import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        final Scanner input = new Scanner(System.in);

        int n = input.nextInt();
        int m = input.nextInt();
        double[] votes = new double[n];
        double total=0;
        for (int i = 0; i < n; i++) {
            double vote = input.nextDouble();
            total+=vote;
            votes[i] =vote;
        }
        int counter =0;
        for (int i = 0; i < n; i++) {
                double ratio = total/(4*m);

            if( votes[i] >=ratio ){
                counter++;
            }
        }
        if(counter >=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) {
        final Scanner input = new Scanner(System.in);

        int n = input.nextInt();
        int m = input.nextInt();
        double[] votes = new double[n];
        double total=0;
        for (int i = 0; i < n; i++) {
            double vote = input.nextDouble();
            total+=vote;
            votes[i] =vote;
        }
        int counter =0;
        for (int i = 0; i < n; i++) {
                double ratio = total/(4*m);

            if( votes[i] >=ratio ){
                counter++;
            }
        }
        if(counter >=m){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }
} Main public static void main(String[] args) {
        final Scanner input = new Scanner(System.in);

        int n = input.nextInt();
        int m = input.nextInt();
        double[] votes = new double[n];
        double total=0;
        for (int i = 0; i < n; i++) {
            double vote = input.nextDouble();
            total+=vote;
            votes[i] =vote;
        }
        int counter =0;
        for (int i = 0; i < n; i++) {
                double ratio = total/(4*m);

            if( votes[i] >=ratio ){
                counter++;
            }
        }
        if(counter >=m){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    } main {
        final Scanner input = new Scanner(System.in);

        int n = input.nextInt();
        int m = input.nextInt();
        double[] votes = new double[n];
        double total=0;
        for (int i = 0; i < n; i++) {
            double vote = input.nextDouble();
            total+=vote;
            votes[i] =vote;
        }
        int counter =0;
        for (int i = 0; i < n; i++) {
                double ratio = total/(4*m);

            if( votes[i] >=ratio ){
                counter++;
            }
        }
        if(counter >=m){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    } final Scanner input = new Scanner(System.in); input new Scanner(System.in) int n = input.nextInt(); n input.nextInt() input.nextInt input int m = input.nextInt(); m input.nextInt() input.nextInt input double[] votes = new double[n]; votes new double[n] n double total=0; total 0 for (int i = 0; i < n; i++) {
            double vote = input.nextDouble();
            total+=vote;
            votes[i] =vote;
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            double vote = input.nextDouble();
            total+=vote;
            votes[i] =vote;
        } {
            double vote = input.nextDouble();
            total+=vote;
            votes[i] =vote;
        } double vote = input.nextDouble(); vote input.nextDouble() input.nextDouble input total+=vote total vote votes[i] =vote votes[i] votes i vote int counter =0; counter 0 for (int i = 0; i < n; i++) {
                double ratio = total/(4*m);

            if( votes[i] >=ratio ){
                counter++;
            }
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
                double ratio = total/(4*m);

            if( votes[i] >=ratio ){
                counter++;
            }
        } {
                double ratio = total/(4*m);

            if( votes[i] >=ratio ){
                counter++;
            }
        } double ratio = total/(4*m); ratio total/(4*m) total (4*m) 4 m if( votes[i] >=ratio ){
                counter++;
            } votes[i] >=ratio votes[i] votes i ratio {
                counter++;
            } counter++ counter if(counter >=m){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        } counter >=m counter 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) {
        final Scanner input = new Scanner(System.in);

        int n = input.nextInt();
        int m = input.nextInt();
        double[] votes = new double[n];
        double total=0;
        for (int i = 0; i < n; i++) {
            double vote = input.nextDouble();
            total+=vote;
            votes[i] =vote;
        }
        int counter =0;
        for (int i = 0; i < n; i++) {
                double ratio = total/(4*m);

            if( votes[i] >=ratio ){
                counter++;
            }
        }
        if(counter >=m){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }
} public class Main {
    public static void main(String[] args) {
        final Scanner input = new Scanner(System.in);

        int n = input.nextInt();
        int m = input.nextInt();
        double[] votes = new double[n];
        double total=0;
        for (int i = 0; i < n; i++) {
            double vote = input.nextDouble();
            total+=vote;
            votes[i] =vote;
        }
        int counter =0;
        for (int i = 0; i < n; i++) {
                double ratio = total/(4*m);

            if( votes[i] >=ratio ){
                counter++;
            }
        }
        if(counter >=m){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }
} Main
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        final Scanner input = new Scanner(System.in);

        int n = input.nextInt();
        int m = input.nextInt();
        double[] votes = new double[n];
        double total=0;
        for (int i = 0; i < n; i++) {
            double vote = input.nextDouble();
            total+=vote;
            votes[i] =vote;
        }
        int counter =0;
        for (int i = 0; i < n; i++) {
                double ratio = total/(4*m);

            if( votes[i] >=ratio ){
                counter++;
            }
        }
        if(counter >=m){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }
}
