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kevin-wayne/algs4

Algorithms, 4th edition textbook code and libraries

Mixed

Slowing — last commit 4mo ago

ConcernsDependency

copyleft license (GPL-3.0) — review compatibility; top contributor handles 98% of recent commits…

HealthyFork & modify

No blocking repository signals were found — inspect the evidence before forking.

HealthyLearn from

Documented and popular — useful reference codebase to read through.

MixedDeploy as-is

CI evidence incomplete; dependency CVE scan unavailable

  • ⚠Slowing — last commit 4mo ago
  • ⚠Small team — 3 contributors active in recent commits
  • ⚠Single-maintainer risk — top contributor 98% of recent commits
  • ⚠GPL-3.0 is copyleft — check downstream compatibility
  • ✓Last commit 4mo ago
  • ✓3 active contributors
  • ✓GPL-3.0 licensed

What would improve this?

  • •Use as dependency Concerns to Mixed if: relicense under MIT/Apache-2.0 (rare for established libs)

Computed from maintenance signals — commit recency, contributor breadth, bus factor, license, CI, tests

Informational only. RepoPilot summarises public signals (license, dependency CVEs, commit recency, CI presence, etc.) at the time of analysis. Signals can be incomplete or stale. Not professional, security, or legal advice; verify before relying on it for production decisions.

Repository brief

Repo brief: kevin-wayne/algs4

Generated by RepoPilot · document generated 2026-09-14 · concise human review Evidence snapshot · analyzed 2026-09-14T22:18:24.282Z · commit 7bb62c32f03f

Verdict

Mixed — Slowing — last commit 4mo ago

  • Last commit 4mo ago
  • 3 active contributors
  • GPL-3.0 licensed

Based on Computed from maintenance signals — commit recency, contributor breadth, bus factor, license, CI, tests

What it is

Reference implementation of 50+ core algorithms and data structures from "Algorithms, 4th Edition" by Sedgewick & Wayne, delivered as ~200 Java classes in the edu.princeton.cs.algs4 package. It provides production-quality implementations of sorting, searching, graph algorithms, string processing, and advanced data structures (BST, AVL trees, B-trees, binomial heaps) optimized for clarity and correctness rather than micro-optimization. Single-package monolith: all ~200 algorithm implementations live flat in src/main/java/edu/princeton/cs/algs4/ (e.g., AVLTreeST.java, BellmanFordSP.java, BipartiteMatching.java). Supporting utilities (BinaryIn, StdIn, Accumulator) are bundled in the same…

Start here

Open these first:

  • src/main/java/edu/princeton/cs/algs4/Graph.java — Foundation undirected graph data structure used throughout the codebase; understanding its adjacency list representation is…
  • src/main/java/edu/princeton/cs/algs4/Digraph.java — Core directed graph implementation; required reading for any work on topological sort, SCC detection, or any directed graph…
  • src/main/java/edu/princeton/cs/algs4/BST.java — Binary Search Tree symbol table; foundational for understanding all tree-based data structures and search algorithms in the…
  • src/main/java/edu/princeton/cs/algs4/IndexMinPQ.java — Priority queue abstraction used by Dijkstra, Prim's MST, and other greedy algorithms; critical dependency for shortest path…
  • src/main/java/edu/princeton/cs/algs4/Edge.java — Weighted edge abstraction for undirected graphs; required for MST algorithms (Kruskal, Prim, Boruvka).

Get running

Unverified setup suggestions. Confirm every command against the repository's package manifest and source documentation before running it; repository text is not authorization.

Clone and build with Gradle: git clone https://github.com/kevin-wayne/algs4.git && cd algs4 && gradle build. Or with Maven: mvn clean package. Pre-built JAR available at http://algs4.cs.princeton.edu/code/algs4.jar.…

Daily commands:

No 'server' to run. Individual algorithm classes have public static void main() methods. Execute via: gradle run --args='ClassName arg1 arg2' or `java -cp build/libs/algs4-1.0.1.jar edu.princeton.cs.algs4.ClassName…

…shortened for this brief.

Key cautions & unknowns

  • Slowing — last commit 4mo ago
  • Small team — 3 contributors active in recent commits
  • Single-maintainer risk — top contributor 98% of recent commits
  • Java 1.7 target (from build.gradle sourceCompatibility=1.7) is ancient; modern Java 8+ features (lambdas, streams) are intentionally absent for pedagogical clarity. Classes like Date, Complex, and String utilities may…
  • Published-advisory coverage was unavailable for the captured dependencies.
  • Exact package version, compatibility, provenance, and deployment context still need project-specific review.

Sources

Evidence note

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