The 50 most upvoted, high-frequency coding problems curated for technical interviews. Free, no account required.
The Top 50 Liked Problems is a curated collection of the most upvoted and frequently tested coding challenges. These problems span key algorithmic patterns and data structures most commonly evaluated in software engineering interviews at leading tech companies.
The Top 50 list is curated based on community upvotes and frequency of appearance in technical interviews. These problems represent the highest-impact questions that consistently appear across software engineering interviews at top tech companies.
The Blind 75 is a fixed curated list focused on breadth across all interview patterns. The Top 50 is dynamically curated based on community ratings and interview frequency — it may overlap with Blind 75 but prioritizes problems with the highest return on investment.
Yes! All Top 50 problems are free. You can run and verify your code in Python, JavaScript, TypeScript, C++, or Java directly in your browser without creating an account.