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 (GCC 5.4.1) (judge verdict: Accepted)

#include <stdio.h>

int main()
{
    int n, i;
    scanf("%d", &n);

    int a[n];
    int min=0, max=0;

    scanf("%d", &a[0]);
    min = a[0];
    max = a[0];

    for(i=1; i<n; i++)
    {
        scanf("%d", &a[i]);
        if(a[i] < min)
        {
            min = a[i];
        }
        else if(a[i] > max)
        {
            max = a[i];
        }
    }
    printf("%d\n", max-min);

    return 0;
}