Open Data Structures

opendatastructures.org ↗

Implement and analyse practical data structures

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SI Score: 75/100
Pricing: Free AI reading, not confirmed
Free plan: Yes AI reading, not confirmed
Sign-up required: Not confirmed

Java data-structures cpp algorithms

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Answers use saved listing facts and recorded sources.

What it does

Open Data Structures explains structures such as lists, dictionaries, trees, heaps and graphs with Java and C++ implementations.

Study one representation and its analysis together. Comparing a structure's interface with its implementation helps explain why different choices have different costs. Run a small implementation before moving to a more sophisticated tree or graph representation. The book and accompanying Java/C++ source are free. The site identifies a Creative Commons Attribution licence for both; check the linked terms when reusing an implementation or explanation.

Sources

Open Data Structures (Oct 26, 2026)

SI Score

75/100

#25 in Learn to Code

Based on published information. No hands-on task test.

Method 2.0 · Published source review Assessed Oct 26, 2026Score ceiling for this evidence: 84/100.

Product usefulness 75

Evidence

Data-structure interfaces are paired with Java/C++ implementations and running-time analysis, documenting concrete code and analytical inputs/outputs.

Limits: AI review of saved source passages. No hands-on test, human approval or automatic-provider checker receipt.

Source links and check dates are in Sources and checks below.

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Sources and checks

Supporting pages for product usefulness, site facts, prices and separate website checks. Each record keeps its own date. Reading a page does not establish how well the product performs in use.

opendatastructures.org/
- PricingAI reading, not confirmedChecked Oct 26, 2026
  The official page explicitly says the book and accompanying source code are free, both libre and gratis.
- Free planAI reading, not confirmedChecked Oct 26, 2026
  The official page explicitly offers the book and code free.
- Product usefulness evidenceChecked Oct 26, 2026

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