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