Sequence Transformation CF题解|1454C Sequence Transformation 2023-12-07 Codeforces题解 信息奥赛 思维 Codeforces Ultra-Fast Mathematician CF题解|61A Ultra-Fast Mathematician 2023-12-07 Codeforces题解 信息奥赛 异或 Codeforces CF题解|Ternary XOR Codeforces题解|1328C Ternary XOR 2023-12-07 Codeforces题解 信息奥赛 思维 Codeforces CF题解|Maximum Product Codeforcefs题解|1406B Maximum Product 2023-12-07 Codeforces题解 信息奥赛 枚举 Codeforces CF|Building Permutation Codeforces题解|285C Building Permutation 2023-12-06 Codeforces题解 贪心 思维 Codeforces CF题解|Before an Exam CF题解|4B Before an Exam 2023-12-06 Codeforces题解 信息奥赛 思维 Codeforces 构造 CF题解|AccurateLee Codeforces题解|1369B AccurateLee 2023-12-06 Codeforces题解 信息奥赛 思维 Codeforces CF题解|Young Explorers CF题解|1355B Young Explorers 2023-12-06 Codeforces题解 信息奥赛 贪心 Codeforces CF题解|Challenging Cliffs Codeforces题解|1537C Challenging Cliffs 2023-12-05 Codeforces题解 信息奥赛 思维 Codeforces Alternating Subsequence CF题解|1343C Alternating Subsequence 2023-12-05 Codeforces题解 信息奥赛 思维 Codeforces CF题解|BerSU Ball Codeforces题解|489B BerSU Ball 2023-12-04 Codeforces题解 信息奥赛 贪心 Codeforces CF题解|Boats Competition CF题解|1399C Boats Competition 2023-12-04 Codeforces题解 思维 map Codeforces 双指针