ICPC 2019 World Finals（Codeforces Gym 102511）部分题目的题解：
A. Azulejos
B. Beautiful Bridges
D. Circular DNA
E. Dead-End Detector
G. First of Her Name
H. Hobsons' trains
J. Miniature Golf

ICPC 2021 World Finals（Codeforces Gym 104288）部分题目的题解：
B. Dungeon Crawler
C. Fair Division
F. Islands from the Sky
H. Prehistoric Programs
I. Spider Walk
J. Splitstream
L. Where Am I?

ICPC 2023 World Finals（Codeforces Gym 105255）部分题目的题解：
A. Riddle of the Sphinx
C. Three Kinds of Dice
D. Carl's Vacation
F. Tilting Tiles
H. Jet Lag

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

ICPC 2023 澳门区域赛（Macau Regional）（Codeforces Gym 104891）部分题目的题解：
A. (-1,1)-Sumplete
D. Graph of Maximum Degree 3
F. Land Trade