Contest: Task: Related: TaskB

Score : $200$ points

We have a rectangular parallelepiped of size $A×B×C$, built with blocks of size $1×1×1$. Snuke will paint each of the $A×B×C$ blocks either red or blue, so that:

- There is at least one red block and at least one blue block.
- The union of all red blocks forms a rectangular parallelepiped.
- The union of all blue blocks forms a rectangular parallelepiped.

Snuke wants to minimize the difference between the number of red blocks and the number of blue blocks. Find the minimum possible difference.

- $2≤A,B,C≤10^9$

The input is given from Standard Input in the following format:

$A$ $B$ $C$

Print the minimum possible difference between the number of red blocks and the number of blue blocks.

3 3 3

9

For example, Snuke can paint the blocks as shown in the diagram below. There are $9$ red blocks and $18$ blue blocks, thus the difference is $9$.

2 2 4

0

For example, Snuke can paint the blocks as shown in the diagram below. There are $8$ red blocks and $8$ blue blocks, thus the difference is $0$.

5 3 5

15

For example, Snuke can paint the blocks as shown in the diagram below. There are $45$ red blocks and $30$ blue blocks, thus the difference is $9$.