# 👽 Verifying an Alien Dictionary (LeetCode 953)
Imagine you're interviewing on another planet. 🌎➡️🛸 The aliens use the same English lowercase letters ( a-z ), but their alphabet order is completely …
Open Source
⚑ Report a ProblemLatest Open Source news from Tech News
All topics
AI
agents
ai
api
architecture
automation
aws
beginners
career
claude
database
devchallenge
devops
javascript
linux
llm
machinelearning
mcp
opensource
performance
productivity
programming
python
react
security
showdev
softwareengineering
tutorial
typescript
webdev
🚀 LeetCode 329: Longest Increasing Path in a Matrix (DFS + Memoization) | Easy Explanation
One of the most common mistakes while solving graph problems on matrices is accidentally turning an O(m*n) problem into exponential recursion 😅 This p…
Sliding Window: The Force Awakens – Detect the Pattern and Never Get Stuck Again
The Quest Begins (The “Why”) I still remember the first time I faced a “minimum size subarray sum” question in an interview. The problem stared back a…
🚀 BFS: The Jedi Mind Trick for Graph Traversal (Why It’s More Than Just a Queue)
The Quest Begins (The “Why”) I still remember the first time I stared at a whiteboard interview question that asked for the shortest number of moves a…
How Constraints Changed the Way I Think About Algorithms
Over the past couple of years, I've spent a lot of time preparing for software engineering interviews. Like many developers, I started my Data Structu…
Segment Trees: The “Divide‑and‑Conquer” Trick That Actually Makes Sense
Segment Trees: The “Divide‑and‑Conquer” Trick That Actually Makes Sense Quick context (why you're writing this) I remember the first time I saw a segm…
The Fastest Set Is Often Not a Set: 4050 Duplicate-Detection Benchmarks
Duplicate detection looks solved: keep a hash set, skip what you have already seen. A benchmark suite of 4050 measurements across 480 workloads says t…
DSA Application in Real Life: How Git Diff Works: LCS Intuition, Myers Algorithm, and Real Code Changes
The Algorithm Hiding Behind git diff You've run git diff hundreds of times. Red lines. Green lines. Done. But have you ever stopped and asked — what a…
The Protocol Behind Python's Containers
Lists, tuples, dicts, and sets look like four different things. Underneath, they share the same idea: they all implement a small set of protocols, and…
🚀 How to Solve Arrays and Hashing Problems in Data Structure?
Arrays and Hashing are among the most important topics in Data Structures & Algorithms (DSA) and are frequently asked in coding interviews at comp…
Structure Before Bytes: How Metarc Beats tar+zstd on Real Code
tar+zstd is very hard to beat. So I stopped trying to beat it as a byte compressor. Instead, I tried something else: compress the structure first, the…
Data Management Systems: From Transactional Databases to Analytical Architectures
Data is no longer treated as a byproduct of business operations and has become one of the most valuable organizational assets. Every interaction on a …