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(void)
{
    long int n,a[100],max,min,i,s,tmp;
    scanf("%ld",&n);
    for(i=0;i<n;i++)
        scanf("%ld",&a[i]);
    max=a[0]; min=a[1];
    for(i=0;i<n;i++){
        if(max<a[i]){
            tmp=max; max=a[i]; a[i]=tmp;
        }
        if(min>a[i]){
            tmp=min; min=a[i]; a[i]=tmp;
        }
    }
    s=max-min;
    printf("%ld\n",s);
    return 0;
}