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 C++ (GCC 9.2.1) (judge verdict: Wrong Answer)

#include <bits/stdc++.h>
using namespace std;

int main()
{
 int x;
  cin>>x;
  if(400<=x && 599<=x)
  {
    cout<<8<<endl;
  }
  else if(600<=x && 799<=x)
  {
    cout<<7<<endl;
  }
  else if(800<=x && 999<=x)
  {
    cout<<6<<endl;
  }
  else if(1000<=x && 1199<=x)
  {
    cout<<5<<endl;
  }
  else if(1200<=x && 1399<=x)
  {
    cout<<4<<endl;
  }
  else if(1400<=x && 1599<=x)
  {
    cout<<3<<endl;
  }
  else if(1600<=x && 1799<=x)
  {
    cout<<2<<endl;
  }
  if(1800<=x && 1999<=x)
  {
    cout<<1<<endl;
  }
  
}