import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        double m = sc.nextDouble();
        double[] a = new double[n];
        double sum = 0.0;
        for (int i = 0; i < n; i++) {
            a[i] = sc.nextDouble();
            sum += a[i];
        }
        double ans = 0.0;
        double tmp = sum / (m * 4.0);
        for (int i = 0; i < n; i++) {
            if(a[i] >= tmp) ans++;
        }
        if(ans >= 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();
        double m = sc.nextDouble();
        double[] a = new double[n];
        double sum = 0.0;
        for (int i = 0; i < n; i++) {
            a[i] = sc.nextDouble();
            sum += a[i];
        }
        double ans = 0.0;
        double tmp = sum / (m * 4.0);
        for (int i = 0; i < n; i++) {
            if(a[i] >= tmp) ans++;
        }
        if(ans >= 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();
        double m = sc.nextDouble();
        double[] a = new double[n];
        double sum = 0.0;
        for (int i = 0; i < n; i++) {
            a[i] = sc.nextDouble();
            sum += a[i];
        }
        double ans = 0.0;
        double tmp = sum / (m * 4.0);
        for (int i = 0; i < n; i++) {
            if(a[i] >= tmp) ans++;
        }
        if(ans >= m) System.out.println("Yes");
        else System.out.println("No");
    } main {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        double m = sc.nextDouble();
        double[] a = new double[n];
        double sum = 0.0;
        for (int i = 0; i < n; i++) {
            a[i] = sc.nextDouble();
            sum += a[i];
        }
        double ans = 0.0;
        double tmp = sum / (m * 4.0);
        for (int i = 0; i < n; i++) {
            if(a[i] >= tmp) ans++;
        }
        if(ans >= 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 double m = sc.nextDouble(); m sc.nextDouble() sc.nextDouble sc double[] a = new double[n]; a new double[n] n double sum = 0.0; sum 0.0 for (int i = 0; i < n; i++) {
            a[i] = sc.nextDouble();
            sum += a[i];
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            a[i] = sc.nextDouble();
            sum += a[i];
        } {
            a[i] = sc.nextDouble();
            sum += a[i];
        } a[i] = sc.nextDouble() a[i] a i sc.nextDouble() sc.nextDouble sc sum += a[i] sum a[i] a i double ans = 0.0; ans 0.0 double tmp = sum / (m * 4.0); tmp sum / (m * 4.0) sum (m * 4.0) m 4.0 for (int i = 0; i < n; i++) {
            if(a[i] >= tmp) ans++;
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            if(a[i] >= tmp) ans++;
        } {
            if(a[i] >= tmp) ans++;
        } if(a[i] >= tmp) ans++; a[i] >= tmp a[i] a i tmp ans++ ans if(ans >= m) System.out.println("Yes");
        else System.out.println("No"); ans >= m ans m System.out.println("Yes") System.out.println System.out System System.out "Yes" 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();
        double m = sc.nextDouble();
        double[] a = new double[n];
        double sum = 0.0;
        for (int i = 0; i < n; i++) {
            a[i] = sc.nextDouble();
            sum += a[i];
        }
        double ans = 0.0;
        double tmp = sum / (m * 4.0);
        for (int i = 0; i < n; i++) {
            if(a[i] >= tmp) ans++;
        }
        if(ans >= 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();
        double m = sc.nextDouble();
        double[] a = new double[n];
        double sum = 0.0;
        for (int i = 0; i < n; i++) {
            a[i] = sc.nextDouble();
            sum += a[i];
        }
        double ans = 0.0;
        double tmp = sum / (m * 4.0);
        for (int i = 0; i < n; i++) {
            if(a[i] >= tmp) ans++;
        }
        if(ans >= 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();
        double m = sc.nextDouble();
        double[] a = new double[n];
        double sum = 0.0;
        for (int i = 0; i < n; i++) {
            a[i] = sc.nextDouble();
            sum += a[i];
        }
        double ans = 0.0;
        double tmp = sum / (m * 4.0);
        for (int i = 0; i < n; i++) {
            if(a[i] >= tmp) ans++;
        }
        if(ans >= m) System.out.println("Yes");
        else System.out.println("No");
    }
}