#Lutece0420. lili‘s number
lili‘s number
Migrated from Lutece 420 lili‘s number
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Description
Once upon a time,there's a boy whose name is lili.He likes to create many wonderful things.One day, he happens to come to a beautiful garden.There he picks many pretty little stones.Again,his heart tells him that he should use them to create some incredible things!So he decides to put them in a line of boxes,each box has at most one stone,just as the road which he used to walk on in his childhood.But again,he wants to make his works different.So he wants no two adjacent boxes to have stones both.He wonders how many ways that stones be put into boxes.Can you help him to finish his great work?
Input
multiple cases:
- ()the number of the boxes
Output
The number described above MOD
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Samples
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Resources
5th BUPT Programming Contest Preliminary