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: Runtime Error)

import java.util.*;
 
public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
    	int c = sc.nextInt();
    	int k = sc.nextInt();
    	int i = 0;
    while(i<=k){
     if(a > b){
       b*=2;
       i++;
     }
     if(b > c){
       if(i>=k) break;
       c*=2;
       i++;
     }
      
    }
   
    if(b > a &&c > b){
		System.out.println("Yes");
      }else{
    System.out.println("No");
    }
 /*System.out.println(a);
     System.out.println(b);
     System.out.println(c);
    System.out.println(i);
     System.out.println(k); */
  }
}