import java.util.*;
import java.io.*;

public class Main {
    public static void main(String[] args) throws Exception {

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));
        
        String[] input1 = br.readLine().split(" ");
        int n = Integer.parseInt(input1[0]);
        double m = Double.parseDouble(input1[1]);
        
        String[] input2 = br.readLine().split(" ");
        Integer[] votes = new Integer[n];
        
        int voteCount = 0;
        
        for(int i = 0; i < n; i++){
            votes[i] = Integer.valueOf(input2[i]);
            voteCount += votes[i];
        }
        
        Arrays.sort(votes, Collections.reverseOrder());
        
        if(votes[(int)(m - 1)] >= voteCount * (1 / (4 * m))){
            out.println("Yes");
        }else{
            out.println("No");
        }
        
        out.close();
        
    }
} import java.util.*; util.* java import java.io.*; io.* java public class Main {
    public static void main(String[] args) throws Exception {

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));
        
        String[] input1 = br.readLine().split(" ");
        int n = Integer.parseInt(input1[0]);
        double m = Double.parseDouble(input1[1]);
        
        String[] input2 = br.readLine().split(" ");
        Integer[] votes = new Integer[n];
        
        int voteCount = 0;
        
        for(int i = 0; i < n; i++){
            votes[i] = Integer.valueOf(input2[i]);
            voteCount += votes[i];
        }
        
        Arrays.sort(votes, Collections.reverseOrder());
        
        if(votes[(int)(m - 1)] >= voteCount * (1 / (4 * m))){
            out.println("Yes");
        }else{
            out.println("No");
        }
        
        out.close();
        
    }
} Main public static void main(String[] args) throws Exception {

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));
        
        String[] input1 = br.readLine().split(" ");
        int n = Integer.parseInt(input1[0]);
        double m = Double.parseDouble(input1[1]);
        
        String[] input2 = br.readLine().split(" ");
        Integer[] votes = new Integer[n];
        
        int voteCount = 0;
        
        for(int i = 0; i < n; i++){
            votes[i] = Integer.valueOf(input2[i]);
            voteCount += votes[i];
        }
        
        Arrays.sort(votes, Collections.reverseOrder());
        
        if(votes[(int)(m - 1)] >= voteCount * (1 / (4 * m))){
            out.println("Yes");
        }else{
            out.println("No");
        }
        
        out.close();
        
    } main {

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));
        
        String[] input1 = br.readLine().split(" ");
        int n = Integer.parseInt(input1[0]);
        double m = Double.parseDouble(input1[1]);
        
        String[] input2 = br.readLine().split(" ");
        Integer[] votes = new Integer[n];
        
        int voteCount = 0;
        
        for(int i = 0; i < n; i++){
            votes[i] = Integer.valueOf(input2[i]);
            voteCount += votes[i];
        }
        
        Arrays.sort(votes, Collections.reverseOrder());
        
        if(votes[(int)(m - 1)] >= voteCount * (1 / (4 * m))){
            out.println("Yes");
        }else{
            out.println("No");
        }
        
        out.close();
        
    } BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out)); out new PrintWriter(new OutputStreamWriter(System.out)) String[] input1 = br.readLine().split(" "); input1 br.readLine().split(" ") br.readLine().split br.readLine() br.readLine br " " int n = Integer.parseInt(input1[0]); n Integer.parseInt(input1[0]) Integer.parseInt Integer input1[0] input1 0 double m = Double.parseDouble(input1[1]); m Double.parseDouble(input1[1]) Double.parseDouble Double input1[1] input1 1 String[] input2 = br.readLine().split(" "); input2 br.readLine().split(" ") br.readLine().split br.readLine() br.readLine br " " Integer[] votes = new Integer[n]; votes new Integer[n] n int voteCount = 0; voteCount 0 for(int i = 0; i < n; i++){
            votes[i] = Integer.valueOf(input2[i]);
            voteCount += votes[i];
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            votes[i] = Integer.valueOf(input2[i]);
            voteCount += votes[i];
        } {
            votes[i] = Integer.valueOf(input2[i]);
            voteCount += votes[i];
        } votes[i] = Integer.valueOf(input2[i]) votes[i] votes i Integer.valueOf(input2[i]) Integer.valueOf Integer input2[i] input2 i voteCount += votes[i] voteCount votes[i] votes i Arrays.sort(votes, Collections.reverseOrder()) Arrays.sort Arrays votes Collections.reverseOrder() Collections.reverseOrder Collections if(votes[(int)(m - 1)] >= voteCount * (1 / (4 * m))){
            out.println("Yes");
        }else{
            out.println("No");
        } votes[(int)(m - 1)] >= voteCount * (1 / (4 * m)) votes[(int)(m - 1)] votes (int)(m - 1) m 1 voteCount * (1 / (4 * m)) voteCount (1 / (4 * m)) 1 (4 * m) 4 m {
            out.println("Yes");
        } out.println("Yes") out.println out "Yes" {
            out.println("No");
        } out.println("No") out.println out "No" out.close() out.close out String[] args args public class Main {
    public static void main(String[] args) throws Exception {

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));
        
        String[] input1 = br.readLine().split(" ");
        int n = Integer.parseInt(input1[0]);
        double m = Double.parseDouble(input1[1]);
        
        String[] input2 = br.readLine().split(" ");
        Integer[] votes = new Integer[n];
        
        int voteCount = 0;
        
        for(int i = 0; i < n; i++){
            votes[i] = Integer.valueOf(input2[i]);
            voteCount += votes[i];
        }
        
        Arrays.sort(votes, Collections.reverseOrder());
        
        if(votes[(int)(m - 1)] >= voteCount * (1 / (4 * m))){
            out.println("Yes");
        }else{
            out.println("No");
        }
        
        out.close();
        
    }
} public class Main {
    public static void main(String[] args) throws Exception {

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));
        
        String[] input1 = br.readLine().split(" ");
        int n = Integer.parseInt(input1[0]);
        double m = Double.parseDouble(input1[1]);
        
        String[] input2 = br.readLine().split(" ");
        Integer[] votes = new Integer[n];
        
        int voteCount = 0;
        
        for(int i = 0; i < n; i++){
            votes[i] = Integer.valueOf(input2[i]);
            voteCount += votes[i];
        }
        
        Arrays.sort(votes, Collections.reverseOrder());
        
        if(votes[(int)(m - 1)] >= voteCount * (1 / (4 * m))){
            out.println("Yes");
        }else{
            out.println("No");
        }
        
        out.close();
        
    }
} Main
import java.util.*;
import java.io.*;

public class Main {
    public static void main(String[] args) throws Exception {

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));
        
        String[] input1 = br.readLine().split(" ");
        int n = Integer.parseInt(input1[0]);
        double m = Double.parseDouble(input1[1]);
        
        String[] input2 = br.readLine().split(" ");
        Integer[] votes = new Integer[n];
        
        int voteCount = 0;
        
        for(int i = 0; i < n; i++){
            votes[i] = Integer.valueOf(input2[i]);
            voteCount += votes[i];
        }
        
        Arrays.sort(votes, Collections.reverseOrder());
        
        if(votes[(int)(m - 1)] >= voteCount * (1 / (4 * m))){
            out.println("Yes");
        }else{
            out.println("No");
        }
        
        out.close();
        
    }
}