OI#
1.pd_ds 库的学习，然后实现 Day3T2 的可并堆维护
2. 复习 1—3 天的课件
3. 看情况补每天的 3、4 题
4. 组合数化简，$O (n)$ 求组合数
1.BZOJ 3583
TODO
AI-generated summary
The content outlines a to-do list focused on studying and practicing for competitive programming. Key tasks include learning the pd_ds library and implementing a specific problem, reviewing materials from the first three days of study, completing daily problem sets, and simplifying combinatorial calculations to achieve an O(n) solution. Additionally, it mentions a specific problem (BZOJ 3583) to work on.