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Problem Solving Practice Repository

Welcome to my Problem Solving Practice repository! 👋

🚀 About This Repository

This repository is dedicated to improving my problem-solving skills using Java. It focuses on mastering algorithms and data structures through hands-on practice and challenges.

Problems are sourced from platforms like Codeforces and LeetCode, as well as structured courses for systematic learning.

🎯 Goals

  • Strengthen algorithmic thinking and coding proficiency.
  • Prepare for coding interviews with comprehensive practice.
  • Build efficient and optimized solutions to challenging problems.

📚 Topics Covered

Arrays and Strings

  • Sliding Window
  • Two Pointers
  • Fast and Slow Pointers
  • Sorting Algorithms
  • Searching Algorithms
  • Prefix Sum

Linked Lists and Stacks

  • In-place Reversal of a Linked List
  • Linked Lists
  • Stacks and Queues
  • Queues and Deques

Trees and Graphs

  • Tree Breadth-First Search
  • Tree Depth-First Search
  • Topological Sort (Graph)
  • Graph Basics and Traversals
  • Graph Algorithms (DFS, BFS, Dijkstra's, Floyd-Warshall)

Dynamic Programming

  • 0/1 Knapsack
  • Longest Common Substring
  • Advanced Dynamic Programming
  • Bitwise XOR
  • Subsets

Greedy Algorithms

  • Merge Intervals
  • Cyclic Sort
  • Greedy Strategies

Divide and Conquer

  • Modified Binary Search

Advanced Topics

  • Two Heaps (Priority Queues)
  • K-way Merge
  • Trie (Prefix Tree)
  • Segment Trees and Fenwick Trees
  • Disjoint Set Union (Union-Find)
  • Computational Geometry
  • Number Theory
  • String Matching Algorithms (KMP, Rabin-Karp, Z-Algorithm)
  • Bit Manipulation Techniques

📂 Project Structure

root/
  ├── DSA/                        # Practice by topics (Leetcode & Codeforces)
  │   ├── arrays_and_strings/
  │   ├── linked_lists_and_stacks/
  │   ├── trees_and_graphs/
  │   ├── dynamic_programming/
  │   ├── greedy_algorithms/
  │   ├── divide_and_conquer/
  │   ├── advanced_topics/
  │   └── utils/
  ├── Leetcode/                   # Practice by Contests and Study Plans
  │   ├── contests/
  │   ├── study_plans/
  ├── test/
  │   ├── DSA/
  │   ├── Leetcode/
  ├── README.md
  ├── .gitignore
  ├── pom.xml
  ├── build.gradle
  ├── LICENSE

Feel free to explore the repository and contribute your suggestions or solutions! 🚀