import java.util.Scanner;
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 all = 0;
    for(int i=0; i<n; i++){
        a[i] = sc.nextInt();
        all += a[i];
    }
    int cou = 0;
    for(int i=0; i<n; i++){
        if(a[i] >= (double)all/(4*m)) {
        	cou++;
        }
    }
       if(cou>=m) {
    	   System.out.println("Yes");
       }else {
    	   System.out.println("No");
       }
    }
} import java.util.Scanner; Scanner 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 all = 0;
    for(int i=0; i<n; i++){
        a[i] = sc.nextInt();
        all += a[i];
    }
    int cou = 0;
    for(int i=0; i<n; i++){
        if(a[i] >= (double)all/(4*m)) {
        	cou++;
        }
    }
       if(cou>=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 all = 0;
    for(int i=0; i<n; i++){
        a[i] = sc.nextInt();
        all += a[i];
    }
    int cou = 0;
    for(int i=0; i<n; i++){
        if(a[i] >= (double)all/(4*m)) {
        	cou++;
        }
    }
       if(cou>=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 all = 0;
    for(int i=0; i<n; i++){
        a[i] = sc.nextInt();
        all += a[i];
    }
    int cou = 0;
    for(int i=0; i<n; i++){
        if(a[i] >= (double)all/(4*m)) {
        	cou++;
        }
    }
       if(cou>=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 all = 0; all 0 for(int i=0; i<n; i++){
        a[i] = sc.nextInt();
        all += a[i];
    } int i=0; int i=0; i 0 i<n i n i++ i++ i {
        a[i] = sc.nextInt();
        all += a[i];
    } {
        a[i] = sc.nextInt();
        all += a[i];
    } a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc all += a[i] all a[i] a i int cou = 0; cou 0 for(int i=0; i<n; i++){
        if(a[i] >= (double)all/(4*m)) {
        	cou++;
        }
    } int i=0; int i=0; i 0 i<n i n i++ i++ i {
        if(a[i] >= (double)all/(4*m)) {
        	cou++;
        }
    } {
        if(a[i] >= (double)all/(4*m)) {
        	cou++;
        }
    } if(a[i] >= (double)all/(4*m)) {
        	cou++;
        } a[i] >= (double)all/(4*m) a[i] a i (double)all/(4*m) (double)all (4*m) 4 m {
        	cou++;
        } cou++ cou if(cou>=m) {
    	   System.out.println("Yes");
       }else {
    	   System.out.println("No");
       } cou>=m cou 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 sc = new Scanner(System.in);
    int n = sc.nextInt();
    int m = sc.nextInt();
    int[]a = new int[n];
 
    int all = 0;
    for(int i=0; i<n; i++){
        a[i] = sc.nextInt();
        all += a[i];
    }
    int cou = 0;
    for(int i=0; i<n; i++){
        if(a[i] >= (double)all/(4*m)) {
        	cou++;
        }
    }
       if(cou>=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 all = 0;
    for(int i=0; i<n; i++){
        a[i] = sc.nextInt();
        all += a[i];
    }
    int cou = 0;
    for(int i=0; i<n; i++){
        if(a[i] >= (double)all/(4*m)) {
        	cou++;
        }
    }
       if(cou>=m) {
    	   System.out.println("Yes");
       }else {
    	   System.out.println("No");
       }
    }
} Main
import java.util.Scanner;
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 all = 0;
    for(int i=0; i<n; i++){
        a[i] = sc.nextInt();
        all += a[i];
    }
    int cou = 0;
    for(int i=0; i<n; i++){
        if(a[i] >= (double)all/(4*m)) {
        	cou++;
        }
    }
       if(cou>=m) {
    	   System.out.println("Yes");
       }else {
    	   System.out.println("No");
       }
    }
}
