Problem:
Score : 100 points

Problem Statement

Given an integer N not less than 3, find the sum of the interior angles of a regular polygon with N sides.

Print the answer in degrees, but do not print units.

Constraints

3 \leq N \leq 100

Input

Input is given from Standard Input in the following format:

N

Output

Print an integer representing the sum of the interior angles of a regular polygon with N sides.

Sample Input 1

3

Sample Output 1

180

The sum of the interior angles of a regular triangle is 180 degrees.

Sample Input 2

100

Sample Output 2

17640

Solution in C# (Mono 4.6.2.0) (judge verdict: Wrong Answer)

using System;
using System.Collections.Generic;
using System.Text;
namespace ac2
{
    class Program
    {


        static void Main(string[] args)
        {
            string[] input = Console.ReadLine().Split(' ');
            string str = "o";
            string b = "x";
            int k = str.Length;
            int j = b.Length;
            
            if (15 - j >= 8 )
            {
                Console.Write("YES");
            }
            else
            {
                Console.Write("NO");
            }
        }
    }
}