What should be the next step?

Правка en2, от 01011000000111000010, 2020-12-20 19:30:36

Hello everyone.I think you are well._Can you please help me?_

I have solved about 100 div2/div3 problem A.I have not enough idea how to solve problem B.How much time I should give to solve problem B? And which thing or problem solving techniques I must know?

---------------------------------------------------------------------------------------------------------- NB:I am a beginner.

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en2 Английский 01011000000111000010 2020-12-20 19:30:36 114
en1 Английский 01011000000111000010 2020-12-20 19:30:07 427 Initial revision (published)