import java.util.*;
public class Main{
  public static void main(String[] args){
	Scanner s = new Scanner(System.in);
	int n = s.nextInt();
	int m = s.nextInt();
	int sum = 0;
	int[] arr = new int[n];
	for (int i = 0; i < n; i++) {
		int input = s.nextInt();
		sum += input;
		arr[i] = input;
	}
	double con = ((double)1/(4*m)) * sum;
	int count = 0;
	for (int i = 0; i < arr.length; i++) {
		if (arr[i] >= con) 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[] args){
	Scanner s = new Scanner(System.in);
	int n = s.nextInt();
	int m = s.nextInt();
	int sum = 0;
	int[] arr = new int[n];
	for (int i = 0; i < n; i++) {
		int input = s.nextInt();
		sum += input;
		arr[i] = input;
	}
	double con = ((double)1/(4*m)) * sum;
	int count = 0;
	for (int i = 0; i < arr.length; i++) {
		if (arr[i] >= con) count++;
	}
	
	if (count >= m) {
		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();
	int m = s.nextInt();
	int sum = 0;
	int[] arr = new int[n];
	for (int i = 0; i < n; i++) {
		int input = s.nextInt();
		sum += input;
		arr[i] = input;
	}
	double con = ((double)1/(4*m)) * sum;
	int count = 0;
	for (int i = 0; i < arr.length; i++) {
		if (arr[i] >= con) count++;
	}
	
	if (count >= m) {
		System.out.println("Yes");
	} else {
		System.out.println("No");	
	}
  } main {
	Scanner s = new Scanner(System.in);
	int n = s.nextInt();
	int m = s.nextInt();
	int sum = 0;
	int[] arr = new int[n];
	for (int i = 0; i < n; i++) {
		int input = s.nextInt();
		sum += input;
		arr[i] = input;
	}
	double con = ((double)1/(4*m)) * sum;
	int count = 0;
	for (int i = 0; i < arr.length; i++) {
		if (arr[i] >= con) count++;
	}
	
	if (count >= m) {
		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 int m = s.nextInt(); m s.nextInt() s.nextInt s int sum = 0; sum 0 int[] arr = new int[n]; arr new int[n] n for (int i = 0; i < n; i++) {
		int input = s.nextInt();
		sum += input;
		arr[i] = input;
	} int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
		int input = s.nextInt();
		sum += input;
		arr[i] = input;
	} {
		int input = s.nextInt();
		sum += input;
		arr[i] = input;
	} int input = s.nextInt(); input s.nextInt() s.nextInt s sum += input sum input arr[i] = input arr[i] arr i input double con = ((double)1/(4*m)) * sum; con ((double)1/(4*m)) * sum ((double)1/(4*m)) (double)1 (4*m) 4 m sum int count = 0; count 0 for (int i = 0; i < arr.length; i++) {
		if (arr[i] >= con) count++;
	} int i = 0; int i = 0; i 0 i < arr.length i arr.length arr arr.length i++ i++ i {
		if (arr[i] >= con) count++;
	} {
		if (arr[i] >= con) count++;
	} if (arr[i] >= con) count++; arr[i] >= con arr[i] arr i con 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[] args args public class Main{
  public static void main(String[] args){
	Scanner s = new Scanner(System.in);
	int n = s.nextInt();
	int m = s.nextInt();
	int sum = 0;
	int[] arr = new int[n];
	for (int i = 0; i < n; i++) {
		int input = s.nextInt();
		sum += input;
		arr[i] = input;
	}
	double con = ((double)1/(4*m)) * sum;
	int count = 0;
	for (int i = 0; i < arr.length; i++) {
		if (arr[i] >= con) count++;
	}
	
	if (count >= m) {
		System.out.println("Yes");
	} else {
		System.out.println("No");	
	}
  }
	

} public class Main{
  public static void main(String[] args){
	Scanner s = new Scanner(System.in);
	int n = s.nextInt();
	int m = s.nextInt();
	int sum = 0;
	int[] arr = new int[n];
	for (int i = 0; i < n; i++) {
		int input = s.nextInt();
		sum += input;
		arr[i] = input;
	}
	double con = ((double)1/(4*m)) * sum;
	int count = 0;
	for (int i = 0; i < arr.length; i++) {
		if (arr[i] >= con) 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[] args){
	Scanner s = new Scanner(System.in);
	int n = s.nextInt();
	int m = s.nextInt();
	int sum = 0;
	int[] arr = new int[n];
	for (int i = 0; i < n; i++) {
		int input = s.nextInt();
		sum += input;
		arr[i] = input;
	}
	double con = ((double)1/(4*m)) * sum;
	int count = 0;
	for (int i = 0; i < arr.length; i++) {
		if (arr[i] >= con) count++;
	}
	
	if (count >= m) {
		System.out.println("Yes");
	} else {
		System.out.println("No");	
	}
  }
	

}
