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**Task** | Statistics

Time limit: | 1.00 s | Memory limit: | 512 MB |

There are $n$ sticks with some lengths. Your task is to modify the sticks so that each stick has the same length.

You can either lengthen and shorten each stick. Both operations cost $x$ where $x$ is the difference between the new and original length.

What is the minimum total cost?

The first input line contains an integer $n$: the number of sticks.

Then there are $n$ integers: $p_1,p_2,\ldots,p_n$: the lengths of the sticks.

Print one integer: the minimum total cost.

- $1 \le n \le 5 \cdot 10^5$

- $1 \le p_i \le 10^9$

Input:

`5`

2 3 1 5 2

Output:

`5`