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

public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int N = Integer.parseInt(sc.next());
        int M = Integer.parseInt(sc.next());
        int count = 0;
        int total =0;
        ArrayList<Integer> l = new ArrayList<>();
        for(int i = 0; i < N ;i++){
            int num = Integer.parseInt(sc.next());
            total += num;
            l.add(num);
        }
        float border = total/(4f*M);
        for(Integer i : l){
            if((float)i >= border){
                count += 1;
            }
        }
        if(count >= M){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }
} import java.util.ArrayList; ArrayList java.util import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int N = Integer.parseInt(sc.next());
        int M = Integer.parseInt(sc.next());
        int count = 0;
        int total =0;
        ArrayList<Integer> l = new ArrayList<>();
        for(int i = 0; i < N ;i++){
            int num = Integer.parseInt(sc.next());
            total += num;
            l.add(num);
        }
        float border = total/(4f*M);
        for(Integer i : l){
            if((float)i >= border){
                count += 1;
            }
        }
        if(count >= M){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }
} Main public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int N = Integer.parseInt(sc.next());
        int M = Integer.parseInt(sc.next());
        int count = 0;
        int total =0;
        ArrayList<Integer> l = new ArrayList<>();
        for(int i = 0; i < N ;i++){
            int num = Integer.parseInt(sc.next());
            total += num;
            l.add(num);
        }
        float border = total/(4f*M);
        for(Integer i : l){
            if((float)i >= border){
                count += 1;
            }
        }
        if(count >= M){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    } main {
        Scanner sc = new Scanner(System.in);
        int N = Integer.parseInt(sc.next());
        int M = Integer.parseInt(sc.next());
        int count = 0;
        int total =0;
        ArrayList<Integer> l = new ArrayList<>();
        for(int i = 0; i < N ;i++){
            int num = Integer.parseInt(sc.next());
            total += num;
            l.add(num);
        }
        float border = total/(4f*M);
        for(Integer i : l){
            if((float)i >= border){
                count += 1;
            }
        }
        if(count >= M){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = Integer.parseInt(sc.next()); N Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc int M = Integer.parseInt(sc.next()); M Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc int count = 0; count 0 int total =0; total 0 ArrayList<Integer> l = new ArrayList<>(); l new ArrayList<>() for(int i = 0; i < N ;i++){
            int num = Integer.parseInt(sc.next());
            total += num;
            l.add(num);
        } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
            int num = Integer.parseInt(sc.next());
            total += num;
            l.add(num);
        } {
            int num = Integer.parseInt(sc.next());
            total += num;
            l.add(num);
        } int num = Integer.parseInt(sc.next()); num Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc total += num total num l.add(num) l.add l num float border = total/(4f*M); border total/(4f*M) total (4f*M) 4f M for(Integer i : l){
            if((float)i >= border){
                count += 1;
            }
        } Integer i l {
            if((float)i >= border){
                count += 1;
            }
        } {
            if((float)i >= border){
                count += 1;
            }
        } if((float)i >= border){
                count += 1;
            } (float)i >= border (float)i border {
                count += 1;
            } count += 1 count 1 if(count >= M){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        } count >= M count 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){
        Scanner sc = new Scanner(System.in);
        int N = Integer.parseInt(sc.next());
        int M = Integer.parseInt(sc.next());
        int count = 0;
        int total =0;
        ArrayList<Integer> l = new ArrayList<>();
        for(int i = 0; i < N ;i++){
            int num = Integer.parseInt(sc.next());
            total += num;
            l.add(num);
        }
        float border = total/(4f*M);
        for(Integer i : l){
            if((float)i >= border){
                count += 1;
            }
        }
        if(count >= M){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }
} public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int N = Integer.parseInt(sc.next());
        int M = Integer.parseInt(sc.next());
        int count = 0;
        int total =0;
        ArrayList<Integer> l = new ArrayList<>();
        for(int i = 0; i < N ;i++){
            int num = Integer.parseInt(sc.next());
            total += num;
            l.add(num);
        }
        float border = total/(4f*M);
        for(Integer i : l){
            if((float)i >= border){
                count += 1;
            }
        }
        if(count >= M){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }
} Main
import java.util.ArrayList;
import java.util.Scanner;

public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int N = Integer.parseInt(sc.next());
        int M = Integer.parseInt(sc.next());
        int count = 0;
        int total =0;
        ArrayList<Integer> l = new ArrayList<>();
        for(int i = 0; i < N ;i++){
            int num = Integer.parseInt(sc.next());
            total += num;
            l.add(num);
        }
        float border = total/(4f*M);
        for(Integer i : l){
            if((float)i >= border){
                count += 1;
            }
        }
        if(count >= M){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }
}