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: Runtime Error)

#include<stdio.h>
#include<limits.h>
int main(){
  int n,i,j;
  int a[INT_MAX];
  int b,c;

  scanf("%d", &n);
  for(i=0;i<n;i++)
    scanf("%d", a[i]);

  c=0;

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