@[lunjiahao](/user/779970) 似乎是 modify 最后的查询有问题，应当为
```cpp
ans+=query(1,1,n,w[v],w[u]);
```
by UMS2 @ 2024-02-28 22:17:13
不是这
by UMS2 @ 2024-02-28 22:18:05
@[UMS2](/user/730828)
呃呃呃改了这里还是WA……
by lunjiahao @ 2024-02-29 09:53:54
@[UMS2](/user/730828)
嗯嗯调出来了
modify上面的`if(u==v) return ans;` 删掉就好了
谢谢
by lunjiahao @ 2024-02-29 09:56:59
@[lunjiahao](/user/779970) 把 modify 类型改成 long long
by UMS2 @ 2024-02-29 10:05:58
ans 也得改，极限能到 $1\times10^{11}$.
by UMS2 @ 2024-02-29 10:08:07
@[UMS2](/user/730828)
define改了
已过谢谢
by lunjiahao @ 2024-02-29 10:08:25