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 data

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

## Output data

Single number - the required number of ways.

## Examples

Input example #1

17

Output example #1

4080