The following languages are additionally available for the problems from the contest

April Fools Day Contest 2021:

- Secret 2021

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F. Math

time limit per test

1 secondmemory limit per test

256 megabytesinput

standard inputoutput

standard output*The two images are equivalent, feel free to use either one.

Input

The input contains a single integer $$$a$$$ ($$$-100 \le a \le 100$$$).

Output

Output the result – an integer number.

Example

Input

1

Output

1

Codeforces (c) Copyright 2010-2021 Mike Mirzayanov

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