Codeforces Round 1008 (Div. 1) 部分题目的题解：
A. Breach of Faith
B. Finding OR Sum
C. Binary Subsequence Value Sum
D. Maximum Polygon
E. Another Folding Strip

Codeforces Round 1008 (Div. 1) 部分题目的题解：
A. Breach of Faith
B. Finding OR Sum
C. Binary Subsequence Value Sum
D. Maximum Polygon
E. Another Folding Strip

2025 华为数据通信高校程序设计竞赛训练营 Day 3 部分题目的题解：
A. Undercover
F. Competition
I. TianHe-IIA
K. Cards

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 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 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

ICPC 2024 成都区域赛（Nanjing Regional）部分题目的题解：
A. Arrow a Row
B. Athlete Welcome Ceremony
D. Closest Derangement
K. Magical Set

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 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