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 C++14 (GCC 5.4.1) (judge verdict: Accepted)

//abc123 b 最後に注文するものを決める
#include <iostream>
#include <bits/stdc++.h>
#include <string>
#include <math.h>
#include <vector>
#include <algorithm>
using namespace std;

int main(){
    int n; cin>>n;
    int ans=0;
    int a[n];
    for(int i=0;i<n;i++) cin>>a[i];
    for(int i=0;i<n;i++){
        for(int j=i+1;j<n;j++){
            ans=max(ans,abs(a[j]-a[i]));
        }
    }
    cout<<ans<<endl;
    return 0;
}