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: Wrong Answer)

#include <stdio.h>

int main(void){
    int N,i,j,tmp,min,max,sub,maxsub;
    scanf("%d",&N);
    int A[N];
    for(i = 0;i < N;i++){
        scanf("%d",&A[i]);
        //printf("%d \n",A[i]);
    }

    min = A[0];
    max = A[0];

    for(i = 0;i <= N;i++){
        if(A[i] > max){
            max = A[i];
        }else if(A[i] < min){
            min = A[i];
        }
    }
    printf("max:%d,min:%d\n",max,min);
    maxsub = max - min;
    printf("%d\n",maxsub);
}