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(){
  int a[101] = {};
  int N = 0;
  int i;
  scanf("%d",&N);
  for(i = 0;i < N;i++){
    scanf("%d",&a[i]);
    if(a[i] < 0) a[i] *= -1;
    if(a[i] > a[0]) a[0] = a[i];
    if(a[i] < a[1]) a[1] = a[i];
  }
  printf("%d",a[0] - a[1]);
  return 0;
}