int[n];
   for(int i=0;i<n;i++){
     A[i]=kbd.nextInt();
}
double s=0;
   for(int i=0;i<n;i++){
     s=s+A[i];
   }
   int c =0;
   double p=s/(4*m);
   for(int i=0;i<n;i++){
     if(A[i]>=p){
   c=c+1;
 }
}
 if(c>=m){
 System.out.println("Yes");
}else{
  System.out.println("No");
}
}
}