algorithms-data-structures

Repo for holding all algorithm and data structure problems from leetcode, hackerrank, etc.

Good Sources

• https://www.youtube.com/c/BackToBackSWE/videos
  • Solid tutorials on algorithms. Also pretty energetic which helps staying engaged.
• https://www.geeksforgeeks.org/
  • Great site with tutorials on pretty much everything
• https://www.youtube.com/channel/UCMn3_305DqmTylxJPFA8OJA
  • Does all the daily challenges
• BigO Cheat Sheet
  • List of common algorithms and their BigO time/space complexity
• Competitive programmer's handbook
  • Goes into different algorithms/techniques you should know as a competitive programmer
• Junior competitive programmer training sheet
  • Roadmap for becoming a competitve programmer

Data Structures

Graphs

• Traversal
  • DFS and BFS

Trees

Binary Tree

• Traversal
  • Level Order
  • Pre/Post/In Order

Tidbits

• String builder is faster than string concat
• Leetcode uses kotlin JS which is why it's so slow

Dynamic Programming (AKA BANE OF MY EXISTENCE)

I don't have a really good resource for this. There's good examples and intro out there. But trying to apply it in practice confuses the absolute hell out of me.

• (Hackerrank Intro)[https://www.youtube.com/watch?v=P8Xa2BitN3I]
• (Coin Change)[https://www.youtube.com/watch?v=1R0_7HqNaW0]

Profiles

Way more active on leetcode since that had a bigger problem set of easys :D also supported kotlin before hackerrank.

• Leetcode
• Hackerrank