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;

fn main() {
    let mut n = String::new();
    io::stdin().read_line(&mut n).expect("Failed to read line.");
    
    let mut line = String::new();
    io::stdin().read_line(&mut line).expect("Failed to read line.");
    let nums = line.trim().split(' ').flat_map(str::parse::<u32>).collect::<Vec<_>>();

    let mut min = 1000000000;
    let mut max = 0;
    for a in nums {
        if a > max {
            max = a;
        }
        if a <= min {
            min = a;
        }
    }
    println!("{}", max - min);
}