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HashSet in Java stores unique elements and does not maintain order In this video, learn how HashSet works and when to use ...

Crushed LeetCode #217 Contains Duplicate today! Super common interview starter. Why HashSet? Brute O(n²) TLEs → O(1) ...

HashSet collection in java.

In this video of code decode we have explained most asked java tricky interview questions which developers fails to answers ...

Welcome to Day 3 of my 100 Days DSA Challenge In this video, I have explained the Contains Duplicate problem from ...

Java Program to Find Duplicate Elements in Array | Full Explanation In this video, we learn how to find duplicate elements in an ...

Se você sempre se confunde entre List, Set e Map em Java, esse vídeo vai resolver isso de uma vez por todas. Aqui eu explico ...

Given an array of integers arr[] and a number k. Return the maximum sum of a subarray of size k. Note: A subarray is a contiguous ...

Neetcode 150 | Contains Duplicate | Complete DSA Series In this video, we solve the LeetCode problem Contains Duplicate ...

Learn how to solve the 'Contains Duplicate' coding interview problem efficiently using Hash Sets! In this video, we break down ...

Core Java Concepts Revision | 2 Jan – 4 Jan | Preparation** In this video, I've revised all the **important Core Java concepts** ...

In this video, DSA in Java – HashMap 02, we cover important concepts of HashMap in Java as part of the Java in One Shot series.

🎥 Welcome to our first live class of the "Basic Java to Advanced Spring Boot Backend Development Course"! In this session ...

In this coding tutorial, we dive deep into the 'Find the Duplicate Number' problem, a popular question in technical interviews at top ...

Learn how to solve the Happy Number problem (LeetCode 202) efficiently! In this video, we break down the logic behind ...

Learn how to efficiently find all missing numbers in an array [1, n] using the Index Marking technique! In this video, we break ...

In this video, I explain how Java HashSet works internally and why it is built on top of HashMap. You will learn: • What a HashSet ...

Learn how to efficiently solve the 'Valid Sudoku' problem, a popular question in coding interviews! In this video, we break down ...

Learn how to efficiently solve the 'Subarray with Zero Sum' problem using the Prefix Sum and Hashing technique! In this video ...

From Brute Force to Optimal | 100+ LeetCode Interview Problems Explained Cracking coding interviews is NOT about ...