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Problems

Opposite number

Opposite number

Read one integer and print the opposite integer.

Input

One integer n, no more than 1018 by absolute value.

Output

Print the opposite integer.

Time limit 1 second
Memory limit 128 MiB
Input example #1
10
Output example #1
-10
Author Matviychuk Sergiy Volodymyrovych
Source "ABC programming"