
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.StringTokenizer;
import java.io.BufferedReader;
import java.io.InputStreamReader;


class Main{
    public static void main(String[] args) {
        InputReader in = new InputReader(System.in);
        PrintWriter out = new PrintWriter(System.out);
        float Sum = 0 ;
        int N = in.nextInt();
        int M = in.nextInt();
        ArrayList<Integer> A = new ArrayList<Integer>();
        for (int i = 0; i < N; i++) {
            A.add(in.nextInt());
            Sum += A.get(i);
        }
        float criteria = (Sum/(4*M)) ;
        int count = 0;
        for (int i = 0; i < N; i++) {
            if(A.get(i) >= criteria )
                count++;

        }

        if(count >= M)
            System.out.println("Yes");
        else
            System.out.println("No");






    }

    static class InputReader {
        public BufferedReader reader;
        public StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }

    }
} import java.io.IOException; IOException java.io import java.io.InputStream; InputStream java.io import java.io.PrintWriter; PrintWriter java.io import java.util.ArrayList; ArrayList java.util import java.util.Collection; Collection java.util import java.util.Collections; Collections java.util import java.util.StringTokenizer; StringTokenizer java.util import java.io.BufferedReader; BufferedReader java.io import java.io.InputStreamReader; InputStreamReader java.io class Main{
    public static void main(String[] args) {
        InputReader in = new InputReader(System.in);
        PrintWriter out = new PrintWriter(System.out);
        float Sum = 0 ;
        int N = in.nextInt();
        int M = in.nextInt();
        ArrayList<Integer> A = new ArrayList<Integer>();
        for (int i = 0; i < N; i++) {
            A.add(in.nextInt());
            Sum += A.get(i);
        }
        float criteria = (Sum/(4*M)) ;
        int count = 0;
        for (int i = 0; i < N; i++) {
            if(A.get(i) >= criteria )
                count++;

        }

        if(count >= M)
            System.out.println("Yes");
        else
            System.out.println("No");






    }

    static class InputReader {
        public BufferedReader reader;
        public StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }

    }
} Main public static void main(String[] args) {
        InputReader in = new InputReader(System.in);
        PrintWriter out = new PrintWriter(System.out);
        float Sum = 0 ;
        int N = in.nextInt();
        int M = in.nextInt();
        ArrayList<Integer> A = new ArrayList<Integer>();
        for (int i = 0; i < N; i++) {
            A.add(in.nextInt());
            Sum += A.get(i);
        }
        float criteria = (Sum/(4*M)) ;
        int count = 0;
        for (int i = 0; i < N; i++) {
            if(A.get(i) >= criteria )
                count++;

        }

        if(count >= M)
            System.out.println("Yes");
        else
            System.out.println("No");






    } main {
        InputReader in = new InputReader(System.in);
        PrintWriter out = new PrintWriter(System.out);
        float Sum = 0 ;
        int N = in.nextInt();
        int M = in.nextInt();
        ArrayList<Integer> A = new ArrayList<Integer>();
        for (int i = 0; i < N; i++) {
            A.add(in.nextInt());
            Sum += A.get(i);
        }
        float criteria = (Sum/(4*M)) ;
        int count = 0;
        for (int i = 0; i < N; i++) {
            if(A.get(i) >= criteria )
                count++;

        }

        if(count >= M)
            System.out.println("Yes");
        else
            System.out.println("No");






    } InputReader in = new InputReader(System.in); in new InputReader(System.in) PrintWriter out = new PrintWriter(System.out); out new PrintWriter(System.out) float Sum = 0 ; Sum 0 int N = in.nextInt(); N in.nextInt() in.nextInt in int M = in.nextInt(); M in.nextInt() in.nextInt in ArrayList<Integer> A = new ArrayList<Integer>(); A new ArrayList<Integer>() for (int i = 0; i < N; i++) {
            A.add(in.nextInt());
            Sum += A.get(i);
        } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
            A.add(in.nextInt());
            Sum += A.get(i);
        } {
            A.add(in.nextInt());
            Sum += A.get(i);
        } A.add(in.nextInt()) A.add A in.nextInt() in.nextInt in Sum += A.get(i) Sum A.get(i) A.get A i float criteria = (Sum/(4*M)) ; criteria (Sum/(4*M)) Sum (4*M) 4 M int count = 0; count 0 for (int i = 0; i < N; i++) {
            if(A.get(i) >= criteria )
                count++;

        } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
            if(A.get(i) >= criteria )
                count++;

        } {
            if(A.get(i) >= criteria )
                count++;

        } if(A.get(i) >= criteria )
                count++; A.get(i) >= criteria A.get(i) A.get A i criteria count++ count if(count >= M)
            System.out.println("Yes");
        else
            System.out.println("No"); count >= M count 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 static class InputReader {
        public BufferedReader reader;
        public StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }

    } InputReader public BufferedReader reader; reader public StringTokenizer tokenizer; tokenizer public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        } InputReader {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        } reader = new BufferedReader(new InputStreamReader(stream), 32768) reader new BufferedReader(new InputStreamReader(stream), 32768) tokenizer = null tokenizer null InputStream stream stream public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        } next {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        } while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            } tokenizer == null || !tokenizer.hasMoreTokens() tokenizer == null tokenizer null !tokenizer.hasMoreTokens() tokenizer.hasMoreTokens() tokenizer.hasMoreTokens tokenizer {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            } try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                } catch (IOException e) {
                    throw new RuntimeException(e);
                } IOException e {
                    throw new RuntimeException(e);
                } throw new RuntimeException(e); new RuntimeException(e) {
                    tokenizer = new StringTokenizer(reader.readLine());
                } tokenizer = new StringTokenizer(reader.readLine()) tokenizer new StringTokenizer(reader.readLine()) return tokenizer.nextToken(); tokenizer.nextToken() tokenizer.nextToken tokenizer public int nextInt() {
            return Integer.parseInt(next());
        } nextInt {
            return Integer.parseInt(next());
        } return Integer.parseInt(next()); Integer.parseInt(next()) Integer.parseInt Integer next() next

import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.StringTokenizer;
import java.io.BufferedReader;
import java.io.InputStreamReader;


class Main{
    public static void main(String[] args) {
        InputReader in = new InputReader(System.in);
        PrintWriter out = new PrintWriter(System.out);
        float Sum = 0 ;
        int N = in.nextInt();
        int M = in.nextInt();
        ArrayList<Integer> A = new ArrayList<Integer>();
        for (int i = 0; i < N; i++) {
            A.add(in.nextInt());
            Sum += A.get(i);
        }
        float criteria = (Sum/(4*M)) ;
        int count = 0;
        for (int i = 0; i < N; i++) {
            if(A.get(i) >= criteria )
                count++;

        }

        if(count >= M)
            System.out.println("Yes");
        else
            System.out.println("No");






    }

    static class InputReader {
        public BufferedReader reader;
        public StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }

    }
}