The Product

Code, learned like a story.

Every hard idea in CS — recursion, graphs, hashing, dynamic programming — is taught as a six-minute animated story you'll actually remember a week later. Not slides. Not lectures. Stories.

The CodeStory pressVol. 6

Table of contents

01The Postman of the Sorted Kingdombinary search ✓

02The Wedding Planner's Ledgerhash maps ✓

03The Courier's Shortest Routereading now

04The Time-Travelling Accountantdynamic prog.

Each story ends inrunnable code + a mock question

Act I88 stories · 6 modules · one arc
WHY STORY

You don't forget a story. You forget a slide.

Memory is built around narrative. Ask anyone what Binary Search is, and they'll quote a textbook. Ask them about the postman of the Sorted Kingdom hunting for house number 73, and they'll tell you the whole algorithm — including the edge case where lo crosses hi. That's the bet CodeStory is built on, and that's what every lesson on this page is.

60+ stories. 500+ concepts. One curriculum.

A sample of the catalog. Each story ends with code, a real-interview problem, and an AI mock asking you to explain it out loud.

BS
Binary Search
The Sorted Kingdom
12 minBeginner
RC
Recursion
The Mirror Maze of Hanoi
14 minBeginner
GR
Graphs & BFS
Riya's Mumbai local map
18 minIntermediate
HM
Hash Maps
The Library That Always Knew
11 minBeginner
DP
Dynamic Programming
The Tailor and the Stash
22 minAdvanced
TR
Trees & Traversals
The Family Tree of the Maurya
16 minIntermediate
SR
Sorting
The Auction House
13 minBeginner
ST
Stacks & Queues
The Chai Counter at Howrah Station
10 minBeginner

Anatomy of a story-lesson.

01
Cold open

A character has a problem. No code. No keywords. Just a situation you've been in.

02
The idea, animated

We show the algorithm visually — pointers move, halves get tossed, the search shrinks. The idea before the syntax.

03
Code, line-by-line

Now the code appears, and each line lights up as the animation runs. You see what each line is doing, not just what it says.

04
Defend it out loud

An AI interviewer asks you to explain the idea. If you can't, you don't pass. That's the bar a real interview will hold you to anyway.

What we cover.

Arrays & Strings
  • Two pointers
  • Sliding window
  • Prefix sums
  • Kadane's
Searching & Sorting
  • Binary search
  • Quicksort
  • Mergesort
  • Heap sort
Hashing
  • Hash maps
  • Hash sets
  • Collision handling
  • LRU caches
Recursion & Backtracking
  • Towers of Hanoi
  • N-Queens
  • Subsets & permutations
  • Sudoku solver
Trees
  • BST
  • Traversals
  • Diameter
  • Tries
Graphs
  • BFS / DFS
  • Dijkstra
  • Topological sort
  • Union-find
Dynamic Programming
  • Knapsack
  • LIS
  • LCS
  • Matrix-chain
System Design (intro)
  • Rate limiter
  • URL shortener
  • News-feed
  • Chat
"

You can watch every playlist, take perfect notes, and still freeze when someone asks you to explain recursion. Stories fix the explaining — you watch Hanoi happen, then say it back in your own words.

Why stories workIf you can't explain it, you don't own it yet
Start with a story.

See a full lesson before you decide.

Watch a 12-minute Binary Search story — no signup needed.
Watch the story
Every story ends with you explaining it back

Questions, answered.

Every concept opens as a short animated story — a character with a problem you have been in, no code, no keywords. Then the idea animates, the code appears line by line synced to the animation, and finally an AI interviewer asks you to explain it out loud. Idea first, syntax second.

The full placement syllabus: arrays and strings, searching and sorting, hashing, recursion and backtracking, stacks and queues, trees, graphs, and dynamic programming — plus an introduction to system design (rate limiters, URL shorteners, feeds). Aligned with the AICTE curriculum.

Yes — stories are marked Beginner, Intermediate or Advanced, and the path starts assuming nothing beyond basic programming. Because each concept is taught before its syntax, beginners are exactly who the format was designed for.

Yes. The free plan includes the first lesson and a 7-day learning path, plus limited AI tutor help and practice problems — no credit card needed. Paid plans unlock all 29 lessons and monthly content drops.

Videos are watched passively; stories here end with a gate. An AI interviewer asks you to explain the idea in your own words, and if you cannot, you do not pass the lesson — the same bar a real interview will hold you to.