import java.util.*;

public class Main {

    public static void main(String[] args) {
        Scanner stdIn = new Scanner(System.in);
        int N = stdIn.nextInt();
        int M = stdIn.nextInt();

        int[] A = new int[N];
        int sum = 0;
        for (int i = 0; i < N; i++) {
            A[i] = stdIn.nextInt();
            sum += A[i];
        }
        stdIn.close();

        int over = 0;
        for (int i = 0; i < N; i++) {
            if ((double)A[i] >= (double)sum / (4 * M)) {
                over++;
            }
        }

        if (over >= 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 stdIn = new Scanner(System.in);
        int N = stdIn.nextInt();
        int M = stdIn.nextInt();

        int[] A = new int[N];
        int sum = 0;
        for (int i = 0; i < N; i++) {
            A[i] = stdIn.nextInt();
            sum += A[i];
        }
        stdIn.close();

        int over = 0;
        for (int i = 0; i < N; i++) {
            if ((double)A[i] >= (double)sum / (4 * M)) {
                over++;
            }
        }

        if (over >= M) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} Main public static void main(String[] args) {
        Scanner stdIn = new Scanner(System.in);
        int N = stdIn.nextInt();
        int M = stdIn.nextInt();

        int[] A = new int[N];
        int sum = 0;
        for (int i = 0; i < N; i++) {
            A[i] = stdIn.nextInt();
            sum += A[i];
        }
        stdIn.close();

        int over = 0;
        for (int i = 0; i < N; i++) {
            if ((double)A[i] >= (double)sum / (4 * M)) {
                over++;
            }
        }

        if (over >= M) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    } main {
        Scanner stdIn = new Scanner(System.in);
        int N = stdIn.nextInt();
        int M = stdIn.nextInt();

        int[] A = new int[N];
        int sum = 0;
        for (int i = 0; i < N; i++) {
            A[i] = stdIn.nextInt();
            sum += A[i];
        }
        stdIn.close();

        int over = 0;
        for (int i = 0; i < N; i++) {
            if ((double)A[i] >= (double)sum / (4 * M)) {
                over++;
            }
        }

        if (over >= M) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    } Scanner stdIn = new Scanner(System.in); stdIn new Scanner(System.in) int N = stdIn.nextInt(); N stdIn.nextInt() stdIn.nextInt stdIn int M = stdIn.nextInt(); M stdIn.nextInt() stdIn.nextInt stdIn int[] A = new int[N]; A new int[N] N int sum = 0; sum 0 for (int i = 0; i < N; i++) {
            A[i] = stdIn.nextInt();
            sum += A[i];
        } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
            A[i] = stdIn.nextInt();
            sum += A[i];
        } {
            A[i] = stdIn.nextInt();
            sum += A[i];
        } A[i] = stdIn.nextInt() A[i] A i stdIn.nextInt() stdIn.nextInt stdIn sum += A[i] sum A[i] A i stdIn.close() stdIn.close stdIn int over = 0; over 0 for (int i = 0; i < N; i++) {
            if ((double)A[i] >= (double)sum / (4 * M)) {
                over++;
            }
        } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
            if ((double)A[i] >= (double)sum / (4 * M)) {
                over++;
            }
        } {
            if ((double)A[i] >= (double)sum / (4 * M)) {
                over++;
            }
        } if ((double)A[i] >= (double)sum / (4 * M)) {
                over++;
            } (double)A[i] >= (double)sum / (4 * M) (double)A[i] A i (double)sum / (4 * M) (double)sum (4 * M) 4 M {
                over++;
            } over++ over if (over >= M) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        } over >= M over 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 stdIn = new Scanner(System.in);
        int N = stdIn.nextInt();
        int M = stdIn.nextInt();

        int[] A = new int[N];
        int sum = 0;
        for (int i = 0; i < N; i++) {
            A[i] = stdIn.nextInt();
            sum += A[i];
        }
        stdIn.close();

        int over = 0;
        for (int i = 0; i < N; i++) {
            if ((double)A[i] >= (double)sum / (4 * M)) {
                over++;
            }
        }

        if (over >= M) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} public class Main {

    public static void main(String[] args) {
        Scanner stdIn = new Scanner(System.in);
        int N = stdIn.nextInt();
        int M = stdIn.nextInt();

        int[] A = new int[N];
        int sum = 0;
        for (int i = 0; i < N; i++) {
            A[i] = stdIn.nextInt();
            sum += A[i];
        }
        stdIn.close();

        int over = 0;
        for (int i = 0; i < N; i++) {
            if ((double)A[i] >= (double)sum / (4 * M)) {
                over++;
            }
        }

        if (over >= M) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} Main
import java.util.*;

public class Main {

    public static void main(String[] args) {
        Scanner stdIn = new Scanner(System.in);
        int N = stdIn.nextInt();
        int M = stdIn.nextInt();

        int[] A = new int[N];
        int sum = 0;
        for (int i = 0; i < N; i++) {
            A[i] = stdIn.nextInt();
            sum += A[i];
        }
        stdIn.close();

        int over = 0;
        for (int i = 0; i < N; i++) {
            if ((double)A[i] >= (double)sum / (4 * M)) {
                over++;
            }
        }

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