Cuboid layers
This is the most difficult problem so far? Based on the number of solve, it is. Solved only by less than 2000 after seven years. You cannot name it a simple problem.
I hate this problem. I had a very hard time when I was trying to solve this problem the first time. I spent quite some time to figure out how many blocks needed for each layer. Then my life was much easier.
I read the discussion. I was surprised so many people do not want to take a little bit time to optimize their code. If your code runs more than a second, something is wrong! Mine only need less than 50 ms.
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