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09-20

2020牛客暑期多校训练营（第九场）H.Groundhog Speaking Groundhogish

08-15

2019ICPC南京网络赛C. Tsy's number 5

06-01

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05-08

CF954I Yet Another String Matching Problem

04-30

CF632E Thief in a Shop

04-29

CF1334G Substring Search

04-27

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04-26

P3321 [SDOI2015]序列统计

04-24

P4238 多项式求逆

04-24