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() {
	int n, a[100], max, min, i;
	if (scanf("%d", &n) == 0) return 1;
	for (i = 0; i < n; i++) if (scanf("%d", &a[i]) == 0) return 1;
	max = 0; min = 1000000000;
	for (i = 0; i < n; i++) {
		if (max < a[i]) max = a[i];
		if (min > a[i]) min = a[i];
	}
	printf("%d", max - min);
	return 0;
}