Greetings Codeforces community!

This is a small learning resource to help understand segment trees through visualisation.

Segment trees are usually taught using recursive code and diagrams. Even though this is enough to write the implementation, many learners still find it hard to understand how queries and updates actually move through the tree.

I built a small project to make this easier by showing each segment tree operation step by step using visualisations.

Link: https://segment-tree-visualization.vercel.app/

Note: Image quality is reduced due to Codeforces image compression.

The tool visualises a standard segment tree and supports:

• Build operation
• Range queries
• Point updates
• Range updates using lazy propagation
• SUM / MIN / MAX segment tree variants

Additional features:

• Step-by-step execution
• Adjustable animation speed
• Download the current tree visualisation as a PNG image

The site also includes short explanation pages for:

• Segment Tree fundamentals
• Segment Tree with Lazy Propagation

This resource is intended for learning, revision, debugging boundary logic, and teaching with visual aids.

Notes and Contributions

This project is based on my personal understanding of segment trees. If you find any issues or incorrect behaviour, please report them or leave a comment, and I will try to fix them.

The GitHub repository is open for collaboration, especially for UI/UX improvements.

If you find this resource helpful, consider upvoting the post so it can reach more learners.