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: Wrong Answer)

#include<stdio.h>

int main (void)
{
    int n;

    scanf("%d", &n);

    if (400 <= n && 599 >= n) {
        printf("8級");
    }
    else if (600 <= n && 799 >= n) {
        printf("7級");
    }
    else if (800 <= n && 999 >= n) {
        printf("6級");
    }
    else if (1000 <= n && 1199 >= n) {
        printf("5級");
    }
    else if (1200 <= n && 1399 >= n) {
        printf("4級");
    }
    else if (1400 <= n && 1599 >= n) {
        printf("3級");
    }
    else if (1600 <= n && 1799 >= n) {
        printf("2級");
    }
    else if (1800 <= n && 1999 >= n) {
        printf("1級");
    }

    return 0;
}