import java.util.Scanner;
import java.util.Arrays;

public class Main {
    public static void main(String[] args){
        Scanner stdIn = new Scanner(System.in);
        int N = stdIn.nextInt();
        int M = stdIn.nextInt();
        int sum_M =0;

        int[] A = new int[N];
        int sum = 0;
        for (int i=0; i<A.length; i++){
            A[i] = stdIn.nextInt();
            sum += A[i];
        }

        Arrays.sort(A);
        /*for(int i=N-1; i>0; i--){
            System.out.print(A[i]+" ");
        }*/

        double AAA = A[N-M];
        double BBB = (double)sum/((double)M*4.0);
        //System.out.println("\n"+AAA+"\n"+BBB+"\n"+(AAA-BBB));
        if(AAA < BBB ){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        }




    }
} import java.util.Scanner; Scanner java.util import java.util.Arrays; Arrays java.util public class Main {
    public static void main(String[] args){
        Scanner stdIn = new Scanner(System.in);
        int N = stdIn.nextInt();
        int M = stdIn.nextInt();
        int sum_M =0;

        int[] A = new int[N];
        int sum = 0;
        for (int i=0; i<A.length; i++){
            A[i] = stdIn.nextInt();
            sum += A[i];
        }

        Arrays.sort(A);
        /*for(int i=N-1; i>0; i--){
            System.out.print(A[i]+" ");
        }*/

        double AAA = A[N-M];
        double BBB = (double)sum/((double)M*4.0);
        //System.out.println("\n"+AAA+"\n"+BBB+"\n"+(AAA-BBB));
        if(AAA < BBB ){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        }




    }
} Main public static void main(String[] args){
        Scanner stdIn = new Scanner(System.in);
        int N = stdIn.nextInt();
        int M = stdIn.nextInt();
        int sum_M =0;

        int[] A = new int[N];
        int sum = 0;
        for (int i=0; i<A.length; i++){
            A[i] = stdIn.nextInt();
            sum += A[i];
        }

        Arrays.sort(A);
        /*for(int i=N-1; i>0; i--){
            System.out.print(A[i]+" ");
        }*/

        double AAA = A[N-M];
        double BBB = (double)sum/((double)M*4.0);
        //System.out.println("\n"+AAA+"\n"+BBB+"\n"+(AAA-BBB));
        if(AAA < BBB ){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        }




    } main {
        Scanner stdIn = new Scanner(System.in);
        int N = stdIn.nextInt();
        int M = stdIn.nextInt();
        int sum_M =0;

        int[] A = new int[N];
        int sum = 0;
        for (int i=0; i<A.length; i++){
            A[i] = stdIn.nextInt();
            sum += A[i];
        }

        Arrays.sort(A);
        /*for(int i=N-1; i>0; i--){
            System.out.print(A[i]+" ");
        }*/

        double AAA = A[N-M];
        double BBB = (double)sum/((double)M*4.0);
        //System.out.println("\n"+AAA+"\n"+BBB+"\n"+(AAA-BBB));
        if(AAA < BBB ){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        }




    } Scanner stdIn = new Scanner(System.in); stdIn new Scanner(System.in) int N = stdIn.nextInt(); N stdIn.nextInt() stdIn.nextInt stdIn int M = stdIn.nextInt(); M stdIn.nextInt() stdIn.nextInt stdIn int sum_M =0; sum_M 0 int[] A = new int[N]; A new int[N] N int sum = 0; sum 0 for (int i=0; i<A.length; i++){
            A[i] = stdIn.nextInt();
            sum += A[i];
        } int i=0; int i=0; i 0 i<A.length i A.length A A.length i++ i++ i {
            A[i] = stdIn.nextInt();
            sum += A[i];
        } {
            A[i] = stdIn.nextInt();
            sum += A[i];
        } A[i] = stdIn.nextInt() A[i] A i stdIn.nextInt() stdIn.nextInt stdIn sum += A[i] sum A[i] A i Arrays.sort(A) Arrays.sort Arrays A double AAA = A[N-M]; AAA A[N-M] A N-M N M double BBB = (double)sum/((double)M*4.0); BBB (double)sum/((double)M*4.0) (double)sum ((double)M*4.0) (double)M 4.0 if(AAA < BBB ){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        } AAA < BBB AAA BBB {
            System.out.println("No");
        } System.out.println("No") System.out.println System.out System System.out "No" {
            System.out.println("Yes");
        } System.out.println("Yes") System.out.println System.out System System.out "Yes" String[] args args public class Main {
    public static void main(String[] args){
        Scanner stdIn = new Scanner(System.in);
        int N = stdIn.nextInt();
        int M = stdIn.nextInt();
        int sum_M =0;

        int[] A = new int[N];
        int sum = 0;
        for (int i=0; i<A.length; i++){
            A[i] = stdIn.nextInt();
            sum += A[i];
        }

        Arrays.sort(A);
        /*for(int i=N-1; i>0; i--){
            System.out.print(A[i]+" ");
        }*/

        double AAA = A[N-M];
        double BBB = (double)sum/((double)M*4.0);
        //System.out.println("\n"+AAA+"\n"+BBB+"\n"+(AAA-BBB));
        if(AAA < BBB ){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        }




    }
} public class Main {
    public static void main(String[] args){
        Scanner stdIn = new Scanner(System.in);
        int N = stdIn.nextInt();
        int M = stdIn.nextInt();
        int sum_M =0;

        int[] A = new int[N];
        int sum = 0;
        for (int i=0; i<A.length; i++){
            A[i] = stdIn.nextInt();
            sum += A[i];
        }

        Arrays.sort(A);
        /*for(int i=N-1; i>0; i--){
            System.out.print(A[i]+" ");
        }*/

        double AAA = A[N-M];
        double BBB = (double)sum/((double)M*4.0);
        //System.out.println("\n"+AAA+"\n"+BBB+"\n"+(AAA-BBB));
        if(AAA < BBB ){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        }




    }
} Main
import java.util.Scanner;
import java.util.Arrays;

public class Main {
    public static void main(String[] args){
        Scanner stdIn = new Scanner(System.in);
        int N = stdIn.nextInt();
        int M = stdIn.nextInt();
        int sum_M =0;

        int[] A = new int[N];
        int sum = 0;
        for (int i=0; i<A.length; i++){
            A[i] = stdIn.nextInt();
            sum += A[i];
        }

        Arrays.sort(A);
        /*for(int i=N-1; i>0; i--){
            System.out.print(A[i]+" ");
        }*/

        double AAA = A[N-M];
        double BBB = (double)sum/((double)M*4.0);
        //System.out.println("\n"+AAA+"\n"+BBB+"\n"+(AAA-BBB));
        if(AAA < BBB ){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        }




    }
}