import java.util.Arrays;
import java.util.Comparator;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        Integer N = input.nextInt();
        Integer M = input.nextInt();
        Integer[] A = new Integer[N];
        int sum = 0;
        for (int i = 0; i < N; i++) {
            A[i] = input.nextInt();
            sum += A[i];
        }
        Arrays.sort(A, Comparator.reverseOrder());
        if ((A[M-1] * 4 * M) >= sum){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} import java.util.Arrays; Arrays java.util import java.util.Comparator; Comparator java.util import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        Integer N = input.nextInt();
        Integer M = input.nextInt();
        Integer[] A = new Integer[N];
        int sum = 0;
        for (int i = 0; i < N; i++) {
            A[i] = input.nextInt();
            sum += A[i];
        }
        Arrays.sort(A, Comparator.reverseOrder());
        if ((A[M-1] * 4 * M) >= sum){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} Main public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        Integer N = input.nextInt();
        Integer M = input.nextInt();
        Integer[] A = new Integer[N];
        int sum = 0;
        for (int i = 0; i < N; i++) {
            A[i] = input.nextInt();
            sum += A[i];
        }
        Arrays.sort(A, Comparator.reverseOrder());
        if ((A[M-1] * 4 * M) >= sum){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    } main {
        Scanner input = new Scanner(System.in);
        Integer N = input.nextInt();
        Integer M = input.nextInt();
        Integer[] A = new Integer[N];
        int sum = 0;
        for (int i = 0; i < N; i++) {
            A[i] = input.nextInt();
            sum += A[i];
        }
        Arrays.sort(A, Comparator.reverseOrder());
        if ((A[M-1] * 4 * M) >= sum){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    } Scanner input = new Scanner(System.in); input new Scanner(System.in) Integer N = input.nextInt(); N input.nextInt() input.nextInt input Integer M = input.nextInt(); M input.nextInt() input.nextInt input Integer[] A = new Integer[N]; A new Integer[N] N int sum = 0; sum 0 for (int i = 0; i < N; i++) {
            A[i] = input.nextInt();
            sum += A[i];
        } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
            A[i] = input.nextInt();
            sum += A[i];
        } {
            A[i] = input.nextInt();
            sum += A[i];
        } A[i] = input.nextInt() A[i] A i input.nextInt() input.nextInt input sum += A[i] sum A[i] A i Arrays.sort(A, Comparator.reverseOrder()) Arrays.sort Arrays A Comparator.reverseOrder() Comparator.reverseOrder Comparator if ((A[M-1] * 4 * M) >= sum){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        } (A[M-1] * 4 * M) >= sum (A[M-1] * 4 * M) A[M-1] * 4 * M A[M-1] A M-1 M 1 4 M sum {
            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 input = new Scanner(System.in);
        Integer N = input.nextInt();
        Integer M = input.nextInt();
        Integer[] A = new Integer[N];
        int sum = 0;
        for (int i = 0; i < N; i++) {
            A[i] = input.nextInt();
            sum += A[i];
        }
        Arrays.sort(A, Comparator.reverseOrder());
        if ((A[M-1] * 4 * M) >= sum){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} public class Main {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        Integer N = input.nextInt();
        Integer M = input.nextInt();
        Integer[] A = new Integer[N];
        int sum = 0;
        for (int i = 0; i < N; i++) {
            A[i] = input.nextInt();
            sum += A[i];
        }
        Arrays.sort(A, Comparator.reverseOrder());
        if ((A[M-1] * 4 * M) >= sum){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} Main
import java.util.Arrays;
import java.util.Comparator;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        Integer N = input.nextInt();
        Integer M = input.nextInt();
        Integer[] A = new Integer[N];
        int sum = 0;
        for (int i = 0; i < N; i++) {
            A[i] = input.nextInt();
            sum += A[i];
        }
        Arrays.sort(A, Comparator.reverseOrder());
        if ((A[M-1] * 4 * M) >= sum){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
}
