import java.io.*;

public class Main
{
	public static void main(String[] args)throws IOException
	{
		int N,f=0,sum=0;
		double M;
		BufferedReader br=
		new BufferedReader(new InputStreamReader(System.in));
		
		String str1=br.readLine();
		String str2=br.readLine();
		String[] strs1=str1.split(" ",2);
		N=Integer.parseInt(strs1[0]);
		M = Integer.parseInt(strs1[1]);
		String[] strs2=str2.split(" ",N);
		int[] nums= new int[N];
		for(int i=0;i<N;i++){
			nums[i]=Integer.parseInt(strs2[i]);
			sum+=nums[i];
		}
		for(int i=0;i<N;i++){
			if(nums[i]>=(sum/(4*M))){
				f++;
			}
		}
		if(f>=M){
			System.out.println("Yes");
		}else{
			System.out.println("No");
		}
	}
} import java.io.*; io.* java public class Main
{
	public static void main(String[] args)throws IOException
	{
		int N,f=0,sum=0;
		double M;
		BufferedReader br=
		new BufferedReader(new InputStreamReader(System.in));
		
		String str1=br.readLine();
		String str2=br.readLine();
		String[] strs1=str1.split(" ",2);
		N=Integer.parseInt(strs1[0]);
		M = Integer.parseInt(strs1[1]);
		String[] strs2=str2.split(" ",N);
		int[] nums= new int[N];
		for(int i=0;i<N;i++){
			nums[i]=Integer.parseInt(strs2[i]);
			sum+=nums[i];
		}
		for(int i=0;i<N;i++){
			if(nums[i]>=(sum/(4*M))){
				f++;
			}
		}
		if(f>=M){
			System.out.println("Yes");
		}else{
			System.out.println("No");
		}
	}
} Main public static void main(String[] args)throws IOException
	{
		int N,f=0,sum=0;
		double M;
		BufferedReader br=
		new BufferedReader(new InputStreamReader(System.in));
		
		String str1=br.readLine();
		String str2=br.readLine();
		String[] strs1=str1.split(" ",2);
		N=Integer.parseInt(strs1[0]);
		M = Integer.parseInt(strs1[1]);
		String[] strs2=str2.split(" ",N);
		int[] nums= new int[N];
		for(int i=0;i<N;i++){
			nums[i]=Integer.parseInt(strs2[i]);
			sum+=nums[i];
		}
		for(int i=0;i<N;i++){
			if(nums[i]>=(sum/(4*M))){
				f++;
			}
		}
		if(f>=M){
			System.out.println("Yes");
		}else{
			System.out.println("No");
		}
	} main {
		int N,f=0,sum=0;
		double M;
		BufferedReader br=
		new BufferedReader(new InputStreamReader(System.in));
		
		String str1=br.readLine();
		String str2=br.readLine();
		String[] strs1=str1.split(" ",2);
		N=Integer.parseInt(strs1[0]);
		M = Integer.parseInt(strs1[1]);
		String[] strs2=str2.split(" ",N);
		int[] nums= new int[N];
		for(int i=0;i<N;i++){
			nums[i]=Integer.parseInt(strs2[i]);
			sum+=nums[i];
		}
		for(int i=0;i<N;i++){
			if(nums[i]>=(sum/(4*M))){
				f++;
			}
		}
		if(f>=M){
			System.out.println("Yes");
		}else{
			System.out.println("No");
		}
	} int N N f=0 f 0 sum=0; sum 0 double M; M BufferedReader br=
		new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) String str1=br.readLine(); str1 br.readLine() br.readLine br String str2=br.readLine(); str2 br.readLine() br.readLine br String[] strs1=str1.split(" ",2); strs1 str1.split(" ",2) str1.split str1 " " 2 N=Integer.parseInt(strs1[0]) N Integer.parseInt(strs1[0]) Integer.parseInt Integer strs1[0] strs1 0 M = Integer.parseInt(strs1[1]) M Integer.parseInt(strs1[1]) Integer.parseInt Integer strs1[1] strs1 1 String[] strs2=str2.split(" ",N); strs2 str2.split(" ",N) str2.split str2 " " N int[] nums= new int[N]; nums new int[N] N for(int i=0;i<N;i++){
			nums[i]=Integer.parseInt(strs2[i]);
			sum+=nums[i];
		} int i=0; int i=0; i 0 i<N i N i++ i++ i {
			nums[i]=Integer.parseInt(strs2[i]);
			sum+=nums[i];
		} {
			nums[i]=Integer.parseInt(strs2[i]);
			sum+=nums[i];
		} nums[i]=Integer.parseInt(strs2[i]) nums[i] nums i Integer.parseInt(strs2[i]) Integer.parseInt Integer strs2[i] strs2 i sum+=nums[i] sum nums[i] nums i for(int i=0;i<N;i++){
			if(nums[i]>=(sum/(4*M))){
				f++;
			}
		} int i=0; int i=0; i 0 i<N i N i++ i++ i {
			if(nums[i]>=(sum/(4*M))){
				f++;
			}
		} {
			if(nums[i]>=(sum/(4*M))){
				f++;
			}
		} if(nums[i]>=(sum/(4*M))){
				f++;
			} nums[i]>=(sum/(4*M)) nums[i] nums i (sum/(4*M)) sum (4*M) 4 M {
				f++;
			} f++ f if(f>=M){
			System.out.println("Yes");
		}else{
			System.out.println("No");
		} f>=M f 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 IOException
	{
		int N,f=0,sum=0;
		double M;
		BufferedReader br=
		new BufferedReader(new InputStreamReader(System.in));
		
		String str1=br.readLine();
		String str2=br.readLine();
		String[] strs1=str1.split(" ",2);
		N=Integer.parseInt(strs1[0]);
		M = Integer.parseInt(strs1[1]);
		String[] strs2=str2.split(" ",N);
		int[] nums= new int[N];
		for(int i=0;i<N;i++){
			nums[i]=Integer.parseInt(strs2[i]);
			sum+=nums[i];
		}
		for(int i=0;i<N;i++){
			if(nums[i]>=(sum/(4*M))){
				f++;
			}
		}
		if(f>=M){
			System.out.println("Yes");
		}else{
			System.out.println("No");
		}
	}
} public class Main
{
	public static void main(String[] args)throws IOException
	{
		int N,f=0,sum=0;
		double M;
		BufferedReader br=
		new BufferedReader(new InputStreamReader(System.in));
		
		String str1=br.readLine();
		String str2=br.readLine();
		String[] strs1=str1.split(" ",2);
		N=Integer.parseInt(strs1[0]);
		M = Integer.parseInt(strs1[1]);
		String[] strs2=str2.split(" ",N);
		int[] nums= new int[N];
		for(int i=0;i<N;i++){
			nums[i]=Integer.parseInt(strs2[i]);
			sum+=nums[i];
		}
		for(int i=0;i<N;i++){
			if(nums[i]>=(sum/(4*M))){
				f++;
			}
		}
		if(f>=M){
			System.out.println("Yes");
		}else{
			System.out.println("No");
		}
	}
} Main
import java.io.*;

public class Main
{
	public static void main(String[] args)throws IOException
	{
		int N,f=0,sum=0;
		double M;
		BufferedReader br=
		new BufferedReader(new InputStreamReader(System.in));
		
		String str1=br.readLine();
		String str2=br.readLine();
		String[] strs1=str1.split(" ",2);
		N=Integer.parseInt(strs1[0]);
		M = Integer.parseInt(strs1[1]);
		String[] strs2=str2.split(" ",N);
		int[] nums= new int[N];
		for(int i=0;i<N;i++){
			nums[i]=Integer.parseInt(strs2[i]);
			sum+=nums[i];
		}
		for(int i=0;i<N;i++){
			if(nums[i]>=(sum/(4*M))){
				f++;
			}
		}
		if(f>=M){
			System.out.println("Yes");
		}else{
			System.out.println("No");
		}
	}
}