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: Wrong Answer)

#include<stdio.h>
int main(void)
{
  int  i=0, j, b, ans, n;
  int a[i];
  scanf("%d", &n);

  for (i=0; i<n; ++i){
    scanf("%d", &a[i]);
  }
  for (i=0; i<n; i++) {
    for (j=i+1; j<n; ++j){
      if (a[i] > a[j]){
        b = a[i];
        a[i] = a[j];
        a[j] = b;
      }
    }
  }
    ans=a[n-1]-a[0];
    printf("%d", ans);
  return 0;
}