#P1133C. Balanced Team

Balanced Team

Description

You are a coach at your local university. There are nn students under your supervision, the programming skill of the ii-th student is aia_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 55.

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

The first line of the input contains one integer nn (1n21051 \le n \le 2 \cdot 10^5) — the number of students.

The second line of the input contains nn integers a1,a2,,ana_1, a_2, \dots, a_n (1ai1091 \le a_i \le 10^9), where aia_i is a programming skill of the ii-th student.

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

Input

The first line of the input contains one integer nn (1n21051 \le n \le 2 \cdot 10^5) — the number of students.

The second line of the input contains nn integers a1,a2,,ana_1, a_2, \dots, a_n (1ai1091 \le a_i \le 10^9), where aia_i is a programming skill of the ii-th student.

Output

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

Sample Input 1

6
1 10 17 12 15 2

Sample Output 1

3

Sample Input 2

10
1337 1337 1337 1337 1337 1337 1337 1337 1337 1337

Sample Output 2

10

Sample Input 3

6
1 1000 10000 10 100 1000000000

Sample Output 3

1

Note

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