2025年12月31日
codeforces 161D：Distance in Tree ← DFS + 树形DP
摘要： ​【题目来源】https://codeforces.com/problemset/problem/161/D【题目描述】A tree is a connected graph that doesn't contain any cycles.The distance between two verti 阅读全文
posted @ 2025-12-31 14:54 Triwa 阅读(17) 评论(0) 推荐(0)