视频链接： P2147[SDOI2008]洞穴勘测-洛谷|计算机科学教育新生态(luogu.com.cn)//线段树分治O(mlogmlogm)#include<iostream>#include<cstring>#include<algorithm>#include<vector>#include<map>usingnamespacestd;#definels(u<<1)