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 JavaScript (Node.js 12.16.1) (judge verdict: Wrong Answer)

// parameter "input" gets all data
function Main(data) {
  	let input = Number(data)
	if(input>=400 || input<=599){
    	console.log(8)
    }else if(input>=600 || input<=799){
    	console.log(7)
	}else if(input>=800 || input<=999){
    	console.log(6)
	}else if(input>=1000 || input<=1199){
    	console.log(5)
	}else if(input>=1200 || input<=1399){
    	console.log(4)
	}else if(input>=1400 || input<=1599){
    	console.log(3)
	}else if(input>=1600 || input<=1799){
    	console.log(2)
	}else if(input>=1800 || input<=1999){
    	console.log(1)
	}
}
// Don't edit this line!
Main(require("fs").readFileSync("/dev/stdin", "utf8"));