Java Data Structures & Algorithms

This repository contains my structured preparation for Data Structures and Algorithms focused on coding interviews.

Topics Covered

• Arrays
• Strings
• Hashing
• Sliding Window
• Two Pointers
• Stack & Queue
• Trees
• Graphs
• Dynamic Programming
• Backtracking
• Greedy

Structure

Each solution includes:

• Problem description
• Approach explanation
• Time Complexity
• Space Complexity

Example:

Time Complexity: O(n)
Space Complexity: O(1)

Goal

Strengthening problem-solving skills and mastering patterns for scalable system design interviews.