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

ICPC 2024 南京区域赛（Nanjing Regional）部分题目的题解：
A. Hey, Have You Seen My Kangaroo?
B. Birthday Gift
C. Topology
E. Left Shifting 3
F. Subway
G. Binary Tree
I. Bingo
K. Strips
M. Ordainer of Inexorable Judgment

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