Codeforces Round 1024 (Div. 1) 部分题目的题解：
A. Mex in the Grid
B. Quartet Swapping
C. 23 Kingdom
D. Mani and Segments
E. Kia Bakes a Cake

CCPC 2024 Final 部分题目的题解：
B. Add One 3 / 加一 3
C. Iridescent Universe / 彩虹色的宇宙
E. Omniscient Artist / 全知艺术家
F. Witnessing the Miracle / 见证奇迹
G. + and × with a sugar / +, × 与糖
H. Qingyu's Little Training Center / 小青鱼的训练中心
K. Grotesque Team Reconstruction / 怪诞组队法
L. Yearning for Yonder / 对远方的向往

Codeforces Round 1008 (Div. 1) 部分题目的题解：
A. Gellyfish and Flaming Peony
B. Gellyfish and Camellia Japonica
C. Gellyfish and Eternal Violet
D. Gellyfish and Forget-Me-Not

ICPC 2024 西南欧区域赛（Southwestern European Regional / SWERC 2024）部分题解：
B. Divine Gifting
C. Phryctoria
E. Building the Fort
F. Yaxchilán Maze
J. Recovering the Tablet
K. Disk Covering
L. The Charioteer

ICPC 2024 横滨区域赛（Yokohama Regional）部分题目的题解：
A. Ribbon on the Christmas Present
B. The Sparsest Number in Between
C. Omnes Viae Yokohamam Ducunt?
D. Tree Generators
E. E-Circuit Is Now on Sale!
F. The Farthest Point
G. Beyond the Former Explorer
I. Greatest of the Greatest Common Divisors

ICPC 2024 香港区域赛（Hong Kong Regional）部分题目的题解：
B. Defeat the Enemies
C. The Story of Emperor Bie
F. Money Game 2
G. Yelkrab
K. LRString
L. Flipping Paths

THUPC 2025 初赛部分题目的题解：
A. 骑行计划
B. 挑战大模型
C. Harmful Machine Learning
D. 摊位分配
E. 背向而行
H. waht 先生的法阵
I. 乒乓球赛
K. 峰回路转
L. 检查站

CCPC 2024 哈尔滨区域赛（Harbin Regional）部分题目的题解：
A. Build a Computer
B. Concave Hull
D. A Simple String Problem
E. Marble Race
G. Welcome to Join the Online Meeting!
I. A Brand New Geometric Problem
J. New Energy Vehicle
K. Farm Management
L. A Game On Tree

ICPC 2018 World Finals（Codeforces Gym 102482）部分题目的题解：
A. Catch the Plane
B. Comma Sprinkler
E. Getting a Jump on Crime
H. Single Cut of Failure
I. Triangles

CCPC 2023 Final 部分题目的题解：
A. Add One 2
C. Colorful Graph 2
D. Min or Max
G. China Convex Polygon Contest
H. The Game
J. DFS Order 5
K. Sticks