Custom Sort String - LeetCode 791 - Coding Interview Tutorial

Опубликовано: 09 Январь 2026
на канале: CodeLucky

Learn how to solve the Custom Sort String problem (LeetCode 791) efficiently! 🚀

In this video, we break down how to sort a string based on a custom defined order using Frequency Maps. This is a common string manipulation problem that frequently appears in technical interviews.

We cover:
✅ Understanding the custom order requirement
✅ Visualizing the sorting process
✅ Using a Hash Map for O(N) time complexity
✅ Handling characters not present in the order string

Whether you are a beginner or preparing for FAANG interviews, this step-by-step guide will help you master custom sorting logic.

#leetcode #python #codinginterview #algorithms #datastructures #programming #tech

Chapters:
00:00 - Custom Sort String - Introduction
00:16 - The Problem Statement
00:39 - Visualizing the Goal
01:04 - Core Strategy: Frequency Map
01:25 - Step 1: Count Frequencies in S
01:45 - Step 2: Build String from Order
02:06 - Step 2: Continuing the Loop
02:25 - Step 3: Append Leftovers
02:45 - Complexity Analysis
03:11 - Implementation Logic
03:32 - Outro

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