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: Accepted)

#include <bits/stdc++.h>
#include <unordered_map>
#define ull unsigned long long
#define int long long
#define ll long long
#define fr(i, n) for (int i = 0; i < n; i++)
#define frf(i, j, n) for (int i = j; i <= n; i++)
#define frd(i, n) for (int i = n; i >= 0; i--)
#define mp(i, j) make_pair(i, j)
#define pb(x) push_back(x)
using namespace std;
// typedef vector<vector<ll>> matrix;
// const ll PRIME = 1e9 + 7;
// typedef pair<int,pair<int,int> >  ppi;
void solve()
{
   int n;
   cin>>n;
   if(n<600)
   {cout<<8;return;}
   else if(n<800)
   {
       cout<<7;
       return;
   }
   else if(n<1000)
   {
       cout<<6;
       return;
   }
   else if(n<1200)
   {
       cout<<5;
       return;
   }
   else if(n<1400)
    {
        cout<<4;
        return;
    }
    else if(n<1600)
    {
        cout<<3;
        return;
    }
    else if(n<1800)
    {
        cout<<2;
        return;
    }
    else
    {
        cout<<1;
    }
    
    
}
int32_t main()
{

    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
#ifndef ONLINE_JUDGE
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#endif

    int t;
    // cin >> t;
    t = 1;
    while (t--)
    {

        solve();
    }
}