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
FAST_IO = 1
if FAST_IO:
    import io, sys, atexit
    rr = iter(sys.stdin.read().splitlines()).next
    sys.stdout = _OUTPUT_BUFFER = io.BytesIO()

    @atexit.register
    def write():
        sys.__stdout__.write(_OUTPUT_BUFFER.getvalue())
else:
    rr = raw_input
rri = lambda: int(rr())
rrm = lambda: map(int, rr().split())
rrmm = lambda n: [rrm() for _ in xrange(n)]
n = rri()
if 400<=n<=599:
    print(8)
if 600<=n<=799:
    print(7)
if 800<=n<=999:
    print(6)
if 1000<=n<=1199:
    print(5)
if 1200<=n<=1399:
    print(4)
if 1400<= n<=1599:
    print(3)
if 1600<=n<=1799:
    print(2)
if 1800<=n<=1999:
    print(1)