Practice Problems
Each problem teaches a transferable pattern — the kind that shows up again and again in technical interviews at top companies.
15problems
11patterns covered
30+companies represented
Free Starter — 5 problems
Early Access — 10 problems
- 6.Best Time to Buy and Sell StockAmazonGoldman SachsGoogleTracking MinimumEasy🔒
- 7.Merge Two Sorted ListsGoogleAmazonMicrosoftLinked ListEasy🔒
- 8.Binary SearchGoogleAmazonMetaBinary SearchEasy🔒
- 9.Search Insert PositionGoogleAmazonBinary SearchEasy🔒
- 10.Move ZeroesMetaGoogleAmazonTwo PointersEasy🔒
- 11.Maximum SubarrayAmazonGoogleAppleKadane's AlgorithmMedium🔒
- 12.Longest Substring Without Repeating CharactersAmazonGoogleBloombergSliding WindowMedium🔒
- 13.Maximum Average Subarray IAmazonGoogleSliding WindowEasy🔒
- 14.Min StackAmazonGoogleBloombergStackMedium🔒
- 15.Invert Binary TreeGoogleAmazonAppleTree TraversalEasy🔒
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Sliding WindowBinary SearchLinked ListKadane'sTree Traversal
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