import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner in = new Scanner(System.in);
        int n = in.nextInt(), m = in.nextInt(), a[] = new int[n], sum = 0, cnt = 0;
        for (int i = 0; i < n; i++) {
            a[i] = in.nextInt();
            sum += a[i];
        }
        if (sum % (4 * m) == 0)
            sum /= (4 * m);
        else {
            sum = sum / (4 * m) + 1;
        }
        for (int i = 0; i < n; i++) {
            if (a[i] >= sum)
                cnt++;
        }
        if (cnt >= m)
            System.out.println("Yes");
        else {
            System.out.println("No");
        }
    }

} import java.util.Scanner; Scanner java.util public class Main {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner in = new Scanner(System.in);
        int n = in.nextInt(), m = in.nextInt(), a[] = new int[n], sum = 0, cnt = 0;
        for (int i = 0; i < n; i++) {
            a[i] = in.nextInt();
            sum += a[i];
        }
        if (sum % (4 * m) == 0)
            sum /= (4 * m);
        else {
            sum = sum / (4 * m) + 1;
        }
        for (int i = 0; i < n; i++) {
            if (a[i] >= sum)
                cnt++;
        }
        if (cnt >= m)
            System.out.println("Yes");
        else {
            System.out.println("No");
        }
    }

} Main public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner in = new Scanner(System.in);
        int n = in.nextInt(), m = in.nextInt(), a[] = new int[n], sum = 0, cnt = 0;
        for (int i = 0; i < n; i++) {
            a[i] = in.nextInt();
            sum += a[i];
        }
        if (sum % (4 * m) == 0)
            sum /= (4 * m);
        else {
            sum = sum / (4 * m) + 1;
        }
        for (int i = 0; i < n; i++) {
            if (a[i] >= sum)
                cnt++;
        }
        if (cnt >= m)
            System.out.println("Yes");
        else {
            System.out.println("No");
        }
    } main {
        // TODO Auto-generated method stub
        Scanner in = new Scanner(System.in);
        int n = in.nextInt(), m = in.nextInt(), a[] = new int[n], sum = 0, cnt = 0;
        for (int i = 0; i < n; i++) {
            a[i] = in.nextInt();
            sum += a[i];
        }
        if (sum % (4 * m) == 0)
            sum /= (4 * m);
        else {
            sum = sum / (4 * m) + 1;
        }
        for (int i = 0; i < n; i++) {
            if (a[i] >= sum)
                cnt++;
        }
        if (cnt >= m)
            System.out.println("Yes");
        else {
            System.out.println("No");
        }
    } Scanner in = new Scanner(System.in); in new Scanner(System.in) int n = in.nextInt() n in.nextInt() in.nextInt in m = in.nextInt() m in.nextInt() in.nextInt in a[] = new int[n] a new int[n] n sum = 0 sum 0 cnt = 0; cnt 0 for (int i = 0; i < n; i++) {
            a[i] = in.nextInt();
            sum += a[i];
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            a[i] = in.nextInt();
            sum += a[i];
        } {
            a[i] = in.nextInt();
            sum += a[i];
        } a[i] = in.nextInt() a[i] a i in.nextInt() in.nextInt in sum += a[i] sum a[i] a i if (sum % (4 * m) == 0)
            sum /= (4 * m);
        else {
            sum = sum / (4 * m) + 1;
        } sum % (4 * m) == 0 sum % (4 * m) sum (4 * m) 4 m 0 sum /= (4 * m) sum (4 * m) 4 m {
            sum = sum / (4 * m) + 1;
        } sum = sum / (4 * m) + 1 sum sum / (4 * m) + 1 sum / (4 * m) sum (4 * m) 4 m 1 for (int i = 0; i < n; i++) {
            if (a[i] >= sum)
                cnt++;
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            if (a[i] >= sum)
                cnt++;
        } {
            if (a[i] >= sum)
                cnt++;
        } if (a[i] >= sum)
                cnt++; a[i] >= sum a[i] a i sum cnt++ cnt if (cnt >= m)
            System.out.println("Yes");
        else {
            System.out.println("No");
        } cnt >= m cnt m 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) {
        // TODO Auto-generated method stub
        Scanner in = new Scanner(System.in);
        int n = in.nextInt(), m = in.nextInt(), a[] = new int[n], sum = 0, cnt = 0;
        for (int i = 0; i < n; i++) {
            a[i] = in.nextInt();
            sum += a[i];
        }
        if (sum % (4 * m) == 0)
            sum /= (4 * m);
        else {
            sum = sum / (4 * m) + 1;
        }
        for (int i = 0; i < n; i++) {
            if (a[i] >= sum)
                cnt++;
        }
        if (cnt >= m)
            System.out.println("Yes");
        else {
            System.out.println("No");
        }
    }

} public class Main {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner in = new Scanner(System.in);
        int n = in.nextInt(), m = in.nextInt(), a[] = new int[n], sum = 0, cnt = 0;
        for (int i = 0; i < n; i++) {
            a[i] = in.nextInt();
            sum += a[i];
        }
        if (sum % (4 * m) == 0)
            sum /= (4 * m);
        else {
            sum = sum / (4 * m) + 1;
        }
        for (int i = 0; i < n; i++) {
            if (a[i] >= sum)
                cnt++;
        }
        if (cnt >= m)
            System.out.println("Yes");
        else {
            System.out.println("No");
        }
    }

} Main
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner in = new Scanner(System.in);
        int n = in.nextInt(), m = in.nextInt(), a[] = new int[n], sum = 0, cnt = 0;
        for (int i = 0; i < n; i++) {
            a[i] = in.nextInt();
            sum += a[i];
        }
        if (sum % (4 * m) == 0)
            sum /= (4 * m);
        else {
            sum = sum / (4 * m) + 1;
        }
        for (int i = 0; i < n; i++) {
            if (a[i] >= sum)
                cnt++;
        }
        if (cnt >= m)
            System.out.println("Yes");
        else {
            System.out.println("No");
        }
    }

}
