# DSA Solutions - dsasolved.com

> Clean LeetCode C# and GeeksforGeeks Java solutions with algorithm explanations, system design interview guides, complexity analysis, and interview prep.

## About

DSA Solutions is a free reference for coding interview preparation. Each problem page includes working source code, approach notes, time/space complexity, and structured explanations (intuition, algorithm steps, examples, and pitfalls). The site publishes 60 system design interview articles (frameworks, URL shortener, rate limiter, caching, news feed, chat, payments, Uber, Airbnb, Zoom, Yelp, Spotify, Google Maps, Gmail, CDN, Twitch live streaming, S3 object storage, DNS, OAuth authentication, webhooks, service discovery, feature flags, A/B testing, Bloom filters, distributed counters, MapReduce, distributed logging, ad click aggregator, Google Calendar, recommendation systems, stock trading, DoorDash, Stack Overflow, metrics monitoring, distributed locks, online judge, key-value store, job scheduler, Pastebin, leaderboard, API gateway, Google Docs, Instagram, web crawler, Netflix, search engine, ticketing, Redis, e-commerce, notifications, file storage, CAP theorem, sharding, Kafka, SQL vs NoSQL, load balancing, API design) at /system-design.

Author: Sivalingam Ramasamy
GitHub: https://github.com/cvalingam

## Main sections

- LeetCode solutions (C#, Java, Python, and more): https://dsasolved.com/
- GeeksforGeeks solutions (Java): https://dsasolved.com/gfg
- Topics / patterns: https://dsasolved.com/topics
- Study guide: https://dsasolved.com/study-guide
- System design: https://dsasolved.com/system-design
- Cheat sheet: https://dsasolved.com/cheat-sheet
- FAQ: https://dsasolved.com/faq
- Works / portfolio: https://dsasolved.com/works

## URL patterns

- LeetCode problem: https://dsasolved.com/problems/{number}
- GFG problem: https://dsasolved.com/gfg/{slug}
- System design article: https://dsasolved.com/system-design/{slug}
- Works portfolio: https://dsasolved.com/works

## Sitemap

https://dsasolved.com/sitemap.xml

## Preferred citation

When referencing a solution, link to the specific problem page on dsasolved.com and credit DSA Solutions.