import 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 sum = 0;
        for (int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
            sum+= a[i];
        }

        int th = sum / (4 * m);
        if (sum % (4 * m) != 0) th++;
        int count = 0;
        for (int i = 0; i < n; i++) {
            if (a[i] >= th) count++;
        }

        if (count >= m ){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} import java.util.*; util.* java 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 sum = 0;
        for (int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
            sum+= a[i];
        }

        int th = sum / (4 * m);
        if (sum % (4 * m) != 0) th++;
        int count = 0;
        for (int i = 0; i < n; i++) {
            if (a[i] >= th) count++;
        }

        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 = sc.nextInt();
        int m = sc.nextInt();
        int[] a = new int[n];
        int sum = 0;
        for (int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
            sum+= a[i];
        }

        int th = sum / (4 * m);
        if (sum % (4 * m) != 0) th++;
        int count = 0;
        for (int i = 0; i < n; i++) {
            if (a[i] >= th) count++;
        }

        if (count >= m ){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    } main {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        int[] a = new int[n];
        int sum = 0;
        for (int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
            sum+= a[i];
        }

        int th = sum / (4 * m);
        if (sum % (4 * m) != 0) th++;
        int count = 0;
        for (int i = 0; i < n; i++) {
            if (a[i] >= th) count++;
        }

        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 = 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 sum = 0; sum 0 for (int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
            sum+= a[i];
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            a[i] = sc.nextInt();
            sum+= a[i];
        } {
            a[i] = sc.nextInt();
            sum+= a[i];
        } a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc sum+= a[i] sum a[i] a i int th = sum / (4 * m); th sum / (4 * m) sum (4 * m) 4 m if (sum % (4 * m) != 0) th++; sum % (4 * m) != 0 sum % (4 * m) sum (4 * m) 4 m 0 th++ th int count = 0; count 0 for (int i = 0; i < n; i++) {
            if (a[i] >= th) count++;
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            if (a[i] >= th) count++;
        } {
            if (a[i] >= th) count++;
        } if (a[i] >= th) count++; a[i] >= th a[i] a i th 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("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 = sc.nextInt();
        int m = sc.nextInt();
        int[] a = new int[n];
        int sum = 0;
        for (int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
            sum+= a[i];
        }

        int th = sum / (4 * m);
        if (sum % (4 * m) != 0) th++;
        int count = 0;
        for (int i = 0; i < n; i++) {
            if (a[i] >= th) count++;
        }

        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 = sc.nextInt();
        int m = sc.nextInt();
        int[] a = new int[n];
        int sum = 0;
        for (int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
            sum+= a[i];
        }

        int th = sum / (4 * m);
        if (sum % (4 * m) != 0) th++;
        int count = 0;
        for (int i = 0; i < n; i++) {
            if (a[i] >= th) count++;
        }

        if (count >= m ){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} Main
import 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 sum = 0;
        for (int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
            sum+= a[i];
        }

        int th = sum / (4 * m);
        if (sum % (4 * m) != 0) th++;
        int count = 0;
        for (int i = 0; i < n; i++) {
            if (a[i] >= th) count++;
        }

        if (count >= m ){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
}
