题单

Cut and Add

差分 dfn序

Quiz Competition: Qualifiers

New but Nostalgic Problem

trie树，链式前向星

Diameter Endpoint Colors

树的直径

Tree Orientation (Easy Version)

偏序关系，哈斯图

Tree Orientation (Hard Version)

Sheep Eat Wolves

posted @ 2026-09-26 17:40  thenrify  阅读(8)  评论(0)    收藏  举报
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