Relation between ABC and ARC

Правка en2, от Qualified, 2020-11-20 20:19:37

What is the relation between ABC's and ARC's. Like ARC's problem A is idk ABC's problem D. Help is appreciated.

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en2 Английский Qualified 2020-11-20 20:19:37 16
en1 Английский Qualified 2020-11-20 17:36:46 123 Initial revision (published)