/*package whatever //do not write package name here */

import java.io.*;

import java.util.*;
public class Main{
	public static void main (String[] args) {
	Scanner s=new Scanner(System.in);
	int n=s.nextInt();
	int m=s.nextInt();
	int a[]=new int[n];
	int sum=0;
	for(int i=0;i<n;i++)
	{a[i]=s.nextInt();
	sum+=a[i];}
	Arrays.sort(a);
	if(a[n-m]>=(int)Math.ceil(sum/(4.0*m)))
	System.out.println("Yes");
	else
	System.out.println("No");
	}
} import java.io.*; io.* java import java.util.*; util.* java public class Main{
	public static void main (String[] args) {
	Scanner s=new Scanner(System.in);
	int n=s.nextInt();
	int m=s.nextInt();
	int a[]=new int[n];
	int sum=0;
	for(int i=0;i<n;i++)
	{a[i]=s.nextInt();
	sum+=a[i];}
	Arrays.sort(a);
	if(a[n-m]>=(int)Math.ceil(sum/(4.0*m)))
	System.out.println("Yes");
	else
	System.out.println("No");
	}
} Main public static void main (String[] args) {
	Scanner s=new Scanner(System.in);
	int n=s.nextInt();
	int m=s.nextInt();
	int a[]=new int[n];
	int sum=0;
	for(int i=0;i<n;i++)
	{a[i]=s.nextInt();
	sum+=a[i];}
	Arrays.sort(a);
	if(a[n-m]>=(int)Math.ceil(sum/(4.0*m)))
	System.out.println("Yes");
	else
	System.out.println("No");
	} main {
	Scanner s=new Scanner(System.in);
	int n=s.nextInt();
	int m=s.nextInt();
	int a[]=new int[n];
	int sum=0;
	for(int i=0;i<n;i++)
	{a[i]=s.nextInt();
	sum+=a[i];}
	Arrays.sort(a);
	if(a[n-m]>=(int)Math.ceil(sum/(4.0*m)))
	System.out.println("Yes");
	else
	System.out.println("No");
	} Scanner s=new Scanner(System.in); s new Scanner(System.in) int n=s.nextInt(); n s.nextInt() s.nextInt s int m=s.nextInt(); m s.nextInt() s.nextInt s int a[]=new int[n]; a new int[n] n int sum=0; sum 0 for(int i=0;i<n;i++)
	{a[i]=s.nextInt();
	sum+=a[i];} int i=0; int i=0; i 0 i<n i n i++ i++ i {a[i]=s.nextInt();
	sum+=a[i];} {a[i]=s.nextInt();
	sum+=a[i];} a[i]=s.nextInt() a[i] a i s.nextInt() s.nextInt s sum+=a[i] sum a[i] a i Arrays.sort(a) Arrays.sort Arrays a if(a[n-m]>=(int)Math.ceil(sum/(4.0*m)))
	System.out.println("Yes");
	else
	System.out.println("No"); a[n-m]>=(int)Math.ceil(sum/(4.0*m)) a[n-m] a n-m n m (int)Math.ceil(sum/(4.0*m)) Math.ceil Math sum/(4.0*m) sum (4.0*m) 4.0 m System.out.println("Yes") System.out.println System.out System System.out "Yes" 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 s=new Scanner(System.in);
	int n=s.nextInt();
	int m=s.nextInt();
	int a[]=new int[n];
	int sum=0;
	for(int i=0;i<n;i++)
	{a[i]=s.nextInt();
	sum+=a[i];}
	Arrays.sort(a);
	if(a[n-m]>=(int)Math.ceil(sum/(4.0*m)))
	System.out.println("Yes");
	else
	System.out.println("No");
	}
} public class Main{
	public static void main (String[] args) {
	Scanner s=new Scanner(System.in);
	int n=s.nextInt();
	int m=s.nextInt();
	int a[]=new int[n];
	int sum=0;
	for(int i=0;i<n;i++)
	{a[i]=s.nextInt();
	sum+=a[i];}
	Arrays.sort(a);
	if(a[n-m]>=(int)Math.ceil(sum/(4.0*m)))
	System.out.println("Yes");
	else
	System.out.println("No");
	}
} Main
/*package whatever //do not write package name here */

import java.io.*;

import java.util.*;
public class Main{
	public static void main (String[] args) {
	Scanner s=new Scanner(System.in);
	int n=s.nextInt();
	int m=s.nextInt();
	int a[]=new int[n];
	int sum=0;
	for(int i=0;i<n;i++)
	{a[i]=s.nextInt();
	sum+=a[i];}
	Arrays.sort(a);
	if(a[n-m]>=(int)Math.ceil(sum/(4.0*m)))
	System.out.println("Yes");
	else
	System.out.println("No");
	}
}