// "static void main" must be defined in a public class.
import java.util.*;
public class Main {
    public static void main(String[] args) {
       Scanner sc = new Scanner(System.in);
        int x = sc.nextInt();
        int y = sc.nextInt();
        int[] a = new int[x];
        int c=0;
        for(int i=0;i<x;i++){
            a[i] = sc.nextInt();
            c=c+a[i];
        }
        int count=0;
        for(int j=0;j<a.length;j++){
            if((a[j]*4*y)>=c){count++;}
            if(count==y){System.out.println("Yes");return;}
        }
        
        
        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 x = sc.nextInt();
        int y = sc.nextInt();
        int[] a = new int[x];
        int c=0;
        for(int i=0;i<x;i++){
            a[i] = sc.nextInt();
            c=c+a[i];
        }
        int count=0;
        for(int j=0;j<a.length;j++){
            if((a[j]*4*y)>=c){count++;}
            if(count==y){System.out.println("Yes");return;}
        }
        
        
        System.out.println("No");
    }
} Main public static void main(String[] args) {
       Scanner sc = new Scanner(System.in);
        int x = sc.nextInt();
        int y = sc.nextInt();
        int[] a = new int[x];
        int c=0;
        for(int i=0;i<x;i++){
            a[i] = sc.nextInt();
            c=c+a[i];
        }
        int count=0;
        for(int j=0;j<a.length;j++){
            if((a[j]*4*y)>=c){count++;}
            if(count==y){System.out.println("Yes");return;}
        }
        
        
        System.out.println("No");
    } main {
       Scanner sc = new Scanner(System.in);
        int x = sc.nextInt();
        int y = sc.nextInt();
        int[] a = new int[x];
        int c=0;
        for(int i=0;i<x;i++){
            a[i] = sc.nextInt();
            c=c+a[i];
        }
        int count=0;
        for(int j=0;j<a.length;j++){
            if((a[j]*4*y)>=c){count++;}
            if(count==y){System.out.println("Yes");return;}
        }
        
        
        System.out.println("No");
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int x = sc.nextInt(); x sc.nextInt() sc.nextInt sc int y = sc.nextInt(); y sc.nextInt() sc.nextInt sc int[] a = new int[x]; a new int[x] x int c=0; c 0 for(int i=0;i<x;i++){
            a[i] = sc.nextInt();
            c=c+a[i];
        } int i=0; int i=0; i 0 i<x i x i++ i++ i {
            a[i] = sc.nextInt();
            c=c+a[i];
        } {
            a[i] = sc.nextInt();
            c=c+a[i];
        } a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc c=c+a[i] c c+a[i] c a[i] a i int count=0; count 0 for(int j=0;j<a.length;j++){
            if((a[j]*4*y)>=c){count++;}
            if(count==y){System.out.println("Yes");return;}
        } int j=0; int j=0; j 0 j<a.length j a.length a a.length j++ j++ j {
            if((a[j]*4*y)>=c){count++;}
            if(count==y){System.out.println("Yes");return;}
        } {
            if((a[j]*4*y)>=c){count++;}
            if(count==y){System.out.println("Yes");return;}
        } if((a[j]*4*y)>=c){count++;} (a[j]*4*y)>=c (a[j]*4*y) a[j]*4*y a[j] a j 4 y c {count++;} count++ count if(count==y){System.out.println("Yes");return;} count==y count y {System.out.println("Yes");return;} System.out.println("Yes") System.out.println System.out System System.out "Yes" return; 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 x = sc.nextInt();
        int y = sc.nextInt();
        int[] a = new int[x];
        int c=0;
        for(int i=0;i<x;i++){
            a[i] = sc.nextInt();
            c=c+a[i];
        }
        int count=0;
        for(int j=0;j<a.length;j++){
            if((a[j]*4*y)>=c){count++;}
            if(count==y){System.out.println("Yes");return;}
        }
        
        
        System.out.println("No");
    }
} public class Main {
    public static void main(String[] args) {
       Scanner sc = new Scanner(System.in);
        int x = sc.nextInt();
        int y = sc.nextInt();
        int[] a = new int[x];
        int c=0;
        for(int i=0;i<x;i++){
            a[i] = sc.nextInt();
            c=c+a[i];
        }
        int count=0;
        for(int j=0;j<a.length;j++){
            if((a[j]*4*y)>=c){count++;}
            if(count==y){System.out.println("Yes");return;}
        }
        
        
        System.out.println("No");
    }
} Main
// "static void main" must be defined in a public class.
import java.util.*;
public class Main {
    public static void main(String[] args) {
       Scanner sc = new Scanner(System.in);
        int x = sc.nextInt();
        int y = sc.nextInt();
        int[] a = new int[x];
        int c=0;
        for(int i=0;i<x;i++){
            a[i] = sc.nextInt();
            c=c+a[i];
        }
        int count=0;
        for(int j=0;j<a.length;j++){
            if((a[j]*4*y)>=c){count++;}
            if(count==y){System.out.println("Yes");return;}
        }
        
        
        System.out.println("No");
    }
}
