About learn from codeforces !!

Правка en1, от YosiefAhmed, 2022-07-31 00:33:21

How i can learn from such as this problem 1705D - Mark and Lightbulbs

I need help.

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en1 Английский YosiefAhmed 2022-07-31 00:33:21 103 Initial revision (published)