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: Accepted)

// inputに入力データ全体が入る
function Main(input) {

    input = input.split("\n");
  
    let n = parseInt(input[0], 10);
    
    let ary = [[400, 599, 8], [600, 799, 7], [800, 999, 6], [1000, 1199, 5], 
                [1200, 1399, 4], [1400, 1599, 3], [1600, 1799, 2], [1800, 1999, 1]];

    let rslt = 0;

    for (let i=0;i<ary.length;i++) {
        if (ary[i][0] <= n && n <= ary[i][1]) {
            rslt = ary[i][2];
        }
    }

    console.log('%d', rslt);
}


Main(require("fs").readFileSync("/dev/stdin", "utf8"));