Problem:
Score : 200 points

Problem Statement

It is only six months until Christmas, and AtCoDeer the reindeer is now planning his travel to deliver gifts.

There are N houses along TopCoDeer street. The i-th house is located at coordinate a_i. He has decided to deliver gifts to all these houses.

Find the minimum distance to be traveled when AtCoDeer can start and end his travel at any positions.

Constraints

1 ≤ N ≤ 100

0 ≤ a_i ≤ 1000

a_i is an integer.

Input

Input is given from Standard Input in the following format:

N
a_1 a_2 ... a_N

Output

Print the minimum distance to be traveled.

Sample Input 1

4
2 3 7 9

Sample Output 1

7

The travel distance of 7 can be achieved by starting at coordinate 9 and traveling straight to coordinate 2.

It is not possible to do with a travel distance of less than 7, and thus 7 is the minimum distance to be traveled.

Sample Input 2

8
3 1 4 1 5 9 2 6

Sample Output 2

8

There may be more than one house at a position.

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


use std::io;
use std::cmp;

fn main() {
    let mut line = String::new();
    io::stdin().read_line(&mut line);
    let N = line.trim().parse::<usize>().unwrap();
    
    let mut line = String::new();
    io::stdin().read_line(&mut line);
    let mut line = line.split_whitespace();
    let mut a = Vec::<usize>::with_capacity(N);
    for i in 0..N {
        let n = line.next().unwrap().parse::<usize>().unwrap();
        a.push(n);
    }

    let mut max = std::usize::MIN;
    let mut min = std::usize::MAX;
    for i in 0..N {
        max = cmp::max(max, a[i]);
        min = cmp::min(min, a[i]);
    }

    let ans = max - min;
    println!("{}", ans);
}