Homework Introduction
树状数组+ST表+线段树+LCA
去掉了关闭提交的题目，希望大家能做完。
Problem
Please claim the assignment to see the problems.
- Status
- Live...
- Problem
- 20
- Open Since
- 2025-9-28 12:15
- Deadline
- 2025-11-29 23:59
- Extension
- 24 hour(s)
树状数组+ST表+线段树+LCA
去掉了关闭提交的题目，希望大家能做完。