Codeforces Hello 2025

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Problems AC Note
A. MEX Table
B. Gorilla and the Exam
C. Trip to the Olympiad
D. Gifts Order 线段树
E1. Another Exercise on Graphs (Easy Version) 二分
E2. Another Exercise on Graphs (hard version) 并查集
F. Formation
G. Secret Message
H. Coffee Break
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Good Bye 2024: 2025 is NEAR

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Problems AC Note
A. Tender Carpenter
B. Outstanding Impressionist
C. Bewitching Stargazer
D. Refined Product Optimality 交换
E. Resourceful Caterpillar Sequence game、树上计数
F. Earnest Matrix Complement
G. Naive String Splits
H. Delicate Anti-monotonous Operations
I1. Affectionate Arrays (Easy Version)
I2. Affectionate Arrays (Hard Version)
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Codeforces Global Round 28

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Problems AC Note
A. Kevin and Combination Lock
B. Kevin and Permutation
C. Kevin and Binary Strings
D. Kevin and Competition Memories
E. Kevin and Bipartite Graph 二分图、构造
F. Kevin and Math Class 笛卡尔树、树形 DP
G. Kevin and Matrices
H. Kevin and Strange Operation
I1. Kevin and Puzzle (Easy Version)
I2. Kevin and Puzzle (Hard Version)
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VP 2024 CCPC 重庆

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Problems AC Note
A. 乘积,欧拉函数,求和 欧拉函数、根号分治
B. osu!mania 卡精度
C. 连方 构造
D. 有限小数 数论、不定方程
E. 合成大西瓜 思维
F. Pico Park
G. 魔弹
H. str(list(s))
I. 算术 简单题
J. 骰子 简单题
K. 小 C 的神秘图形 简单题
L. 沙堆
M. Median Replacement
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