hello codeforces. some days ago i meet great problem — 1285F - Classical?. in this task we need to use the Mobius function. so. for me it was something new and interesting. could u give me some task, were i can also use that trick?
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hello codeforces. some days ago i meet great problem — 1285F - Classical?. in this task we need to use the Mobius function. so. for me it was something new and interesting. could u give me some task, were i can also use that trick?
hello could u pls give me tasks on heavy-light decomposition
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