标签:ref return http turn 题目 href cli open ret
https://www.cnblogs.com/chinhhh/p/7965433.html
题目https://www.luogu.com.cn/problem/P3384
P3384 【模板】重链剖分
原文地址:https://www.cnblogs.com/xcfxcf/p/12401472.html