DSAHelper: Data-Structures

My LeetCode profile is linked here. In it, you'll find that I started on May 18, 2025, I'm in at-least the top 10% rank-wise (500,000/5,000,000+) in under 2 weeks, I solved 235 questions(as well as several more complex ones if the Time-Limit Exceeding error didn't happen for them lol), and more relevant info.

This GitHub repository contains code in all 5 programming-languages that I'm fluent in: C#, Java, PHP, Python, & TypeScript(which is just JavaScript with Types). This specific branch contains the implementation of various types of data-structures, and this repository's wiki contains key-details on many of those data-structures.

There is a total of 51 data-structures that I'm well-versed in and that I believe are essential for software-engineers to know, not only for coding technical-interviews, but also for optimizing their code and approach to the thousands of problems they're tasked to solve. Here is that list of data-stuctures(whatever's in bold will be implemented code-wise in this repo, whatever's in italics will be explained in this repo's wiki. some may be bold and italicized; some may be just one; some may be neither)-

1. Arrays

2. Lists

3. Matrices

4. Dictionaries

5. Regular Sets

6. Disjoint-Sets (Python)

7. Singly Linked Lists

8. Doubly Linked Lists

9. Circular Linked Lists

10. Doubly Circular Linked Lists (TypeScript)

11. Multilevel Linked Lists

12. Skip-Lists (PHP)

13. Regular Stacks

14. Monotonic Stacks

15. Simple Queues

16. Circular queues

17. Priority queues

18. Double-ended queues (Deques)

19. Monotonic Queues

20. Full Binary Trees

21. Degenerate Binary Trees

22. Skewed Binary Trees

23. Complete Binary Trees

24. Perfect Binary Trees

25. Balanced Binary Trees

26. Binary Search Trees

27. Heap Trees (Java)

28. Segment Trees (C#)

29. AVL Trees

30. Red-Black Trees (Python)

31. B-Trees

32. B+ Trees

33. Tries (PHP)

34. Directed Graph

35. Undirected Graph

36. Null Graph

37. Simple Graph

38. Trivial Graph

39. Complete Graph

40. Cyclic Graph

41. Acyclic Graph

42. Connected Graph

43. Disconnected Graph

44. Regular Graph

45. Finite Graph

46. Infinite Graph

47. Pseudo Graphs

48. Bipartite Graphs

49. Planar Graphs

50. Multi Graphs

51. Euler Graphs

If you're wondering why some of them aren't covered fully(or even at all) in this repo, it's because I already know them to a sufficient extent and adding them to the repo wouldn't provide as much value.

Besides the learning and reviewing of critical data-structures, this branch serves two core purposes: to showcase to potential job-recruiters and employers my level of expertise in this field, as well as how seriously I take my craft.