Problem:
Score : 200 points

Problem Statement

You are given an integer sequence A of length N.
Find the maximum absolute difference of two elements (with different indices) in A.

Constraints

2 \leq N \leq 100

1 \leq A_i \leq 10^9

All values in input are integers.

Input

Input is given from Standard Input in the following format:

N
A_1 A_2 ... A_N

Output

Print the maximum absolute difference of two elements (with different indices) in A.

Sample Input 1

4
1 4 6 3

Sample Output 1

5

The maximum absolute difference of two elements is A_3-A_1=6-1=5.

Sample Input 2

2
1000000000 1

Sample Output 2

999999999

Sample Input 3

5
1 1 1 1 1

Sample Output 3

0

Solution in Rust (1.15.1) (judge verdict: Accepted)

use std::io::Read;

fn main() {
    let mut buff = String::new();
    std::io::stdin().read_to_string(&mut buff).unwrap();
    let mut iter = buff.split_whitespace();

    let n: usize = iter.next().unwrap().parse().unwrap();
    let mut a = Vec::new();

    for _i in 0..n {
        let x: i32 = iter.next().unwrap().parse().unwrap();
        a.push(x);
    }

    a.sort();
    println!("{}", a.last().unwrap() - a.first().unwrap());

    ()
}