@[__QL__](/space/show?uid=108402) 这里写反了吧，直接就$\text{return}$了呀
```cpp
if(l <= x and y <= r) return maxx[k];
```
by hongzy @ 2019-01-22 08:41:29
@[hongzy](/space/show?uid=20375)
已AC,谢谢dalao
by __QL__ @ 2019-01-22 09:20:17
还有一个错误:
`Query_max`的
```cpp
if(mid >= l)
if(mid < r)
```
应该写成
```cpp
if(mid >= x)
if(mid < y)
```
by __QL__ @ 2019-01-22 09:22:59