LeetCode 394 | Decode String | Stack + Recursion Python Tutorial | AlgoYogi
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In this video, we solve *LeetCode problem 394: Decode String* using Python. This problem combines *stack and recursion* to decode nested expressions like `"3[a2[c]]"`—an excellent exercise in parsing and managing state.
👉 *LeetCode Problem Link:* [Decode String – LeetCode 394](https://leetcode.com/problems/decode-...)
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⏱️ Timestamps
0:00 Introduction
0:20 Problem Explanation & Constraints
1:00 Approach – Stack & Recursion Mixed
10:00 Python Code Walkthrough
17:00 Time & Space Complexity
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💡 Why Watch?
Understand how to *parse nested patterns* using stack frames or recursive calls
Manage current strings and multipliers cleanly during traversal
A great problem for mastering *string parsing and recursion techniques*
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📢 Next Steps:
Try related problems like:
*Decode Ways*
*Evaluate Reverse Polish Notation*
*Simplify Path*
Share your optimized versions or tricky cases in the comments!
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#LeetCode #Python #DecodeString #Stack #Recursion #AlgoYogi #CodingInterview
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