Decode String | FAANG Coding Question | Stack
In this video, you will learn how to solve the popular algorithm problem "Decode String" using the stack data structure asked at Google, Facebook, Microsoft, Amazon, Snapchat, and many more companies! For this problem, we must decode an encoded string. The solution involves utilizing two stacks -- one for the digits and one for the letters. As we iterate over our encoded string, we must add the characters to their respective stacks. When we encounter an open bracket, that means we are at the start of an encoding. When we encounter a closing bracket, that means we are at the end of an encoding. By the end of iteration, we will have decoded all encodings inside of our string.
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⭐️ Timestamps ⭐️
00:00 | Intro
00:27 | Problem Statement
01:48 | When To Use a Stack
02:26 | Algorithm Walkthrough
08:34 | Code Walkthrough
15:41 | Time & Space Complexity
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