### maxdifference

### 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 ≤ N ≤ 100`
`1 ≤ A`_{i} ≤ 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