import java.util.*;
public class Main{
	public static void main(String[] args){
    	Scanner scanner = new Scanner(System.in);
      	int n = scanner.nextInt();
      	double m = scanner.nextFloat();
      	int total = 0;
      	int[] a = new int[n];
      	for(int i =0; i<n; i++){
        	a[i] = scanner.nextInt();
          	total += a[i];
        }
      	int num = 0;
      	for(int i =0; i<n; i++){
        	if(a[i] >= total/(4*m)){num += 1;}
        }
      if(num >= 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 scanner = new Scanner(System.in);
      	int n = scanner.nextInt();
      	double m = scanner.nextFloat();
      	int total = 0;
      	int[] a = new int[n];
      	for(int i =0; i<n; i++){
        	a[i] = scanner.nextInt();
          	total += a[i];
        }
      	int num = 0;
      	for(int i =0; i<n; i++){
        	if(a[i] >= total/(4*m)){num += 1;}
        }
      if(num >= m){
      	System.out.println("Yes");
      }else{
      	System.out.println("No");
      }
          
    }
} Main public static void main(String[] args){
    	Scanner scanner = new Scanner(System.in);
      	int n = scanner.nextInt();
      	double m = scanner.nextFloat();
      	int total = 0;
      	int[] a = new int[n];
      	for(int i =0; i<n; i++){
        	a[i] = scanner.nextInt();
          	total += a[i];
        }
      	int num = 0;
      	for(int i =0; i<n; i++){
        	if(a[i] >= total/(4*m)){num += 1;}
        }
      if(num >= m){
      	System.out.println("Yes");
      }else{
      	System.out.println("No");
      }
          
    } main {
    	Scanner scanner = new Scanner(System.in);
      	int n = scanner.nextInt();
      	double m = scanner.nextFloat();
      	int total = 0;
      	int[] a = new int[n];
      	for(int i =0; i<n; i++){
        	a[i] = scanner.nextInt();
          	total += a[i];
        }
      	int num = 0;
      	for(int i =0; i<n; i++){
        	if(a[i] >= total/(4*m)){num += 1;}
        }
      if(num >= m){
      	System.out.println("Yes");
      }else{
      	System.out.println("No");
      }
          
    } Scanner scanner = new Scanner(System.in); scanner new Scanner(System.in) int n = scanner.nextInt(); n scanner.nextInt() scanner.nextInt scanner double m = scanner.nextFloat(); m scanner.nextFloat() scanner.nextFloat scanner int total = 0; total 0 int[] a = new int[n]; a new int[n] n for(int i =0; i<n; i++){
        	a[i] = scanner.nextInt();
          	total += a[i];
        } int i =0; int i =0; i 0 i<n i n i++ i++ i {
        	a[i] = scanner.nextInt();
          	total += a[i];
        } {
        	a[i] = scanner.nextInt();
          	total += a[i];
        } a[i] = scanner.nextInt() a[i] a i scanner.nextInt() scanner.nextInt scanner total += a[i] total a[i] a i int num = 0; num 0 for(int i =0; i<n; i++){
        	if(a[i] >= total/(4*m)){num += 1;}
        } int i =0; int i =0; i 0 i<n i n i++ i++ i {
        	if(a[i] >= total/(4*m)){num += 1;}
        } {
        	if(a[i] >= total/(4*m)){num += 1;}
        } if(a[i] >= total/(4*m)){num += 1;} a[i] >= total/(4*m) a[i] a i total/(4*m) total (4*m) 4 m {num += 1;} num += 1 num 1 if(num >= m){
      	System.out.println("Yes");
      }else{
      	System.out.println("No");
      } num >= m num 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 scanner = new Scanner(System.in);
      	int n = scanner.nextInt();
      	double m = scanner.nextFloat();
      	int total = 0;
      	int[] a = new int[n];
      	for(int i =0; i<n; i++){
        	a[i] = scanner.nextInt();
          	total += a[i];
        }
      	int num = 0;
      	for(int i =0; i<n; i++){
        	if(a[i] >= total/(4*m)){num += 1;}
        }
      if(num >= m){
      	System.out.println("Yes");
      }else{
      	System.out.println("No");
      }
          
    }
} public class Main{
	public static void main(String[] args){
    	Scanner scanner = new Scanner(System.in);
      	int n = scanner.nextInt();
      	double m = scanner.nextFloat();
      	int total = 0;
      	int[] a = new int[n];
      	for(int i =0; i<n; i++){
        	a[i] = scanner.nextInt();
          	total += a[i];
        }
      	int num = 0;
      	for(int i =0; i<n; i++){
        	if(a[i] >= total/(4*m)){num += 1;}
        }
      if(num >= m){
      	System.out.println("Yes");
      }else{
      	System.out.println("No");
      }
          
    }
} Main
import java.util.*;
public class Main{
	public static void main(String[] args){
    	Scanner scanner = new Scanner(System.in);
      	int n = scanner.nextInt();
      	double m = scanner.nextFloat();
      	int total = 0;
      	int[] a = new int[n];
      	for(int i =0; i<n; i++){
        	a[i] = scanner.nextInt();
          	total += a[i];
        }
      	int num = 0;
      	for(int i =0; i<n; i++){
        	if(a[i] >= total/(4*m)){num += 1;}
        }
      if(num >= m){
      	System.out.println("Yes");
      }else{
      	System.out.println("No");
      }
          
    }
}
