CSE12 · CSE foundations & data structures
Linked List Builder
Build a singly linked list of train coaches: add, find and remove coaches by following next pointers.
🎯 You will learn to
- Create nodes with next pointers
- Insert and delete
- Walk the list
🧪 Live environment
Runs entirely in your browser: nothing is installed, no real cloud account is used and your code is never sent to our server.
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✅ Steps & checkpoints
🗺️ Linked list of coaches
Each node holds a value and a pointer to the next; the head is the only entry point and None ends the list.
The 2D diagram shows the exact flow, ports and trust boundaries. The 3D scene is a concept view of the same parts; packets travel along the same arrows.
🤔 Think about it
Why is removing the first coach easier than removing the last one?
🛡️ Safety & cost
Simulations and in-browser runtimes only.
🧹 Cleanup
Nothing to clean up.
📚 Reference documents
- Introduction to Algorithms (6.006) · MIT OpenCourseWare
- The Python Tutorial · Python
- SQL as understood by SQLite · SQLite
- Linux man pages · man7.org
Official sources, checked on 5 Nov 2026. Cloud services change often; check the official page before relying on a feature. All references