Help in Div1 B. Alternating Current

Правка en1, от adzo261, 2020-01-24 19:11:13

Can anyone help me with how to approach this problem?
I am completely blank on how to proceed.
I tried reading the editorial but couldn't understand it.

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Теги div1, #help, div1b

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en1 Английский adzo261 2020-01-24 19:11:13 266 Initial revision (published)