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

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