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> 
using namespace std; 
#define ll long long 
#define sort(v) sort(v.begin(),v.end()) 
#define pb push_back
/*ll ar[1000000+9]={0}; 
void seiv() { 
ll n=1000000,i,j; 
ar[1]=1; 
for(i=4;i<=n;i+=2)ar[i]=1; 
for(i=3;i<=n;i+=2) 
{ if(ar[i]==0) 
{ for(j=i*i;j<=n;j+=i*2)ar[j]=1; }
 } 
*/
int main()
{
    
    ll a,b,c,d,e,i;
    cin>>a;
  if(a>=400&&a<=599)cout<<8<<endl;
if(a>=600&&a<=799)cout<<7<<endl;
if(a>=800&&a<=999)cout<<6<<endl;
if(a>=1000&&a<=1199)cout<<5<<endl;
    if(a>=1200&&a<=1399)cout<<4<<endl;
if(a>=1400&&a<=1599)cout<<3<<endl;
if(a>=1600&&a<=1799)cout<<2<<endl;
if(a>=1800&&a<=1999)cout<<1<<endl;



}