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 (Clang 3.8.0) (judge verdict: Wrong Answer)

#include <iostream>

using namespace std;

int N;
int A[100];

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