@[MLBZSSK](/user/333800) 虽然但是,这题树状数组很好写
by Imiya @ 2022-09-30 21:06:32
```cpp
return (l<=R) && (L<=l);
```
by dxy2020 @ 2022-09-30 21:08:33
@[yuanjiabao](/user/455558) 主要就是练练线段树的
by qip101 @ 2022-09-30 21:08:44
@[dxy2020](/user/366254) 那个InRange和OutofRange没问题啊
by qip101 @ 2022-09-30 21:10:19
@[dxy2020](/user/366254) ??????
by qip101 @ 2022-09-30 21:16:08
```cpp
pushdown(u,L,R);
update(u*2,L,M,l,r);
update(u*2+1,M+1,R,l,r);
```
这里吧
by dxy2020 @ 2022-09-30 21:18:26
@[MLBZSSK](/user/333800) 发错code了嘛 这题不是维护异或嘛 而且inrange写错了吧
by L_cm_C5H6 @ 2022-09-30 21:36:13