Need help with CHEFBRO

Here’s the Problem

Went through the editorial, it said something like grundy theorem and all which I didn’t follow.

Tell me some possible approach or a dummy solution.

I havent still solved this question, so i cant help in solution, but you mentioned that -

like grundy theorem and all which I didn't follow.

I think you can go through these links if you have problem understanding them-

Written

Video-

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I’ll try to understand the theory from the links you gave, thanks

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similar problem is explained in this book

hope this helps

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Thanks for the book ^^

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