Recently, I found a problem. No matter how hard，I onlt can solve one problem in Div2.How can I solve the second problem?Even the third problem?How can help me?If you can help me,please post your thoughts in the comments section below.Thanks.
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solve div2 B, C problems.
I am hard to do it.But I can't do it!
there is this interesting trend called reading an editorial. residents here say it's like black magic — like reading the thoughts of the gods.
I don't know what's your mean?
i mean read editorials when you can't solve problems
OK.Thank you.