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 Go (1.14.1) (judge verdict: Accepted)

package main

import "fmt"

var x int

func main() {
	an := 0
	fmt.Scanf("%d", &x)
	if a(400, 599) {
		an = 8
	} else if a(600, 799) {
		an = 7
	} else if a(800, 999) {
		an = 6
	} else if a(1000, 1199) {
		an = 5
	} else if a(1200, 1399) {
		an = 4
	} else if a(1400, 1599) {
		an = 3
	} else if a(1600, 1799) {
		an = 2
	} else if a(1800, 1999) {
		an = 1
	}
	fmt.Println(an)
}
func a(i, j int) bool {
	if i <= x && x <= j {
		return true
	}
	return false
}