Difference Calculation

Background

Congcong has recently been learning about numerical operations. He encountered an interesting problem that requires calculating the difference between a given integer and a specific number, and doubling it under certain conditions.

Problem Description

Given an integer $n$, return the absolute difference between $n$ and $21$. However, if $n$ is over $21$, return double the absolute difference.

Input Format

Input is given from standard input in the following format.

$n$

Output Format

Output is printed to standard output in the following format.

The calculated result

Sample

19

2

10

11

21

0

Sample Explanation

Sample 1: $n=19$. $19$ is not greater than $21$, so return $|19 - 21| = |-2| = 2$. Sample 2: $n=10$. $10$ is not greater than $21$, so return $|10 - 21| = |-11| = 11$. Sample 3: $n=21$. $21$ is not greater than $21$, so return $|21 - 21| = |0| = 0$.

Constraints

Time limit is $1$ second, and memory limit is $1024$ KiB for each test case.