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

        int count = 0;
        for (int i = 0; i < a.length; i++) {
            if (((double)max) / (4 * m) <= a[i]) {
                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 max = 0;
        int a[] = new int[n];
        for (int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
            max += a[i];
        }
        sc.close();

        int count = 0;
        for (int i = 0; i < a.length; i++) {
            if (((double)max) / (4 * m) <= a[i]) {
                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 max = 0;
        int a[] = new int[n];
        for (int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
            max += a[i];
        }
        sc.close();

        int count = 0;
        for (int i = 0; i < a.length; i++) {
            if (((double)max) / (4 * m) <= a[i]) {
                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 max = 0;
        int a[] = new int[n];
        for (int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
            max += a[i];
        }
        sc.close();

        int count = 0;
        for (int i = 0; i < a.length; i++) {
            if (((double)max) / (4 * m) <= a[i]) {
                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 max = 0; max 0 int a[] = new int[n]; a new int[n] n for (int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
            max += a[i];
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            a[i] = sc.nextInt();
            max += a[i];
        } {
            a[i] = sc.nextInt();
            max += a[i];
        } a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc max += a[i] max a[i] a i sc.close() sc.close sc int count = 0; count 0 for (int i = 0; i < a.length; i++) {
            if (((double)max) / (4 * m) <= a[i]) {
                count++;
            }
        } int i = 0; int i = 0; i 0 i < a.length i a.length a a.length i++ i++ i {
            if (((double)max) / (4 * m) <= a[i]) {
                count++;
            }
        } {
            if (((double)max) / (4 * m) <= a[i]) {
                count++;
            }
        } if (((double)max) / (4 * m) <= a[i]) {
                count++;
            } ((double)max) / (4 * m) <= a[i] ((double)max) / (4 * m) ((double)max) (4 * m) 4 m a[i] a i {
                count++;
            } 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 max = 0;
        int a[] = new int[n];
        for (int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
            max += a[i];
        }
        sc.close();

        int count = 0;
        for (int i = 0; i < a.length; i++) {
            if (((double)max) / (4 * m) <= a[i]) {
                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 max = 0;
        int a[] = new int[n];
        for (int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
            max += a[i];
        }
        sc.close();

        int count = 0;
        for (int i = 0; i < a.length; i++) {
            if (((double)max) / (4 * m) <= a[i]) {
                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 max = 0;
        int a[] = new int[n];
        for (int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
            max += a[i];
        }
        sc.close();

        int count = 0;
        for (int i = 0; i < a.length; i++) {
            if (((double)max) / (4 * m) <= a[i]) {
                count++;
            }
        }

        if (count >= m) {
            System.out.println("Yes");

        } else {
            System.out.println("No");

        }
    }
}
