CSE11 · CSE foundations & data structures
Ticket Queue
A railway ticket counter serves people in order. Enqueue and dequeue, then add a priority lane.
🎯 You will learn to
- Enqueue and dequeue
- See first-in first-out
- Compare a priority queue
🧪 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
🗺️ Ticket counter queues
People join at the tail and are served from the head; a priority lane is served first.
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
When is a priority queue fairer than a plain queue, and when is it unfair?
🛡️ 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