Correct Code Press · Book Four

Solving LeetCode Without Memorization

JavaScript as a Transcription Language.

Solve variations without panic because you are solving shapes, not stories.

Book Four takes the Correct Code discipline into interview problems. LeetCode is not the algorithm — it is a stage where constraints are disguised as stories. The work is the same: define a world, name the rules, maintain an invariant, and make only lawful decisions.

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Requires Student

Book Four: Solving LeetCode Without Memorization cover
Strip the story, extract the law
Write the invariant before the code
Continues Book Zero and Book One

What You'll Learn

Solve Shapes, Not Stories

Every LeetCode prompt is a constraint document. Book Four trains you to strip the narrative layer, name the invariant, and transcribe a completed investigation into JavaScript.

LeetCode Is Not the Algorithm

It is a stage where constraints are disguised as stories.

Strip the Story

Every prompt is a constraint document. Find the structure beneath the narrative layer.

Write the Invariant

Make it a sentence you can defend before writing a line of code.

Transcription Discipline

If you are still reasoning, you are not transcribing. Every line maps to a proof obligation.

Lawful Elimination

Constraints, gates, and elimination that shrink the space safely.

The Routing Pipeline

The control plane that decomposes a problem into lawful frames.

The Translation Layer

Turning completed reasoning into JavaScript without cleverness.

No Memorization-First Framing

Shapes are introduced as structural necessities, not templates.

No Cleverness

Code must be explainable under pressure.

Variations Without Panic

You are solving shapes, not stories — so variations stop being surprises.

Table of Contents

A Contract, Then Twelve Worked Case Files

Part I builds the LeetCode contract: how constraints, gates, and elimination become a routing pipeline. Part II walks twelve problems end-to-end as transcription, not memorization.

Part I: The LeetCode Contract
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1
LeetCode Is Not the Algorithm
The story is camouflage. The constraints are the computation.
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2
Constraints, Gates, and Lawful Elimination
Every move must be authorized by the constraint set.
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3
JavaScript as a Transcription Language
It will not hide the proof. If reasoning is incomplete, the code reveals it.
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4
The Routing Pipeline (Control Plane)
Decomposing a problem into lawful frames.
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5
The Translation Layer (From Reasoning to Code)
Transcribing a completed investigation.
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Part II: The First Case Files
Twelve worked problems
P1
Two Sum
Recorders and the complement constraint.
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P2
Valid Palindrome
Scanners and lawful comparison.
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P3
Remove Duplicates
In-place movement over sorted input.
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P4
Move Zeroes
Partitioning with a preserved invariant.
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P5
Best Time to Buy/Sell Stock
Maximal difference under an ordering constraint.
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P6
Binary Search
Elimination as the core of the search.
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P7
Search Insert Position
Where an element must legally belong.
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P8
Linked List Cycle
Movement and detection without revisiting.
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P9
First Bad Version
A monotone gate turned into a search.
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P10
Squares of a Sorted Array
Two pointers on ordered data.
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P11
House Robber
The recorder and the forbidden adjacency.
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P12
House Robber II
The circular world and its boundaries.
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From the Book

How the Method Reads

The One-Sentence Translation

A LeetCode prompt is a constraint document. Your algorithm is the lawful elimination you can justify under those constraints. You do not chase stories. You extract law.

Non-Negotiable Rule

If you are still reasoning, you are not transcribing. Each frame chooses one of three outcomes — move, stop, record — all justified by the invariant, until only one lawful answer remains.

See the Framework

Start With the Case Files

Case File 001: Find Target Element

A worked CCF investigation behind a classic search.

Watch on the video library

Case File 002: Two Sum

Recorders and the complement constraint in action.

Watch on the video library

Case File 003: Two Sum II

Coordinated elimination on ordered input.

Watch on the video library

Some videos require membership access. Visit the video library to see what's unlocked for your plan.

Who It's For

Book Four is for interview prep without the pattern treadmill

Developers preparing for technical interviews without a memorization plan
Engineers who panic when the pattern doesn’t match
Students who want solutions they can explain under pressure
JavaScript developers who want transcription discipline
Anyone who wants to solve shapes, not stories

Where It Fits

Book Zero Is the Required Foundation

Start With Book Zero Learn the detective contract: problem space, answer space, decisions, and proof.
Then the Reasoning & Structures Books Books One and Two give the method and the machinery this book transcribes.
Finish With the Interview Arena Apply everything to the stage where constraints are disguised as stories.

Unlock the Full Book Library

Solving LeetCode Without Memorization is included with Student Access, which also unlocks Book Zero and every current algorithm book from Correct Code Press.

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