@[小虎编程](/user/545873)
```cpp
tr[y].l = merge(x, tr[x].l);
```
```cpp
split(x, key - 1, x, y);
```
by UYHW @ 2023-11-03 23:15:19
@[UYHW](/user/252567)
请问这个是改哪里
by 小虎编程 @ 2023-11-03 23:24:12
@[小虎编程](/user/545873) 第一个是在merge里，应该改为 `tr[y].l = merge(x, tr[y].l);`，第二个是del第二行
by UYHW @ 2023-11-03 23:27:40
谢谢大佬
by 小虎编程 @ 2023-11-03 23:32:41