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 sum = 0;
      	for(int i = 0; i < n; i++){
        	a[i] = sc.nextInt();
          	sum += a[i];
        }
      	Arrays.sort(a);
      	double border = (double)sum/4.0/(double)m;      
      	int count = 0;
      	for(int i = n-1; i >= 0; i--){
        	if(a[i] >= border) count++;
          	else break;
        }
      	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 sc = new Scanner(System.in);
      	int n = sc.nextInt();
      	int m = sc.nextInt();
      	int[] a = new int[n];
      	int sum = 0;
      	for(int i = 0; i < n; i++){
        	a[i] = sc.nextInt();
          	sum += a[i];
        }
      	Arrays.sort(a);
      	double border = (double)sum/4.0/(double)m;      
      	int count = 0;
      	for(int i = n-1; i >= 0; i--){
        	if(a[i] >= border) count++;
          	else break;
        }
      	if(count>=m) System.out.println("Yes");
      	else System.out.println("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 sum = 0;
      	for(int i = 0; i < n; i++){
        	a[i] = sc.nextInt();
          	sum += a[i];
        }
      	Arrays.sort(a);
      	double border = (double)sum/4.0/(double)m;      
      	int count = 0;
      	for(int i = n-1; i >= 0; i--){
        	if(a[i] >= border) count++;
          	else break;
        }
      	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();
      	int[] a = new int[n];
      	int sum = 0;
      	for(int i = 0; i < n; i++){
        	a[i] = sc.nextInt();
          	sum += a[i];
        }
      	Arrays.sort(a);
      	double border = (double)sum/4.0/(double)m;      
      	int count = 0;
      	for(int i = n-1; i >= 0; i--){
        	if(a[i] >= border) count++;
          	else break;
        }
      	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 int[] a = new int[n]; a new int[n] n int sum = 0; sum 0 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 Arrays.sort(a) Arrays.sort Arrays a double border = (double)sum/4.0/(double)m; border (double)sum/4.0/(double)m (double)sum/4.0/(double)m (double)sum 4.0 (double)m int count = 0; count 0 for(int i = n-1; i >= 0; i--){
        	if(a[i] >= border) count++;
          	else break;
        } int i = n-1; int i = n-1; i n-1 n 1 i >= 0 i 0 i-- i-- i {
        	if(a[i] >= border) count++;
          	else break;
        } {
        	if(a[i] >= border) count++;
          	else break;
        } if(a[i] >= border) count++;
          	else break; a[i] >= border a[i] a i border count++ count break; if(count>=m) System.out.println("Yes");
      	else System.out.println("No"); count>=m count m System.out.println("Yes") System.out.println System.out System System.out "Yes" 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 sc = new Scanner(System.in);
      	int n = sc.nextInt();
      	int m = sc.nextInt();
      	int[] a = new int[n];
      	int sum = 0;
      	for(int i = 0; i < n; i++){
        	a[i] = sc.nextInt();
          	sum += a[i];
        }
      	Arrays.sort(a);
      	double border = (double)sum/4.0/(double)m;      
      	int count = 0;
      	for(int i = n-1; i >= 0; i--){
        	if(a[i] >= border) count++;
          	else break;
        }
      	if(count>=m) System.out.println("Yes");
      	else System.out.println("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 sum = 0;
      	for(int i = 0; i < n; i++){
        	a[i] = sc.nextInt();
          	sum += a[i];
        }
      	Arrays.sort(a);
      	double border = (double)sum/4.0/(double)m;      
      	int count = 0;
      	for(int i = n-1; i >= 0; i--){
        	if(a[i] >= border) count++;
          	else break;
        }
      	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 sc = new Scanner(System.in);
      	int n = sc.nextInt();
      	int m = sc.nextInt();
      	int[] a = new int[n];
      	int sum = 0;
      	for(int i = 0; i < n; i++){
        	a[i] = sc.nextInt();
          	sum += a[i];
        }
      	Arrays.sort(a);
      	double border = (double)sum/4.0/(double)m;      
      	int count = 0;
      	for(int i = n-1; i >= 0; i--){
        	if(a[i] >= border) count++;
          	else break;
        }
      	if(count>=m) System.out.println("Yes");
      	else System.out.println("No");
    }
}