🧠 Problem Solving

Rokesh Venkat · Competitive Programmer · Chennai, India
Curated solutions across 4 major coding platforms — organized by platform, language, and topic.

📊 Live Platform Stats

Last Updated: 2026-10-09 17:34 UTC

🔵 Codeforces

📊 Stats Dashboard

Platform	Problems Solved	Status	Profile
LeetCode	170+ ✅	50 Days Active 🔥	rokesh_lc
Codeforces	17	Active 📈	Rokesh_Venkat
AtCoder	—	Getting Started 🚀	Rokesh_Venkat
HackerRank	—	Active 💪	RokeshVenkat

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📊 Platform Stats (Detailed)

🟡 LeetCode — rokesh_lc

Problem Breakdown by Difficulty:

Easy	Medium	Hard	Total
80	65	25	170+

Language Breakdown:

C++	Java	MySQL	Python
125	35	10	—

Top Skill Topics:

🔴 Advanced	🟡 Intermediate	🟢 Fundamental
Dynamic Programming ×16	Math ×43	Array ×71
Divide & Conquer ×5	Hash Table ×26	String ×44
Backtracking ×3	Binary Search ×20	Two Pointers ×24

Extra Info:

• 🌍 Global Rank: #1,080,401
• 🇮🇳 Country: India
• 🏆 Badges: 50 Days Badge 2026
• 🔥 Current Streak: Active
• 🎓 College: RMD Engineering College

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🔵 Codeforces — Rokesh_Venkat

Statistics:

Metric	Value
🏅 Current Rating	Unrated (Getting Started)
📊 Total Problems Solved	17
📅 Registered	~3 months ago
🔥 Max Streak	2 days in a row
📆 Last Month Solved	15 problems
📆 Last Year Solved	17 problems
🎯 Rating Trend	Climbing 📈

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⚪ AtCoder — Rokesh_Venkat

Metric	Value
🏅 Current Rating	Unrated (Getting Started)
🇮🇳 Country	India 🇮🇳
🎂 Birth Year	2007
🔗 Codeforces Linked	✅ Yes
🏁 Rated Contests	0 (Ready to compete)
🎯 Next Goal	Participate in first ABC contest

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🟢 HackerRank — RokeshVenkat

Metric	Value
🔗 Profile	Visit Profile
🧩 Domains	Problem Solving, SQL, Data Structures
⭐ Focus Areas	Algorithms, SQL Basics, 30 Days of Code
🎯 Status	Active & Growing

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🗂️ Repository Structure

Problem_Solving/
│
├── 📁 LeetCode/
│   ├── Arrays/              → Array manipulation problems
│   ├── Strings/             → String processing & manipulation
│   ├── Dynamic_Programming/ → DP optimized solutions
│   ├── Binary_Search/       → Search & sorting techniques
│   ├── Hash_Table/          → Hash-based problems
│   ├── Two_Pointers/        → Two pointer technique
│   ├── Trees/               → Binary trees & BST
│   ├── Graphs/              → Graph algorithms
│   ├── LinkedList/          → Linked list operations
│   └── Math/                → Mathematical problems
│
├── 📁 Codeforces/
│   ├── Contest_1/           → Contest solutions
│   ├── Contest_2/           → ...
│   └── README.md            → Codeforces notes
│
├── 📁 AtCoder/
│   ├── ABC_XXX/             → AtCoder Beginner Contest
│   ├── ARC_XXX/             → AtCoder Regular Contest
│   └── README.md            → AtCoder notes
│
├── 📁 HackerRank/
│   ├── Algorithms/
│   ├── Data_Structures/
│   ├── SQL/
│   └── README.md            → HackerRank notes
│
├── 📁 .github/workflows/
│   └── update-stats.yml     → Auto-update stats workflow
│
├── 📁 scripts/
│   └── update_stats.py      → Stats collection script
│
├── 📄 README.md             → This file (Auto-updated)
├── 📄 CONTRIBUTING.md       → How to contribute
└── 📄 LICENSE               → MIT License

📝 File Naming Convention

• LeetCode: {Problem_Number}-{Problem_Name}.{language}

  • Example: 1-Two_Sum.cpp, 206-Reverse_LinkedList.java

• Codeforces: {Contest}-{Problem_Letter}.{language}

  • Example: Div2_900-A.cpp, Educational_Round_150-B.java

• AtCoder: {Contest_Type}-{Problem_Letter}.{language}

  • Example: ABC_150-A.cpp, ARC_100-B.java

• HackerRank: {Domain}-{Problem_Name}.{language}

  • Example: Algorithms-Simple_Array_Sum.py

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🛠️ Languages & Tools

Language Proficiency

Language	Proficiency	Primary Use
C++	⭐⭐⭐⭐⭐	Competitive Programming (90% of solutions)
Java	⭐⭐⭐⭐	Object-Oriented Problems, DSA
Python	⭐⭐⭐	Quick prototyping, Algorithm learning
SQL	⭐⭐⭐	Database queries, HackerRank SQL

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🚀 Getting Started

Clone This Repository

git clone https://github.com/rokesh-venkat/Problem_Solving.git
cd Problem_Solving

Browse Solutions

1. By Platform: Navigate to LeetCode/, Codeforces/, etc.
2. By Topic: Look inside each platform folder for topic-wise organization
3. By Problem: Search for the problem number or name

How to Use These Solutions

• 📖 Learn: Read through solutions to understand different approaches
• 🔍 Reference: Use as a reference while solving similar problems
• 🧪 Practice: Try solving before looking at the solution
• 📝 Implement: Implement in your preferred language

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🏆 Achievements & Milestones

• 🥇 50 Days Badge 2026 — LeetCode Consistent Challenge 🔥
• 📈 15 Problems in Last Month — Codeforces
• 🧩 170+ Problems Solved — LeetCode total
• 🌐 4 Platforms Active — Simultaneous multi-platform engagement
• 🎓 DSA Mastery — 10+ major data structure topics covered
• 🚀 Growth Trajectory — Consistently improving & learning

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💡 Tips for Competitive Programming

Best Practices Used in This Repo

1. Time Complexity Analysis — O(n) notation in comments
2. Space Optimization — Memory-efficient solutions preferred
3. Clean Code — Readable, well-commented solutions
4. Multiple Approaches — When applicable, different solutions shown
5. Test Cases — Included for complex problems

How to Approach Each Problem

1. Understand the problem statement
2. Identify input/output format
3. Think of brute force approach
4. Optimize time & space complexity
5. Code & test with examples
6. Submit & iterate if needed

Learning Path Recommended

Beginner  → Arrays, Strings, Basic Math
↓
Intermediate → Sorting, Searching, Hash Tables
↓
Advanced  → Trees, Graphs, Dynamic Programming
↓
Expert    → Greedy, Backtracking, Advanced DP

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📈 Activity Timeline & Stats

Solve Rate

Period	LeetCode	Codeforces	AtCoder	HackerRank
All Time	170+ ✅	17 ✅	—	Active ✅
Last Year	170+ 📈	17 📈	—	Active 📈
Last Month	25+ 🚀	15 🚀	—	Active 🚀
Max Streak	50 Days 🏅	2 Days 🔥	—	—

Consistency Chart

LeetCode  ████████████████████ 100% (50 Days)
Codeforces ██████░░░░░░░░░░░░░░  30% (Active)
AtCoder   ██░░░░░░░░░░░░░░░░░░  10% (Starting)
HackerRank ███████░░░░░░░░░░░░░  35% (Focused)

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🤝 Contributing

How to Use This Repo for Learning

1. Fork this repository (optional)
2. Browse solutions by platform/topic
3. Compare your approach with the solutions
4. Implement similar problems using these patterns
5. Star ⭐ if helpful!

Want to Contribute?

This is my personal learning repository, but contributions are welcome!

Types of contributions:

• 🐛 Bug fixes in existing solutions
• ✨ Optimized solutions (better time/space complexity)
• 📝 Better explanations & comments
• 🏷️ Categorization & organization improvements

How to contribute:

# 1. Fork the repository
# 2. Create a feature branch
git checkout -b feature/improved-solution

# 3. Make your changes
# 4. Commit with clear message
git commit -m "✨ Optimize BFS solution in Tree problems"

# 5. Push to your fork
git push origin feature/improved-solution

# 6. Open a Pull Request

Please ensure:

• ✅ Code is clean & well-commented
• ✅ Time & space complexity is mentioned
• ✅ Follows existing naming conventions
• ✅ Includes test cases if possible

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📚 Learning Resources

Platforms Used

• 🟡 LeetCode — Premium problems, excellent explanations
• 🔵 Codeforces — Contests, rating system, large community
• ⚪ AtCoder — Japanese contests, unique problems
• 🟢 HackerRank — Interview prep, structured learning

Recommended Topics to Master

Data Structures         Algorithms              Advanced Topics
─────────────────      ──────────────────     ─────────────────
Arrays                 Sorting                Dynamic Programming
Linked Lists           Searching (Binary)     Greedy Algorithms
Stacks & Queues        Two Pointers           Graph Algorithms
Hash Tables            Sliding Window         Backtracking
Trees                  Recursion              Segment Trees
Graphs                 Divide & Conquer       Trie
Heaps                  BFS/DFS                Union-Find

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🔗 Quick Links

🟡 LeetCode	🔵 Codeforces	⚪ AtCoder	🟢 HackerRank
Profile	Profile	Profile	Profile
rokesh_lc	Rokesh_Venkat	Rokesh_Venkat	RokeshVenkat

Social & Other Links

Platform	Link
GitHub	github.com/rokesh-venkat
Portfolio	Coming Soon 🚀
Email	[email protected]

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📖 How to Navigate This Repo

Quick Start

# View LeetCode solutions
ls LeetCode/Arrays/
cat LeetCode/Arrays/1-Two_Sum.cpp

# View Codeforces solutions
ls Codeforces/
cat Codeforces/Div2_900-A.cpp

# Search for a topic
grep -r "dynamic_programming" LeetCode/

Finding Solutions by Difficulty

• 🟢 Easy: LeetCode folder first tier
• 🟡 Medium: Second tier, Codeforces Div2 A-B
• 🔴 Hard: Third tier+, Codeforces Div2 C-D, AtCoder ABC D+

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🎯 Future Goals

• Solve 250+ problems on LeetCode
• Achieve Specialist rating (1400+) on Codeforces
• Participate in AtCoder Beginner Contests regularly
• Complete all 6 HackerRank domains
• Build a personal portfolio website
• Contribute to open-source projects
• Mentor others in competitive programming

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📊 Statistics (Auto-Updated Daily)

These stats update automatically every day at 12:00 UTC via GitHub Actions

Last Updated: See individual platform sections above
Update Frequency: Daily ⏰
Platforms Tracked: 4 major coding platforms
Total Solutions: 200+ across all platforms

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⚡ Quick Stats Card

╔════════════════════════════════════════╗
║      PROBLEM SOLVING SCORECARD        ║
╠════════════════════════════════════════╣
║  LeetCode    ████████████░░░░░░░░  85%  ║
║  Codeforces  ░░░░░░░░░░░░░░░░░░░░   5%  ║
║  AtCoder     ░░░░░░░░░░░░░░░░░░░░   3%  ║
║  HackerRank  ░░░░░░░░░░░░░░░░░░░░   7%  ║
╠════════════════════════════════════════╣
║  Total Problems Solved:   200+         ║
║  Current Streak:          50 Days 🔥   ║
║  Platforms Active:        4 / 4 ✅     ║
║  Languages Used:          3 (C++,Java) ║
╚════════════════════════════════════════╝

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📝 Notes & Tips

Problem-Solving Approach

1. Read Carefully — Understand constraints & edge cases
2. Think First — Plan before coding (pseudocode helps)
3. Code Clean — Use meaningful variable names
4. Test Thoroughly — Edge cases, large inputs, negative cases
5. Optimize — Improve time/space if solution is correct
6. Learn — Understand why your solution works

Common Mistakes to Avoid

• ❌ Integer overflow (use long long in C++)
• ❌ Off-by-one errors in loops
• ❌ Not considering edge cases (empty input, single element)
• ❌ Inefficient algorithms (TLE - Time Limit Exceeded)
• ❌ Incorrect data type usage
• ❌ Not reading problem constraints carefully

Templates Available

This repo includes templates for:

• ✅ C++ competitive programming setup
• ✅ Fast I/O techniques
• ✅ Common data structure implementations
• ✅ Algorithm templates (BFS, DFS, DP, etc.)

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📞 Support & Feedback

Have Questions?

• 🔍 Search the repo for similar problems
• 💬 Check problem discussions on respective platforms
• 📧 Create an issue if you find bugs in solutions
• ⭐ Star the repo if it helped you!

Found a Better Solution?

• 🔀 Open a Pull Request with your optimized solution
• 📝 Add explanations in comments
• 📊 Compare complexities with existing solutions

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📄 License

This project is open source and available under the MIT License.

Feel free to:

• ✅ Use these solutions for learning
• ✅ Fork and modify for your learning
• ✅ Reference in your projects
• ✅ Share with others (with credit)

Please:

• ✅ Star the repo if helpful
• ✅ Link back to original repo
• ✅ Don't claim solutions as your own in competitions

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🙏 Acknowledgments

• LeetCode — Excellent problem selection & editorials
• Codeforces — Best platform for competitive programming
• AtCoder — Unique & interesting problems
• HackerRank — Great for structured learning
• GeeksforGeeks — Helpful articles & explanations
• CP-Algorithms — Advanced algorithm resources

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Made with 💜 by Rokesh Venkat

RMD Engineering College, Chennai

"The only way to learn programming is by writing code." — Bjarne Stroustrup

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Last Updated: This README auto-updates daily via GitHub Actions
Next Update: Tomorrow at 12:00 UTC 🚀