Скачать или смотреть contains duplicate | logic+brute force +optimal | coding interview preparation | Leetcode

In this video, we solve LeetCode 217 – Contains Duplicate problem step by step.

We cover:
✔️ Problem Understanding
✔️ Logic Explanation
✔️ Brute Force Approach (O(n²))
✔️ Optimal HashSet Approach (O(n))
✔️ Time & Space Complexity Analysis

This is an EASY level problem but very important for coding interviews and placements.

If you're preparing for:
• Placements
• Product-based companies
• Coding interviews
• DSA practice
• LeetCode beginners roadmap

Then this video is for you!

💡 Problem: Given an integer array nums, return true if any value appears at least twice in the array.

We implement the solution in Java.

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