Ehab and another construction problem

1000ms

262144K

Description:

Given an integer $$$x$$$, find 2 integers $$$a$$$ and $$$b$$$ such that:

$$$1 \le a,b \le x$$$
$$$b$$$ divides $$$a$$$ ($$$a$$$ is divisible by $$$b$$$).
$$$a \cdot b>x$$$.
$$$\frac{a}{b}<x$$$.

Input:

The only line contains the integer $$$x$$$ $$$(1 \le x \le 100)$$$.

Output:

You should output two integers $$$a$$$ and $$$b$$$, satisfying the given conditions, separated by a space. If no pair of integers satisfy the conditions above, print "-1" (without quotes).

Sample Input:

Sample Output:

6 3

Sample Input:

Sample Output:

-1

Informação

Provedor Codeforces

Código CF1088A