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>
#include<stdlib.h>

int fnc1(int *,int);
int fnc2(int *,int);


int main(){
    int *a;
    int i,n,ans;
    scanf("%d",&n);
    for(i=0; i<n; i++){
        scanf("%d",&a[i]);
    }

    ans=fnc1(a,n)-fnc2(a,n);
    printf("%d\n",ans);
    return 0;
}
 
int fnc1(int *a,int n){
    int i,max;
    max=a[0];
    for(i=1; i<n; i++){
        if(max<a[i]){
            max=a[i];
        }
    }
    return max;
}
int fnc2(int *a,int n){
    int i,min;
    min=a[0];
    for(i=1; i<n; i++){
        if(min>a[i]){
            min=a[i];
        }
    }
    return min;
}