import java.util.Arrays;
import java.util.Collections;
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();
		Integer[] a = new Integer[n];

		double total = 0;
		for (int i=0; i<n; i++) {
			a[i]=new Integer(sc.nextInt());
			total += a[i];
		}
		sc.close();		
		String ans = "Yes";
		Arrays.sort(a, Collections.reverseOrder());

		for (int i=0; i<m; i++) {
			if (a[i]<total/(m*4)) {
				ans = "No";
				break;
			}
		}
		System.out.println(ans);
	}
} import java.util.Arrays; Arrays java.util import java.util.Collections; Collections java.util 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();
		Integer[] a = new Integer[n];

		double total = 0;
		for (int i=0; i<n; i++) {
			a[i]=new Integer(sc.nextInt());
			total += a[i];
		}
		sc.close();		
		String ans = "Yes";
		Arrays.sort(a, Collections.reverseOrder());

		for (int i=0; i<m; i++) {
			if (a[i]<total/(m*4)) {
				ans = "No";
				break;
			}
		}
		System.out.println(ans);
	}
} Main public static void main(String[] args)
	{
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		Integer[] a = new Integer[n];

		double total = 0;
		for (int i=0; i<n; i++) {
			a[i]=new Integer(sc.nextInt());
			total += a[i];
		}
		sc.close();		
		String ans = "Yes";
		Arrays.sort(a, Collections.reverseOrder());

		for (int i=0; i<m; i++) {
			if (a[i]<total/(m*4)) {
				ans = "No";
				break;
			}
		}
		System.out.println(ans);
	} main {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		Integer[] a = new Integer[n];

		double total = 0;
		for (int i=0; i<n; i++) {
			a[i]=new Integer(sc.nextInt());
			total += a[i];
		}
		sc.close();		
		String ans = "Yes";
		Arrays.sort(a, Collections.reverseOrder());

		for (int i=0; i<m; i++) {
			if (a[i]<total/(m*4)) {
				ans = "No";
				break;
			}
		}
		System.out.println(ans);
	} 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 Integer[] a = new Integer[n]; a new Integer[n] n double total = 0; total 0 for (int i=0; i<n; i++) {
			a[i]=new Integer(sc.nextInt());
			total += a[i];
		} int i=0; int i=0; i 0 i<n i n i++ i++ i {
			a[i]=new Integer(sc.nextInt());
			total += a[i];
		} {
			a[i]=new Integer(sc.nextInt());
			total += a[i];
		} a[i]=new Integer(sc.nextInt()) a[i] a i new Integer(sc.nextInt()) total += a[i] total a[i] a i sc.close() sc.close sc String ans = "Yes"; ans "Yes" Arrays.sort(a, Collections.reverseOrder()) Arrays.sort Arrays a Collections.reverseOrder() Collections.reverseOrder Collections for (int i=0; i<m; i++) {
			if (a[i]<total/(m*4)) {
				ans = "No";
				break;
			}
		} int i=0; int i=0; i 0 i<m i m i++ i++ i {
			if (a[i]<total/(m*4)) {
				ans = "No";
				break;
			}
		} {
			if (a[i]<total/(m*4)) {
				ans = "No";
				break;
			}
		} if (a[i]<total/(m*4)) {
				ans = "No";
				break;
			} a[i]<total/(m*4) a[i] a i total/(m*4) total (m*4) m 4 {
				ans = "No";
				break;
			} ans = "No" ans "No" break; System.out.println(ans) System.out.println System.out System System.out ans 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();
		Integer[] a = new Integer[n];

		double total = 0;
		for (int i=0; i<n; i++) {
			a[i]=new Integer(sc.nextInt());
			total += a[i];
		}
		sc.close();		
		String ans = "Yes";
		Arrays.sort(a, Collections.reverseOrder());

		for (int i=0; i<m; i++) {
			if (a[i]<total/(m*4)) {
				ans = "No";
				break;
			}
		}
		System.out.println(ans);
	}
} public class Main
{
	public static void main(String[] args)
	{
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		Integer[] a = new Integer[n];

		double total = 0;
		for (int i=0; i<n; i++) {
			a[i]=new Integer(sc.nextInt());
			total += a[i];
		}
		sc.close();		
		String ans = "Yes";
		Arrays.sort(a, Collections.reverseOrder());

		for (int i=0; i<m; i++) {
			if (a[i]<total/(m*4)) {
				ans = "No";
				break;
			}
		}
		System.out.println(ans);
	}
} Main
import java.util.Arrays;
import java.util.Collections;
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();
		Integer[] a = new Integer[n];

		double total = 0;
		for (int i=0; i<n; i++) {
			a[i]=new Integer(sc.nextInt());
			total += a[i];
		}
		sc.close();		
		String ans = "Yes";
		Arrays.sort(a, Collections.reverseOrder());

		for (int i=0; i<m; i++) {
			if (a[i]<total/(m*4)) {
				ans = "No";
				break;
			}
		}
		System.out.println(ans);
	}
}
