256 D: Multiplication Table

Правка en1, от Hand1e, 2015-10-13 08:56:34

I've been trying to solve this problem. I already read the editorial but it was too short for me to understand. Can anyone please explain how to solve this problem?

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en1 Английский Hand1e 2015-10-13 08:56:34 238 Initial revision (published)