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];
        }
        sc.close();
        int cnt = 0;
        for (int i = 0; i < n; i++) {
            if ((double)a[i] >= (double)sum / (4*m)) cnt++;
        }
        String res = "No";
        if (m <= cnt) res = "Yes";
        
        System.out.println(res);
    }
} 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];
        }
        sc.close();
        int cnt = 0;
        for (int i = 0; i < n; i++) {
            if ((double)a[i] >= (double)sum / (4*m)) cnt++;
        }
        String res = "No";
        if (m <= cnt) res = "Yes";
        
        System.out.println(res);
    }
} 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];
        }
        sc.close();
        int cnt = 0;
        for (int i = 0; i < n; i++) {
            if ((double)a[i] >= (double)sum / (4*m)) cnt++;
        }
        String res = "No";
        if (m <= cnt) res = "Yes";
        
        System.out.println(res);
    } 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];
        }
        sc.close();
        int cnt = 0;
        for (int i = 0; i < n; i++) {
            if ((double)a[i] >= (double)sum / (4*m)) cnt++;
        }
        String res = "No";
        if (m <= cnt) res = "Yes";
        
        System.out.println(res);
    } 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 sc.close() sc.close sc int cnt = 0; cnt 0 for (int i = 0; i < n; i++) {
            if ((double)a[i] >= (double)sum / (4*m)) cnt++;
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            if ((double)a[i] >= (double)sum / (4*m)) cnt++;
        } {
            if ((double)a[i] >= (double)sum / (4*m)) cnt++;
        } if ((double)a[i] >= (double)sum / (4*m)) cnt++; (double)a[i] >= (double)sum / (4*m) (double)a[i] a i (double)sum / (4*m) (double)sum (4*m) 4 m cnt++ cnt String res = "No"; res "No" if (m <= cnt) res = "Yes"; m <= cnt m cnt res = "Yes" res "Yes" System.out.println(res) System.out.println System.out System System.out res 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];
        }
        sc.close();
        int cnt = 0;
        for (int i = 0; i < n; i++) {
            if ((double)a[i] >= (double)sum / (4*m)) cnt++;
        }
        String res = "No";
        if (m <= cnt) res = "Yes";
        
        System.out.println(res);
    }
} 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];
        }
        sc.close();
        int cnt = 0;
        for (int i = 0; i < n; i++) {
            if ((double)a[i] >= (double)sum / (4*m)) cnt++;
        }
        String res = "No";
        if (m <= cnt) res = "Yes";
        
        System.out.println(res);
    }
} 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];
        }
        sc.close();
        int cnt = 0;
        for (int i = 0; i < n; i++) {
            if ((double)a[i] >= (double)sum / (4*m)) cnt++;
        }
        String res = "No";
        if (m <= cnt) res = "Yes";
        
        System.out.println(res);
    }
}