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>
#include<math.h>
#include<stdlib.h>
#define rep(index,num) for(int index=0;index<num;index++)
#define eps 1e-15
typedef long long ll;
int main(){
	int N,A,Amax=0,Amin=2e+9;
	scanf("%d",&N);
	rep(i,N){
		scanf("%d",&A);
		if(A>Amax) Amax=A;
		if(A<Amin) Amin=A;
	}
	printf("%d\n",Amax-Amin);
	return 0;
}