# 21. Shortest Paths

- [21.1 Introduction](/cs61b-textbook-spring-2026/21.-shortest-paths/21.1-introduction.md)
- [21.2 Dijkstra's Algorithm](/cs61b-textbook-spring-2026/21.-shortest-paths/21.2-dijkstras-algorithm.md)
- [21.3 A\* Algorithm](/cs61b-textbook-spring-2026/21.-shortest-paths/21.3-a-algorithm.md)
- [21.4 Summary](/cs61b-textbook-spring-2026/21.-shortest-paths/21.4-summary.md)
- [21.5 Exercises](/cs61b-textbook-spring-2026/21.-shortest-paths/21.5-exercises.md)