Mahendra Yadav

Let me save you 50+ hours of jumping between Leetcode lists with this list of 96 Leetcode problems, patterns + pattern triggers. This will make everyone sitting for placements, interviews, and grinding Leetcode solve 50-70% faster. The goal is simple: spot the pattern early, reduce the search space, and save time in those 45-minute rounds. Use this as a cheatsheet. The keywords are triggers, not guarantees. But they’ll help you narrow down the right approach much faster. [1] Sliding Window Keywords: contiguous, substring, longest/shortest, at most k Problems: 3, 76, 424, 567, 904, 1004 [2] Two Pointers Keywords: sorted array, pair sum, left-right, move inward Problems: 11, 15, 42, 125, 167, 881 [3] Binary Search Keywords: sorted/monotonic, first/last, search space, log n Problems: 33, 34, 153, 704, 875, 1011 [4] Hashing + Prefix Sum Keywords: frequency, fast lookup, running sum, subarray count Problems: 1, 49, 128, 560, 525, 974 [5] Monotonic Stack Keywords: next greater, previous smaller, span, maintain order Problems: 84, 496, 503, 739, 901, 907 [6] Heap / Top K Keywords: top k, priority, smallest/largest, stream Problems: 215, 295, 347, 378, 621, 703 [7] Intervals Keywords: merge, overlap, meeting time, sort by start/end Problems: 56, 57, 435, 452, 986, 1288 [8] BFS Keywords: shortest path, level order, queue, neighbors Problems: 102, 127, 199, 994, 1091, 752 [9] DFS / Backtracking Keywords: all combinations, choices, recursion, undo move Problems: 39, 40, 46, 78, 79, 131 [10] Trees Keywords: subtree, depth, ancestor, recursive structure Problems: 98, 104, 124, 230, 236, 543 [11] Linked List Keywords: pointers, reverse, merge, node manipulation Problems: 19, 21, 23, 141, 143, 206 [12] Union Find Keywords: connected components, groups, merge sets, parent Problems: 547, 684, 721, 947, 990, 1319 [13] Topological Sort Keywords: dependency order, DAG, in-degree, course schedule Problems: 207, 210, 310, 802, 1136, 1203 [14] Trie Keywords: prefix, dictionary, startsWith, autocomplete Problems: 208, 211, 212, 648, 677, 1268 [15] Greedy Keywords: best local choice, maximize/minimize, jump, intervals Problems: 45, 55, 134, 406, 763, 1029 [16] Dynamic Programming Keywords: overlapping subproblems, state, transition, optimal result Problems: 70, 198, 213, 300, 322, 746

🎉 We’re delighted to welcome @FreJunTeler as the Gold Sponsor for #PyConfHyd2026 They enable AI agents and apps to make and receive real phone calls using real-time audio streaming & SIP connectivity. 🙏Thank you for supporting us! 📖More Details: 2026.pyconfhyd.org/blogs/frejun-t…

⏳The countdown is on! Just 5 days to go for #PyConfHyd2026 Get ready for inspiring talks, insightful sessions, networking and a memorable experience. 🎟️If you haven’t purchased yet, this is the time. Tickets will be closing soon, grab yours now! 🔗 2026.pyconfhyd.org/tickets

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📢The wait is over Pythonistas! @EPAMSystems is the workshop venue for #PyConfHyd2026. Get ready for hands-on sessions where you’ll build real skills and deepen your knowledge. 📍maps.app.goo.gl/1hwDWY1Yh8UXj5… 🎟️ Workshop seats are limited, secure yours now: 2026.pyconfhyd.org/tickets

🎉 We’re excited to welcome Manoj Ampolu as a speaker at #PyConfHyd2026 In his session, Manoj will share practical insights on building scalable, reliable & maintainable data workflows for real-world systems. 🎟️Tickets are selling fast, grab yours now! 🔗2026.pyconfhyd.org/tickets

🎉 We’re excited to welcome Karthikeyan VK as a Speaker at #PyConfHyd2026 In his session, you can explore how Apache Ray enables developers to seamlessly distribute computation, accelerate training & build production-grade ML systems. 🎟️Secure your spot: 2026.pyconfhyd.org/tickets

🎉 We’re excited to welcome Anand S as a Speaker at #PyConfHyd2026. In his session, you can explore how learners approach Python, what works, what doesn’t and how you can make learning more effective & engaging. 🎟️ Don't miss it, grab your ticket now! 🔗2026.pyconfhyd.org/tickets

🎉 We’re excited to welcome @soumendrak_ as a Speaker at #PyConfHyd2026. His talk will highlight practical design approaches for building an SDK that enhances monitoring, troubleshooting and performance. 🎟️ Don't miss, grab your ticket now! 🔗 2026.pyconfhyd.org/tickets

🎉 We’re excited to welcome Benjamin & Ritesh as our speakers at #PyConfHyd2026 Their talk will cover multilingual capabilities, natural language understanding techniques to create more dynamic & inclusive conversational experiences. 🎟️ Grab your ticket: 2026.pyconfhyd.org/tickets

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🎉 We’re excited to welcome @atul1b as a Speaker at #PyConfHyd2026 The talk will highlight important changes, improvements and best practices to help developers upgrade confidently and avoid common pitfalls. 🎟️Book your ticket now! 🔗 2026.pyconfhyd.org/tickets

🎉 We’re delighted to welcome @EPAMSystems as the Gold Sponsor for PyConfHyd2026. A global leader in digital transformation and product engineering, EPAM builds impactful digital platforms worldwide. 🙏A big thank you for your support. 🔗More details: 2026.pyconfhyd.org/blogs/epam-gol…

💼 The #PyConfHyd2026 Job Board is now LIVE! Share your openings: tinyurl.com/PyConfHyd2026-… Explore openings: 2026.pyconfhyd.org/job-board Also, don’t miss attending the conference - a place to network & unlock opportunities in person. Grab your ticket now: 2026.pyconfhyd.org/tickets

🎉 We’re excited to welcome Sonu Kumar as a Workshop Speaker at #PyConfHyd2026. In his session, you will explore how to design smarter, context-aware AI agents & what it takes to move from demos to reliable real-world deployment. 🎟️ Grab your ticket now: 2026.pyconfhyd.org/tickets

🎉 We're delighted to welcome @Straive_ as a Gold Sponsor for #PyConfHyd2026. Straive operationalizes Data Analytics & AI for global enterprises, integrating AI into core workflows to drive real business impact. 🙏Thank you for supporting us! Read more: 2026.pyconfhyd.org/blogs/straive-…

🎉We’re excited to welcome ASBL as the Platinum Sponsor for #PyConfHyd2026! A tech-first real estate company redefining how homes are built in India, ASBL’s support helps power an impactful community experience. 🙏Thanks for sponsoring us! ! 📖Read more: tinyurl.com/Sponsor-ASBL

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🧑‍💻 Thinking about attending #PyConfHyd2026? Here’s why you should. It’s a true community experience - connect with fellow Pythonistas, showcase your work, and learn hands-on with direct access to speakers. 🎟️ Tickets are moving fast, don’t miss out! 🔗 2026.pyconfhyd.org/tickets

⏰ CFP closes today! This is the last day to submit your #PyConfHyd2026 talk or workshop proposal. Don’t let your idea stay in draft, let’s get it on the schedule. 👉 tinyurl.com/PyConfHyd-CFP-… #CFP #Deadline #1DayToGo #TechEvent #PythonCommunity #TechCommunity #HyderabadTech