一些很水的题目，不能再一分钟内写完的都是

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废物

Section 1. 水题小合集

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Problem Tried AC Difficulty
A2  子串查找 94 18 8
P3405  [USACO16DEC] Cities and States S 79 10 8
P5250  【深基17.例5】木材仓库 49 6 8
P5266  【深基17.例6】学籍管理 19 8 7
A1  「一本通 2.1 练习 7」门票 101 14 8
 
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