import java.util.Scanner;

class Main {
    public static void main(String[] args) {
        Scanner s = new Scanner(System.in);
        int n = s.nextInt(), m = s.nextInt();
        Integer[] arr = new Integer[n];
        int sum = 0;
        for (int i = 0; i < n; i++) {
            arr[i] = s.nextInt();
            sum += arr[i];
        }
        double div = (double) sum / (4*m);
        for(int i = 0; i < n && m > 0; i++) {
            if(arr[i] >= div) {
                m--;
            }
        }
        if(m <= 0) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} import java.util.Scanner; Scanner java.util class Main {
    public static void main(String[] args) {
        Scanner s = new Scanner(System.in);
        int n = s.nextInt(), m = s.nextInt();
        Integer[] arr = new Integer[n];
        int sum = 0;
        for (int i = 0; i < n; i++) {
            arr[i] = s.nextInt();
            sum += arr[i];
        }
        double div = (double) sum / (4*m);
        for(int i = 0; i < n && m > 0; i++) {
            if(arr[i] >= div) {
                m--;
            }
        }
        if(m <= 0) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} Main public static void main(String[] args) {
        Scanner s = new Scanner(System.in);
        int n = s.nextInt(), m = s.nextInt();
        Integer[] arr = new Integer[n];
        int sum = 0;
        for (int i = 0; i < n; i++) {
            arr[i] = s.nextInt();
            sum += arr[i];
        }
        double div = (double) sum / (4*m);
        for(int i = 0; i < n && m > 0; i++) {
            if(arr[i] >= div) {
                m--;
            }
        }
        if(m <= 0) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    } main {
        Scanner s = new Scanner(System.in);
        int n = s.nextInt(), m = s.nextInt();
        Integer[] arr = new Integer[n];
        int sum = 0;
        for (int i = 0; i < n; i++) {
            arr[i] = s.nextInt();
            sum += arr[i];
        }
        double div = (double) sum / (4*m);
        for(int i = 0; i < n && m > 0; i++) {
            if(arr[i] >= div) {
                m--;
            }
        }
        if(m <= 0) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    } Scanner s = new Scanner(System.in); s new Scanner(System.in) int n = s.nextInt() n s.nextInt() s.nextInt s m = s.nextInt(); m s.nextInt() s.nextInt s Integer[] arr = new Integer[n]; arr new Integer[n] n int sum = 0; sum 0 for (int i = 0; i < n; i++) {
            arr[i] = s.nextInt();
            sum += arr[i];
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            arr[i] = s.nextInt();
            sum += arr[i];
        } {
            arr[i] = s.nextInt();
            sum += arr[i];
        } arr[i] = s.nextInt() arr[i] arr i s.nextInt() s.nextInt s sum += arr[i] sum arr[i] arr i double div = (double) sum / (4*m); div (double) sum / (4*m) (double) sum (4*m) 4 m for(int i = 0; i < n && m > 0; i++) {
            if(arr[i] >= div) {
                m--;
            }
        } int i = 0; int i = 0; i 0 i < n && m > 0 i < n i n m > 0 m 0 i++ i++ i {
            if(arr[i] >= div) {
                m--;
            }
        } {
            if(arr[i] >= div) {
                m--;
            }
        } if(arr[i] >= div) {
                m--;
            } arr[i] >= div arr[i] arr i div {
                m--;
            } m-- m if(m <= 0) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        } m <= 0 m 0 {
            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
import java.util.Scanner;

class Main {
    public static void main(String[] args) {
        Scanner s = new Scanner(System.in);
        int n = s.nextInt(), m = s.nextInt();
        Integer[] arr = new Integer[n];
        int sum = 0;
        for (int i = 0; i < n; i++) {
            arr[i] = s.nextInt();
            sum += arr[i];
        }
        double div = (double) sum / (4*m);
        for(int i = 0; i < n && m > 0; i++) {
            if(arr[i] >= div) {
                m--;
            }
        }
        if(m <= 0) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
}