import java.util.Scanner;
import java.util.Arrays;
public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        int[] a = new int[n];
        int s = 0;
        for(int i = 0 ; i < n ; i++ ){
            a[i] = sc.nextInt();
            s += a[i];
        }
        Arrays.sort(a);
        sc.close();
        if(1.0 * s / (4 * m) > a[n - m]){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        }
    }
} import java.util.Scanner; Scanner java.util import java.util.Arrays; Arrays java.util public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        int[] a = new int[n];
        int s = 0;
        for(int i = 0 ; i < n ; i++ ){
            a[i] = sc.nextInt();
            s += a[i];
        }
        Arrays.sort(a);
        sc.close();
        if(1.0 * s / (4 * m) > a[n - m]){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        }
    }
} Main public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        int[] a = new int[n];
        int s = 0;
        for(int i = 0 ; i < n ; i++ ){
            a[i] = sc.nextInt();
            s += a[i];
        }
        Arrays.sort(a);
        sc.close();
        if(1.0 * s / (4 * m) > a[n - m]){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        }
    } main {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        int[] a = new int[n];
        int s = 0;
        for(int i = 0 ; i < n ; i++ ){
            a[i] = sc.nextInt();
            s += a[i];
        }
        Arrays.sort(a);
        sc.close();
        if(1.0 * s / (4 * m) > a[n - m]){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        }
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc int m = sc.nextInt(); m sc.nextInt() sc.nextInt sc int[] a = new int[n]; a new int[n] n int s = 0; s 0 for(int i = 0 ; i < n ; i++ ){
            a[i] = sc.nextInt();
            s += a[i];
        } int i = 0 ; int i = 0 ; i 0 i < n i n i++ i++ i {
            a[i] = sc.nextInt();
            s += a[i];
        } {
            a[i] = sc.nextInt();
            s += a[i];
        } a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc s += a[i] s a[i] a i Arrays.sort(a) Arrays.sort Arrays a sc.close() sc.close sc if(1.0 * s / (4 * m) > a[n - m]){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        } 1.0 * s / (4 * m) > a[n - m] 1.0 * s / (4 * m) 1.0 * s 1.0 s (4 * m) 4 m a[n - m] a n - m n m {
            System.out.println("No");
        } System.out.println("No") System.out.println System.out System System.out "No" {
            System.out.println("Yes");
        } System.out.println("Yes") System.out.println System.out System System.out "Yes" String[] args args public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        int[] a = new int[n];
        int s = 0;
        for(int i = 0 ; i < n ; i++ ){
            a[i] = sc.nextInt();
            s += a[i];
        }
        Arrays.sort(a);
        sc.close();
        if(1.0 * s / (4 * m) > a[n - m]){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        }
    }
} public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        int[] a = new int[n];
        int s = 0;
        for(int i = 0 ; i < n ; i++ ){
            a[i] = sc.nextInt();
            s += a[i];
        }
        Arrays.sort(a);
        sc.close();
        if(1.0 * s / (4 * m) > a[n - m]){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        }
    }
} Main
import java.util.Scanner;
import java.util.Arrays;
public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        int[] a = new int[n];
        int s = 0;
        for(int i = 0 ; i < n ; i++ ){
            a[i] = sc.nextInt();
            s += a[i];
        }
        Arrays.sort(a);
        sc.close();
        if(1.0 * s / (4 * m) > a[n - m]){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        }
    }
}