How to learn from problems you were not able to solve in the contest

Правка en1, от Runtime_terror_, 2021-03-27 17:02:55

What to learn from a problem which you were not able to solve in a contest and the solution consists mostly of adhoc/non-trivial observations.

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en1 Английский Runtime_terror_ 2021-03-27 17:02:55 210 Initial revision (published)