import java.util.*;
public class Main{
	public static void main (String[] ages){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		double sum = 0;
		int count = 0;
		int[] a = new int[n];
		for(int i = 0;i<n;i++){
			a[i] = sc.nextInt();
			sum += a[i];
		}
		for(int i =0;i<n;i++){
			if(a[i]>=sum/(4*m)){
				count++;
			}
		}
		if(count>=m){
			System.out.println("Yes");
		}else{
			System.out.println("No");
		}
	}
} import java.util.*; util.* java public class Main{
	public static void main (String[] ages){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		double sum = 0;
		int count = 0;
		int[] a = new int[n];
		for(int i = 0;i<n;i++){
			a[i] = sc.nextInt();
			sum += a[i];
		}
		for(int i =0;i<n;i++){
			if(a[i]>=sum/(4*m)){
				count++;
			}
		}
		if(count>=m){
			System.out.println("Yes");
		}else{
			System.out.println("No");
		}
	}
} Main public static void main (String[] ages){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		double sum = 0;
		int count = 0;
		int[] a = new int[n];
		for(int i = 0;i<n;i++){
			a[i] = sc.nextInt();
			sum += a[i];
		}
		for(int i =0;i<n;i++){
			if(a[i]>=sum/(4*m)){
				count++;
			}
		}
		if(count>=m){
			System.out.println("Yes");
		}else{
			System.out.println("No");
		}
	} main {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		double sum = 0;
		int count = 0;
		int[] a = new int[n];
		for(int i = 0;i<n;i++){
			a[i] = sc.nextInt();
			sum += a[i];
		}
		for(int i =0;i<n;i++){
			if(a[i]>=sum/(4*m)){
				count++;
			}
		}
		if(count>=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 int m = sc.nextInt(); m sc.nextInt() sc.nextInt sc double sum = 0; sum 0 int count = 0; count 0 int[] a = new int[n]; a new int[n] n for(int i = 0;i<n;i++){
			a[i] = sc.nextInt();
			sum += a[i];
		} int i = 0; int i = 0; i 0 i<n i n i++ i++ i {
			a[i] = sc.nextInt();
			sum += a[i];
		} {
			a[i] = sc.nextInt();
			sum += a[i];
		} a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc sum += a[i] sum a[i] a i for(int i =0;i<n;i++){
			if(a[i]>=sum/(4*m)){
				count++;
			}
		} int i =0; int i =0; i 0 i<n i n i++ i++ i {
			if(a[i]>=sum/(4*m)){
				count++;
			}
		} {
			if(a[i]>=sum/(4*m)){
				count++;
			}
		} if(a[i]>=sum/(4*m)){
				count++;
			} a[i]>=sum/(4*m) a[i] a i sum/(4*m) sum (4*m) 4 m {
				count++;
			} count++ count if(count>=m){
			System.out.println("Yes");
		}else{
			System.out.println("No");
		} count>=m count 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[] ages ages public class Main{
	public static void main (String[] ages){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		double sum = 0;
		int count = 0;
		int[] a = new int[n];
		for(int i = 0;i<n;i++){
			a[i] = sc.nextInt();
			sum += a[i];
		}
		for(int i =0;i<n;i++){
			if(a[i]>=sum/(4*m)){
				count++;
			}
		}
		if(count>=m){
			System.out.println("Yes");
		}else{
			System.out.println("No");
		}
	}
} public class Main{
	public static void main (String[] ages){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		double sum = 0;
		int count = 0;
		int[] a = new int[n];
		for(int i = 0;i<n;i++){
			a[i] = sc.nextInt();
			sum += a[i];
		}
		for(int i =0;i<n;i++){
			if(a[i]>=sum/(4*m)){
				count++;
			}
		}
		if(count>=m){
			System.out.println("Yes");
		}else{
			System.out.println("No");
		}
	}
} Main
import java.util.*;
public class Main{
	public static void main (String[] ages){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		double sum = 0;
		int count = 0;
		int[] a = new int[n];
		for(int i = 0;i<n;i++){
			a[i] = sc.nextInt();
			sum += a[i];
		}
		for(int i =0;i<n;i++){
			if(a[i]>=sum/(4*m)){
				count++;
			}
		}
		if(count>=m){
			System.out.println("Yes");
		}else{
			System.out.println("No");
		}
	}
}