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`.

Examples

Input

725


Output

7


Input

1600


Output

2
import sys
input = lambda : sys.stdin.readline().rstrip()

x = int(input())

if 400 <= x <= 599:
    out = 8
elif 600 <= x <= 799:
    out = 7
elif 800 <= x <= 999:
    out = 6
elif 1000 <= x <= 1199:
    out = 5
elif 1200 <= x <= 1399:
    out = 4
elif 1400 <= x <= 1599:
    out = 3
elif 1600 <= x <= 1799:
    out = 2
elif 1800 <= x <= 1999:
    out = 1

print(out)