Problem:
Score: 100 points

Problem Statement

M-kun is a competitor in AtCoder, whose highest rating is X.

In this site, a competitor is given a kyu (class) according to his/her highest rating. For ratings from 400 through 1999, the following kyus are given:

From 400 through 599: 8-kyu

From 600 through 799: 7-kyu

From 800 through 999: 6-kyu

From 1000 through 1199: 5-kyu

From 1200 through 1399: 4-kyu

From 1400 through 1599: 3-kyu

From 1600 through 1799: 2-kyu

From 1800 through 1999: 1-kyu

What kyu does M-kun have?

Constraints

400 \leq X \leq 1999

X is an integer.

Input

Input is given from Standard Input in the following format:

X

Output

Print the kyu M-kun has, as an integer.
For example, if he has 8-kyu, print 8.

Sample Input 1

725

Sample Output 1

7

M-kun's highest rating is 725, which corresponds to 7-kyu.

Thus, 7 is the correct output.

Sample Input 2

1600

Sample Output 2

2

M-kun's highest rating is 1600, which corresponds to 2-kyu.

Thus, 2 is the correct output.

Solution in Java (OpenJDK 11.0.6) (judge verdict: Wrong Answer)

import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        Main m = new Main(sc);
        m.show(m.solve());
        sc.close();
    }
    
	//フィールド
    Scanner sc;
    int X;
    
    //入力
    Main(Scanner sc) {
        this.sc = sc;
        this.X = sc.nextInt();
    }
    
    //解答処理
    private int solve() {
        int answer = 0;
        
        if (400 <= X && X <= 599) {
        	answer = 8;
        } else if (600 <= X && X <= 799) {
        	answer = 7;
        } else if (800 <= X && X <= 899) {
        	answer = 6;
        } else if (900 <= X && X <= 999) {
        	answer = 5;
        } else if (1000 <= X && X <= 1199) {
        	answer = 4;
        } else if (1200 <= X && X <= 1399) {
        	answer = 3;
        } else if (1600 <= X && X <= 1799) {
        	answer = 2;
        } else if (1800 <= X && X <= 1999) {
        	answer = 1;
        }
        
        return answer;
    }
    
    //出力
    public void show(int answer) {
        System.out.println(answer);
    }

}