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>

int main(){

  int N;
  int max=0;
  int v=0;
  int *t;
  int i;

  scanf("%d",&N);


  for(i=0;i<N;i++){
    scanf("%d",&t[i]);
  }

  for(int i=0;i<N;i++){
  for(int j=0;j<N-1;j++){
    v=t[j+1]-t[i];
    if(v<0)
    v=-1*v;
    if(v>max)
    max=v;
  }
}
printf("%d",max);


}