Question 1

Maximum subarray (Kadane) vs divide-and-conquer — proof of correctness?

Accepted Answer

**Target Audience:** Candidates who already know Kadane's algorithm and want to explain why it works and how it compares.
**Difficulty:** Medium
**Language:** Python 3

> **How to read this doc:** every idea is explained in plain words first. When a word appears that an interviewer will expect you to know, it is tagged `📌 Interview term:` with a one-line definition, and every tagged term is collected in the Quick Glossary at the end. Every program on this page was actually run, and the output y

Question 2

How do you find the maximum subarray sum?

Accepted Answer

**Target Audience:** Beginners preparing for coding interviews; you should know arrays and loops.
**Difficulty:** Medium
**Language:** Python 3

> **How to read this doc:** every idea is explained in plain words first. When a word appears that an interviewer will expect you to know, it is tagged `📌 Interview term:` with a one-line definition, and every tagged term is collected in the Quick Glossary at the end. Every program on this page was actually run, and the output you see in the **Verified

Question 3

How do you find the maximum product subarray?

Accepted Answer

**Target Audience:** Beginners preparing for coding interviews — you need loops, arrays and the idea of a running best value.  
**Difficulty:** Medium  
**Language:** Python 3

> **How to read this doc:** every idea is explained in plain words first. When a word appears that an interviewer will expect you to know, it is tagged `📌 Interview term:` with a one-line definition, and every tagged term is collected in the Quick Glossary at the end. Every program on this page was actually run, and the

DATA STRUCTURES & ALGORITHMSDECODED.

Medium

Maximum subarray (Kadane) vs divide-and-conquer — proof of correctness?

How do you find the maximum subarray sum?

How do you find the maximum product subarray?