树剖这种又臭又长的东西没人看的（大雾
by 7KByte @ 2019-07-21 21:49:48
~~重构好啊~~
by DepletedPrism @ 2019-07-21 21:51:21
。。。
by _pzy_ @ 2019-07-21 21:54:14
估计您在$dfs1$求重儿子时已经出错。@[_pzy_](/space/show?uid=180516)
by chase_ @ 2019-07-21 22:11:52
~~如果没错当我没说~~
by chase_ @ 2019-07-21 22:13:41
@[ChaseNo1](/space/show?uid=172750)
是线段树写错了：
```cpp
if(l==r) {sum[l]=w[rev[l]];return;}
==>
if(l==r) {sum[rt]=w[rev[l]];return;}
```
by _pzy_ @ 2019-07-22 09:27:48