视频链接：E64树形DPP3174[HAOI2009]毛毛虫_哔哩哔哩_bilibili  P3174[HAOI2009]毛毛虫-洛谷|计算机科学教育新生态(luogu.com.cn)//树形DPO(n)#include<iostream>#include<cstring>#include<algorithm>usingnamespacestd;constintN=300005;int