一些优化建图题

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洛谷团队里搬过来的

Section 1. 题目

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Problem Tried AC Difficulty
P8074  [COCI2009-2010#7] SVEMIR 2 2 4
P2403  [SDOI2010] 所驼门王的宝藏 2 2 5
P2632  Explorer 1 1 5
P5676  [GZOI2017] 小z玩游戏 2 2 4
P8207  [THUPC2022 初赛] 最小公倍树 2 2 5
P4366  [Code+#4] 最短路 3 2 5
 
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