Problems

# Play hockey this...

# Play hockey this...

Forest residents have decided to hold a hockey tournament between the N teams. How many ways can be distributed sets of gold, silver and bronze medals, if one prize may take only one team?

**Input**

In a single line located a unique natural number **N**, does not exceed **100**.

**Output**

Single number - the required number of ways.

Input example

17

Output example

4080