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.

Constraints

* 2≤A,B,C≤10^9

Input

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


A B C


Output

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

Examples

Input

3 3 3


Output

9


Input

2 2 4


Output

0


Input

5 3 5


Output

15
import java.util.Scanner;

public class Main {
	static Scanner in = new Scanner(System.in);

	public static void main(String[] args) {
		long a = in.nextLong(), b = in.nextLong(), c = in.nextLong();
		if(a % 2 ==0 || b % 2 ==0 || c % 2 ==0 ){
			System.out.println("0");
		}else{
			long ans = a * b;
			ans = Math.min(ans, a * c);
			ans = Math.min(ans, b * c);
			System.out.println(ans);
		}
	}
}
