histcat

histcat

TODO

OI#

  1. Study the pd_ds library, then implement the mergeable heap maintenance for Day3T2

  2. Review the materials from days 1 to 3

  3. Depending on the situation, supplement with 3 or 4 problems daily

  4. Simplify combinations, $O(n)$ to calculate combinations

  5. BZOJ 3583

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