Problem:
Score : 100 points

Problem Statement

Snuke has a favorite restaurant.

The price of any meal served at the restaurant is 800 yen (the currency of Japan), and each time a customer orders 15 meals, the restaurant pays 200 yen back to the customer.

So far, Snuke has ordered N meals at the restaurant.
Let the amount of money Snuke has paid to the restaurant be x yen, and let the amount of money the restaurant has paid back to Snuke be y yen.
Find x-y.

Constraints

1 ≤ N ≤ 100

Input

The input is given from Standard Input in the following format:

N

Output

Print the answer.

Sample Input 1

20

Sample Output 1

15800

So far, Snuke has paid 16000 yen, and the restaurant has paid back 200 yen. Thus, the answer is 15800.

Sample Input 2

60

Sample Output 2

47200

Snuke has paid 48000 yen for 60 meals, and the restaurant has paid back 800 yen.

Solution in Java8 (OpenJDK 1.8.0) (judge verdict: Accepted)

import java.io.PrintWriter;
import java.util.Scanner;

public class Main {
    static private Scanner scan = new Scanner(System.in);
    public static void main(String args[]) {
        int int1 = Integer.parseInt(scan.next());
//        int int2 = Integer.parseInt(scan.next());
//        int int3 = Integer.parseInt(scan.next());
//        String temp_str1 = "";
//        String temp_str2 = "";
        int temp_int1 = 0;
//        String str1 = scan.next();
//        String str2 = scan.next();
//        String str3 = scan.next();
        int ans_int = 0;
        String ans = "";
//        double ans_dob = 0;
        ans_int = int1*800 - int1/15*200;
        PrintWriter out = new PrintWriter(System.out);
        out.println(ans_int);
        out.flush();
        scan.close();
    }
}