Solved: xiaoxiaobaozi

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• 2219B1

  Quality: 3,597 global accepts · Tags: binary search, constructive algorithms, divide and conquer, interactive, math · first AC: Apr 13, 2026 · C++23 (GCC 14-64, msys2) (first AC)

  xiaoxiaobaozi's solution

  —· N/A
• 2219B2

  Quality: 3,204 global accepts · Tags: binary search, bitmasks, constructive algorithms, interactive · first AC: Apr 13, 2026 · C++23 (GCC 14-64, msys2) (first AC)

  xiaoxiaobaozi's solution

  —· N/A
• 2219A

  Quality: 8,977 global accepts · Tags: brute force, constructive algorithms, math, number theory · first AC: Apr 13, 2026 · C++23 (GCC 14-64, msys2) (first AC)

  xiaoxiaobaozi's solution

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