import java.util.ArrayList;
import java.util.Collections;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        int m = scanner.nextInt();

        ArrayList<Integer> tokuhyou = new ArrayList<>();
        int sum = 0;

        for (int i = 0; i < n; i++) {
            int a = scanner.nextInt();
            tokuhyou.add(a);
            sum = sum + a;
        }
        Collections.sort(tokuhyou);
        Collections.reverse(tokuhyou);
        String answer = "Yes";

        for (int j = 0; j < m; j++){
            int ninnki = tokuhyou.get(j);
            if (((double)sum/(4.0*(double) m))> ninnki){
                answer = "No";
                break;
            }
        }
        System.out.println(answer);


    }
} import java.util.ArrayList; ArrayList java.util import java.util.Collections; Collections java.util import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        int m = scanner.nextInt();

        ArrayList<Integer> tokuhyou = new ArrayList<>();
        int sum = 0;

        for (int i = 0; i < n; i++) {
            int a = scanner.nextInt();
            tokuhyou.add(a);
            sum = sum + a;
        }
        Collections.sort(tokuhyou);
        Collections.reverse(tokuhyou);
        String answer = "Yes";

        for (int j = 0; j < m; j++){
            int ninnki = tokuhyou.get(j);
            if (((double)sum/(4.0*(double) m))> ninnki){
                answer = "No";
                break;
            }
        }
        System.out.println(answer);


    }
} Main public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        int m = scanner.nextInt();

        ArrayList<Integer> tokuhyou = new ArrayList<>();
        int sum = 0;

        for (int i = 0; i < n; i++) {
            int a = scanner.nextInt();
            tokuhyou.add(a);
            sum = sum + a;
        }
        Collections.sort(tokuhyou);
        Collections.reverse(tokuhyou);
        String answer = "Yes";

        for (int j = 0; j < m; j++){
            int ninnki = tokuhyou.get(j);
            if (((double)sum/(4.0*(double) m))> ninnki){
                answer = "No";
                break;
            }
        }
        System.out.println(answer);


    } main {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        int m = scanner.nextInt();

        ArrayList<Integer> tokuhyou = new ArrayList<>();
        int sum = 0;

        for (int i = 0; i < n; i++) {
            int a = scanner.nextInt();
            tokuhyou.add(a);
            sum = sum + a;
        }
        Collections.sort(tokuhyou);
        Collections.reverse(tokuhyou);
        String answer = "Yes";

        for (int j = 0; j < m; j++){
            int ninnki = tokuhyou.get(j);
            if (((double)sum/(4.0*(double) m))> ninnki){
                answer = "No";
                break;
            }
        }
        System.out.println(answer);


    } Scanner scanner = new Scanner(System.in); scanner new Scanner(System.in) int n = scanner.nextInt(); n scanner.nextInt() scanner.nextInt scanner int m = scanner.nextInt(); m scanner.nextInt() scanner.nextInt scanner ArrayList<Integer> tokuhyou = new ArrayList<>(); tokuhyou new ArrayList<>() int sum = 0; sum 0 for (int i = 0; i < n; i++) {
            int a = scanner.nextInt();
            tokuhyou.add(a);
            sum = sum + a;
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            int a = scanner.nextInt();
            tokuhyou.add(a);
            sum = sum + a;
        } {
            int a = scanner.nextInt();
            tokuhyou.add(a);
            sum = sum + a;
        } int a = scanner.nextInt(); a scanner.nextInt() scanner.nextInt scanner tokuhyou.add(a) tokuhyou.add tokuhyou a sum = sum + a sum sum + a sum a Collections.sort(tokuhyou) Collections.sort Collections tokuhyou Collections.reverse(tokuhyou) Collections.reverse Collections tokuhyou String answer = "Yes"; answer "Yes" for (int j = 0; j < m; j++){
            int ninnki = tokuhyou.get(j);
            if (((double)sum/(4.0*(double) m))> ninnki){
                answer = "No";
                break;
            }
        } int j = 0; int j = 0; j 0 j < m j m j++ j++ j {
            int ninnki = tokuhyou.get(j);
            if (((double)sum/(4.0*(double) m))> ninnki){
                answer = "No";
                break;
            }
        } {
            int ninnki = tokuhyou.get(j);
            if (((double)sum/(4.0*(double) m))> ninnki){
                answer = "No";
                break;
            }
        } int ninnki = tokuhyou.get(j); ninnki tokuhyou.get(j) tokuhyou.get tokuhyou j if (((double)sum/(4.0*(double) m))> ninnki){
                answer = "No";
                break;
            } ((double)sum/(4.0*(double) m))> ninnki ((double)sum/(4.0*(double) m)) (double)sum (4.0*(double) m) 4.0 (double) m ninnki {
                answer = "No";
                break;
            } answer = "No" answer "No" break; System.out.println(answer) System.out.println System.out System System.out answer String[] args args public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        int m = scanner.nextInt();

        ArrayList<Integer> tokuhyou = new ArrayList<>();
        int sum = 0;

        for (int i = 0; i < n; i++) {
            int a = scanner.nextInt();
            tokuhyou.add(a);
            sum = sum + a;
        }
        Collections.sort(tokuhyou);
        Collections.reverse(tokuhyou);
        String answer = "Yes";

        for (int j = 0; j < m; j++){
            int ninnki = tokuhyou.get(j);
            if (((double)sum/(4.0*(double) m))> ninnki){
                answer = "No";
                break;
            }
        }
        System.out.println(answer);


    }
} public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        int m = scanner.nextInt();

        ArrayList<Integer> tokuhyou = new ArrayList<>();
        int sum = 0;

        for (int i = 0; i < n; i++) {
            int a = scanner.nextInt();
            tokuhyou.add(a);
            sum = sum + a;
        }
        Collections.sort(tokuhyou);
        Collections.reverse(tokuhyou);
        String answer = "Yes";

        for (int j = 0; j < m; j++){
            int ninnki = tokuhyou.get(j);
            if (((double)sum/(4.0*(double) m))> ninnki){
                answer = "No";
                break;
            }
        }
        System.out.println(answer);


    }
} Main
import java.util.ArrayList;
import java.util.Collections;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        int m = scanner.nextInt();

        ArrayList<Integer> tokuhyou = new ArrayList<>();
        int sum = 0;

        for (int i = 0; i < n; i++) {
            int a = scanner.nextInt();
            tokuhyou.add(a);
            sum = sum + a;
        }
        Collections.sort(tokuhyou);
        Collections.reverse(tokuhyou);
        String answer = "Yes";

        for (int j = 0; j < m; j++){
            int ninnki = tokuhyou.get(j);
            if (((double)sum/(4.0*(double) m))> ninnki){
                answer = "No";
                break;
            }
        }
        System.out.println(answer);


    }
}