LeetCode #1323 | Maximum 69 Number 🔥 Simple C++ Solution

In this video, we solve LeetCode 1323 — Maximum 69 Number using a simple and optimized Greedy Approach in C++ with a clean step-by-step explanation.

At first, this problem may look very easy,
but the main challenge is understanding why changing the first 6 gives the maximum possible number.

Once you understand the greedy logic behind it,
the entire problem becomes super simple and interview-friendly.

In this walkthrough, you'll learn how to think logically and explain the solution clearly during coding interviews.

✨ What You'll Learn In This Video

🔹 Problem Understanding
🔹 Why Changing the First 6 Works
🔹 Greedy Algorithm Intuition
🔹 Step-by-Step Dry Run
🔹 Clean & Optimized C++ Solution
🔹 Time Complexity & Space Complexity
🔹 Interview Explanation Tips

📌 Problem Link
https://leetcode.com/problems/maximum-69-number/

🎯 Why This Problem Matters

This is one of the best beginner-friendly Greedy problems.

It improves:
✔ Greedy Thinking
✔ String Manipulation
✔ Problem Solving Skills
✔ Interview Communication
✔ Basic Optimization Thinking

🧠 Concepts Covered

✔ Greedy Algorithm
✔ String Conversion
✔ Character Traversal
✔ Simulation
✔ C++ STL Basics

⏱ Time Complexity: O(n)
📦 Space Complexity: O(n)

🌍 Find Me Online

💻 GitHub
https://github.com/vedantxy

🏆 LeetCode Profile
https://leetcode.com/u/Vedant_2403/

💼 LinkedIn
https://www.linkedin.com/in/vedant-patel-3b6a4636a/

🐦 Twitter / X
https://x.com/VedantPate1601

🚀 Portfolio Website
https://vedant-patel-developerportfolio.vercel.app/

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don’t forget to Like 👍 Subscribe 🔔
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Видео LeetCode #1323 | Maximum 69 Number 🔥 Simple C++ Solution канала code with vedant