10474: ABC102 —— A - Multiple of 2 and N
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Description
You are given a positive integer $N$. Find the minimum positive integer divisible by both $2$ and $N$.
Input
Input is given from Standard Input in the following format:
```
$N$
```
```
$N$
```
Output
Print the minimum positive integer divisible by both $2$ and $N$.
Constraints
- $1 \leq N \leq 10^9$
- All values in input are integers.
- All values in input are integers.
Sample 1 Input
3
Sample 1 Output
6
6 is divisible by both 2 and 3. Also, there is no positive integer less than 6 that is divisible by both 2 and 3. Thus, the answer is 6.
Sample 2 Input
10
Sample 2 Output
10
Sample 3 Input
999999999
Sample 3 Output
1999999998