Problem: You are a coach at your local university. There are n students under your supervision, the programming skill of the i-th student is a_i.

You have to create a team for a new programming competition. As you know, the more students some team has the more probable its victory is! So you have to create a team with the maximum number of students. But you also know that a team should be balanced. It means that the programming skill of each pair of students in a created team should differ by no more than 5.

Your task is to report the maximum possible number of students in a balanced team.

Input

The first line of the input contains one integer n (1 ≤ n ≤ 2 ⋅ 10^5) — the number of students.

The second line of the input contains n integers a_1, a_2, ..., a_n (1 ≤ a_i ≤ 10^9), where a_i is a programming skill of the i-th student.

Output

Print one integer — the maximum possible number of students in a balanced team.

Examples

Input


6
1 10 17 12 15 2


Output


3


Input


10
1337 1337 1337 1337 1337 1337 1337 1337 1337 1337


Output


10


Input


6
1 1000 10000 10 100 1000000000


Output


1

Note

In the first example you can create a team with skills [12, 17, 15].

In the second example you can take all students in a team because their programming skills are equal.

In the third example you can create a team consisting of a single student (and you cannot create a team consisting of at least two students).

Solution (in JAVA):

Solution:
import java.util.*;
public class MyClass {
    public static void main(String args[]) {
     Scanner sc = new Scanner(System.in);
     int n=sc.nextInt();
     int arr[]=new int[n];
     for(int i=0;i<n;i++){
         arr[i]=sc.nextInt();
     }
     Map<Integer , Integer  > map = new HashMap<>();
     for(int k : arr ) {
         map.put( k , map.getOrDefault(k , 0 )+1 );
     }
     int max=0;
     for(int num : arr ){
         int temp=0 ;
         for(int i=num ; i<=num+5; i++){
             if(map.containsKey(i) ) temp+=map.get(i);
         }
         max=Math.max(temp , max );
     }
     System.out.print(max);
     
    }
}