Love Babbar
The DSA sheet by Love Babbar is designed to cover almost every concept in Data Structures and Algorithms. It is an excellent resource for mastering DSA, succeeding in technical interviews at companies like Amazon, Microsoft, and Google, and improving programming skills in languages such as C++, Java, or Python. We acknowledge and appreciate Love Babbar's efforts in creating this detailed guide for the developer community.
Also known as DSA 450, 450 DSA Sheet, Love Babbar 450 Questions.
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There is no PDF here, and you do not need one. All 445 problems are listed in full on this page, free and without an account — and unlike a PDF the list remembers what you have ticked off, so you are not re-reading a static file to work out where you stopped. Use your browser's print view if you want it on paper.
Yes — same sheet, different name. It is also known as DSA 450, 450 DSA Sheet, Love Babbar 450 Questions. Whichever name you searched for, this is the tracker for it.
Tick a problem on this page and it stays ticked. Progress saves in your browser straight away with no account, and the counts update per section so you can see which parts of Love Babbar Sheet you have actually covered. Signing in with Google syncs it across devices.
445, grouped into 15 topics. Every one is listed on this page and tickable as you solve it.
At roughly 25 minutes a problem — reading it, solving it and writing the approach down — 445 problems is about 185 hours, or 19 weeks at ten hours a week. Treat that as a planning figure rather than a promise; the first pass through an unfamiliar topic is always slower.
Yes, completely, and no account is needed. There is no paid tier and nothing is held back — the sheet itself is by Love Babbar, and this is a free tracker for it.
Finish one. Sheets overlap heavily, so working several in parallel mostly means re-solving the same problems while never completing a full topic sweep. If you are not sure this is the right one for the time you have, the sheet comparison page puts the options side by side with hour estimates.