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();
        int sum = 0;
        int vote = 0;
        int[] a = new int[n];
        for(int i = 0; i < n; i++){
            a[i] = scanner.nextInt();
            vote += a[i];
        }
        for(int i = 0; i < n; i++){
            if(a[i] >= (double)vote/(4*m)){sum++;}
        }
        if(sum >= m){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
        return;
    }
} 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();
        int sum = 0;
        int vote = 0;
        int[] a = new int[n];
        for(int i = 0; i < n; i++){
            a[i] = scanner.nextInt();
            vote += a[i];
        }
        for(int i = 0; i < n; i++){
            if(a[i] >= (double)vote/(4*m)){sum++;}
        }
        if(sum >= m){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
        return;
    }
} Main public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        int m = scanner.nextInt();
        int sum = 0;
        int vote = 0;
        int[] a = new int[n];
        for(int i = 0; i < n; i++){
            a[i] = scanner.nextInt();
            vote += a[i];
        }
        for(int i = 0; i < n; i++){
            if(a[i] >= (double)vote/(4*m)){sum++;}
        }
        if(sum >= m){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
        return;
    } main {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        int m = scanner.nextInt();
        int sum = 0;
        int vote = 0;
        int[] a = new int[n];
        for(int i = 0; i < n; i++){
            a[i] = scanner.nextInt();
            vote += a[i];
        }
        for(int i = 0; i < n; i++){
            if(a[i] >= (double)vote/(4*m)){sum++;}
        }
        if(sum >= m){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
        return;
    } 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 int sum = 0; sum 0 int vote = 0; vote 0 int[] a = new int[n]; a new int[n] n for(int i = 0; i < n; i++){
            a[i] = scanner.nextInt();
            vote += a[i];
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            a[i] = scanner.nextInt();
            vote += a[i];
        } {
            a[i] = scanner.nextInt();
            vote += a[i];
        } a[i] = scanner.nextInt() a[i] a i scanner.nextInt() scanner.nextInt scanner vote += a[i] vote a[i] a i for(int i = 0; i < n; i++){
            if(a[i] >= (double)vote/(4*m)){sum++;}
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            if(a[i] >= (double)vote/(4*m)){sum++;}
        } {
            if(a[i] >= (double)vote/(4*m)){sum++;}
        } if(a[i] >= (double)vote/(4*m)){sum++;} a[i] >= (double)vote/(4*m) a[i] a i (double)vote/(4*m) (double)vote (4*m) 4 m {sum++;} sum++ sum if(sum >= m){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        } sum >= m sum 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" return; 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();
        int sum = 0;
        int vote = 0;
        int[] a = new int[n];
        for(int i = 0; i < n; i++){
            a[i] = scanner.nextInt();
            vote += a[i];
        }
        for(int i = 0; i < n; i++){
            if(a[i] >= (double)vote/(4*m)){sum++;}
        }
        if(sum >= m){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
        return;
    }
} public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        int m = scanner.nextInt();
        int sum = 0;
        int vote = 0;
        int[] a = new int[n];
        for(int i = 0; i < n; i++){
            a[i] = scanner.nextInt();
            vote += a[i];
        }
        for(int i = 0; i < n; i++){
            if(a[i] >= (double)vote/(4*m)){sum++;}
        }
        if(sum >= m){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
        return;
    }
} Main
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();
        int sum = 0;
        int vote = 0;
        int[] a = new int[n];
        for(int i = 0; i < n; i++){
            a[i] = scanner.nextInt();
            vote += a[i];
        }
        for(int i = 0; i < n; i++){
            if(a[i] >= (double)vote/(4*m)){sum++;}
        }
        if(sum >= m){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
        return;
    }
}