import java.util.Scanner;

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 count = 0;

        for (int k: a) {
            if (k * 4 * M < sum) continue;
            else count++;
        }
        if (count >= 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) {
        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 count = 0;

        for (int k: a) {
            if (k * 4 * M < sum) continue;
            else 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 count = 0;

        for (int k: a) {
            if (k * 4 * M < sum) continue;
            else 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 count = 0;

        for (int k: a) {
            if (k * 4 * M < sum) continue;
            else 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 count = 0; count 0 for (int k: a) {
            if (k * 4 * M < sum) continue;
            else count++;
        } int k a {
            if (k * 4 * M < sum) continue;
            else count++;
        } {
            if (k * 4 * M < sum) continue;
            else count++;
        } if (k * 4 * M < sum) continue;
            else count++; k * 4 * M < sum k * 4 * M k * 4 * M k 4 M sum continue; 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 count = 0;

        for (int k: a) {
            if (k * 4 * M < sum) continue;
            else 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 count = 0;

        for (int k: a) {
            if (k * 4 * M < sum) continue;
            else count++;
        }
        if (count >= M) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} Main
import java.util.Scanner;

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 count = 0;

        for (int k: a) {
            if (k * 4 * M < sum) continue;
            else count++;
        }
        if (count >= M) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
}