Tsinghua Bootcamp 2025 预选赛部分题目的题解：

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 EC Final 部分题目的题解：
A. Hitoshizuku
E. Corrupted Scoreboard Log
F. Boolean Function Reconstruction
G. Collatz Conjecture
H. Staircase Museum
I. Color-Balanced Tree
K. Exploration Boundary

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?