Angles of Polygon

Time Limit: 1 sec

 

The Problem

We know that, sum of all the angles in a triangle is 180 degree and sum of all the angles in a rectangle is 360 degree. 

Now, what is the sum of all the angles of a polygon which has N sides?

 

The Input

Input contains a single integer N (3≤ N ≤10⁶) per line till the end of file(EOF).

 

The Output

Print a single integer for every line of input, the sum of all the angles of a polygon which has N sides in a separate line.

 

Sample Input

3

4

 

Sample Output

180

360

 

 

 

[College Level]

1st Online Programming Contest 2016 by Outsbook

Problem Setter: Fahim Abrar