2024年5月29日
E. Chain Queries
摘要： E. Chain Queries You are given a tree of $n$ vertices numbered from $1$ to $n$. Initially, all vertices are colored white or black. You are asked to p 阅读全文
posted @ 2024-05-29 21:27 onlyblues 阅读(37) 评论(0) 推荐(0) 编辑
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