Longest Subarray with Sum = K | Prefix Sum + Hash Map Explained Step-by-Step (Python / LeetCode) скачать в хорошем качестве

Longest Subarray with Sum = K | Prefix Sum + Hash Map Explained Step-by-Step (Python / LeetCode)

In this video, we deeply and step-by-step solve one of the most important interview problems: Longest Subarray with Sum = K You’ll learn: Why brute force and sliding window fail The prefix sum + hash map pattern Why we store the earliest index only A mathematical proof (not hand-waving) A full dry-run walkthrough like a debugger Interview-ready intuition you can reuse everywhere This pattern appears in: LeetCode FAANG interviews Competitive programming Real systems (logs, balances, streams) If you understand this video, you unlock: 👉 Subarray Sum problems 👉 Zero-sum subarrays 👉 Binary array balance problems 👉 String balance problems 📌 Language: Python 📌 Level: Beginner → Intermediate → Interview-ready 📌 No memorization. Only understanding. longest subarray sum k prefix sum hash map subarray sum leetcode leetcode prefix sum hash map interview questions python dsa arrays and hashing coding interview preparation sliding window vs prefix sum faang interview questions neet code patterns data structures and algorithms python coding interview