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#00015E

Kangaroo

Kangaroo is in coordinate origin (at the (0,0)). For 1 second he jumps for 1 Up, Down, Left or Right.



InputThe standard input contains one number N (0 <= N < 2<sup>32</sup>-1), representing the number of seconds.


OutputOn standard output write one number that represent on how many different points kangaroo can be after exactly [N] seconds.



Input:
1
Output:
4



Input:
1234
Output:
1525225

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