The 3rd Universal Cup. Stage 1: St. Petersburg（暨 2024 LIX SPbSU Championship）部分题目的题解：
A. Element-Wise Comparison
C. Cherry Picking
D. Dwarfs' Bedtime
E. Fake Coin and Lying Scales
G. Unusual Case
J. First Billion
K. Tasks and Bugs
N. (Un)labeled graphs

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