Range of Numbers

Problem Description

Given $n$ and $n$ integers $a_i$, compute the range of these $n$ integers. The range means the difference between the maximum and the minimum of a set of numbers.

Input Format

The first line contains a positive integer $n$, the number of integers.

The second line contains $n$ integers $a_1, a_2, \dots, a_n$, separated by spaces.

Output Format

Output one integer: the range of these $n$ integers.

Sample Input

6
4 1 5 1 4 1

Sample Output

4

Sample Explanation

The $6$ input integers are $4, 1, 5, 1, 4, 1$. The maximum is $5$ and the minimum is $1$, so the range is $5 - 1 = 4$.

Constraints

$1 \le n \le 100$, $0 \le a_i \le 1000$.