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Learn CS Fundamentals
in 5 Days

Arrays, trees, graphs. Sorting that makes sense. Dynamic programming without the confusion.

5 lessons
Self-paced
~60 min/day
Free forever
No account needed
Start Day 1 — Free → See what's covered
What you'll learn

Data Structures & Algorithms

Free 5-day data structures and algorithms course. Arrays, trees, graphs, sorting, and dynamic programming with clear explanations and real code.

  • Understand Big O notation and analyze code complexity intuitively
  • Master arrays, stacks, queues, linked lists, and hash maps
  • Traverse and search binary trees and graphs (BFS, DFS)
  • Implement and understand the most important sorting algorithms
  • Solve dynamic programming problems with memoization
  • Know which data structure to reach for in any situation
O(n)
complexity
5
topics
5
lessons
$0
cost
5-Day Curriculum

Every lesson has a real exercise.
No theory without practice.

01
Arrays, Stacks & Hash Maps
Big O notation, arrays, stacks, queues, hash maps with code
Big Ohash mapstack
→
02
Trees & Recursion
Binary trees, BST, tree traversal, recursion patterns
binary treeBSTDFS/BFS
→
03
Graphs
Graph representations, BFS, DFS, shortest path algorithms
adjacency listBFSDijkstra
→
04
Sorting & Searching
Merge sort, quicksort, binary search explained with code
merge sortquicksortbinary search
→
05
Dynamic Programming
Memoization, tabulation, classic DP problems solved step by step
memoizationtabulationFibonacci
→
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Your instructor
B
Bo Peng
Founder, Precision AI Academy

Kaggle Top 200 data scientist. Trained 400+ professionals across universities and federal agencies. Built production systems at scale. This course is practical first — every lesson has code you can run and an exercise you can finish in under an hour.

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