[懒标记](https://oiwiki.org/ds/seg/#%E8%BF%87%E7%A8%8B_2)
by Qcfff @ 2023-12-28 18:11:03
没看懂，建议先把线段树搞明白
by RailgunZzzz @ 2023-12-28 18:12:29
@[Qcfff](/user/354055) 谢谢，此贴结
by only_joker @ 2023-12-28 18:12:49