Math

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

Input

The input contains a single integer a (-100 ≤ a ≤ 100).

Output

Output the result – an integer number.

Example

Input

1

Output

1

inputFormat

Input

The input contains a single integer a (-100 ≤ a ≤ 100).

outputFormat

Output

Output the result – an integer number.

Example

Input

1

Output

1

样例

1

1

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