```c++
tree[i].l<=x<=mid
```
注意 C 中没有连续比较的写法。
by reveal @ 2023-02-07 14:31:37
@[_Minecraft12345](/user/452438) 您一人两个马蜂是吧
```cpp
if(x <= mid) ans += getsum(x, mid, k * 2);
if(y > mid) ans += getsum(mid+1, y, k * 2 + 1);
```
这是什么大杂烩？
by yinhee @ 2023-02-07 14:34:03
@[reveal](/user/523491) ...好的我调过了，谢谢大佬awa
by _Minecraft12345 @ 2023-02-07 14:36:51
@[yinhee](/user/578590) 这是我同学帮我调的....
by _Minecraft12345 @ 2023-02-07 14:45:21