已解决，希望能给wa的人一点提示，
扫描线排序时除了按X排外还要排权值
by Goldia @ 2019-08-27 18:33:19
@[Littlegoldenfish](/space/show?uid=132952) 蟹蟹
by chdy @ 2019-09-02 07:15:59
树状数组不好么？？？
by jiqimao @ 2019-10-30 17:00:40
算了树状数组不行,线段树不好么？？
by jiqimao @ 2019-10-30 17:01:33
谢谢您
by lxhcaicai @ 2020-04-04 00:04:32
谢谢
by Bug_maker @ 2020-04-07 12:44:45
@[Goldia](/user/132952) 谢谢，但想问一下：为什么要按权值排啊qaq
by __OccDreamer__ @ 2020-08-08 13:35:13
@[Diwanul](/user/190926) 因为应该优先枚举删除的边，所以要把权值为负的边排在前面吧
by 查无此人 @ 2020-08-20 19:58:27
@[查无此人](/user/88583) 蟹蟹！没有想到负数……
~~id好评~~
by __OccDreamer__ @ 2020-08-20 20:07:06
谢谢！
by ql12345 @ 2020-10-25 16:56:48