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 Go (1.6) (judge verdict: Accepted)

package main

import (
	"fmt"
	//"sort"
	//"strconv"
)
func min(c int64,b int64) int64{
	if c>b{
		return c;
	}else{
		return b;
	}
}
func abs(c int64) int64{
	if c<0{
		c*=-1;
	}
	return c;
}
func main(){
	var n,i,j int64;
	fmt.Scan(&n);

	a := []int64{};
	for i=0;i<n;i++{
		var k int64;
		fmt.Scan(&k);
		a = append(a,k);
	}
	var ans int64;
	ans = abs(a[0]-a[1]);
	for i = 0; i < n; i++ {
		for j = 0; j < n; j++ {
			if i==j{continue;}
			ans = min(ans,abs(a[i]-a[j]))
		}
	}
	fmt.Println(ans)
}