codeforces#P1505F. Math
Math
Description
*The two images are equivalent, feel free to use either one.
The input contains a single integer $a$ ($-100 \le a \le 100$).
Output the result – an integer number.
Input
The input contains a single integer $a$ ($-100 \le a \le 100$).
Output
Output the result – an integer number.
Samples
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