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セグメント木や累積和に GCD や LCM を載せる #152

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kmyk opened this issue Aug 5, 2021 · 3 comments · Fixed by #163
Closed

セグメント木や累積和に GCD や LCM を載せる #152

kmyk opened this issue Aug 5, 2021 · 3 comments · Fixed by #163
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enhancement New feature or request good first issue Good for newcomers

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@kmyk
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kmyk commented Aug 5, 2021

いまは半群として (ℤ, +), (ℤ, min), (ℤ, max) しか使ってないけれど、gcd, lcm もほしい
特に <O(N), O(1)> GCD を貼れるとなんだかうれしい
@kmyk kmyk added enhancement New feature or request good first issue Good for newcomers labels Aug 5, 2021
@hotman78
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hotman78 commented Aug 5, 2021

segment tree についてgcdは償却計算量となるのでそこまでうれしくはなさそうです、別のデータ構造として追加するのはとても賛成です

@hotman78
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hotman78 commented Aug 6, 2021 •
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LCMに関してはオーバーフローが大きな問題になりそうですね...

@hotman78
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hotman78 commented Aug 6, 2021

LCMに関してはオーバーフローが大きな問題になりそうですね...

とりあえずこの問題は無視して作ります

@hotman78 hotman78 mentioned this issue Aug 6, 2021
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@kmyk kmyk closed this as completed in #163 Aug 7, 2021
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feat(core): add gcd/lcm Semigroup to segment tree hotman78/Jikka
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@kmyk @hotman78