20260517 Code learning

Git Repo Setting & Codex setting

1. Fork the repository
2. clone the repository in git bash

git clone [your github repo URL]

Push to your github (in main branch)

git add .
git commit -m "message whatever you want" 
git push origin main 

Problem Solving

1. Stirling numbers of the second kind & Catalan numbers
2. Dijkstra's algorithm
3. Cube Solving
4. Line Segment Intersection
5. Modular Inverse