Explore Problem Sets

Blind 75

Classic leetcode-style problems.

That's My Quant

Collection of problems from Jane Street, Citadel, and more.

Engineering 101

Curated hardware + firmware problems from AMD, Tesla, and more.

All Problems

	Career	Companies	Topics
Two Sum Easy	Software Engineer	Amazon+ 19 more	ArrayHash Table
Regular Expression Matching Hard	Software Engineer	Facebook+ 6 more	StringDynamic Programming+1
Same Tree Easy	Software Engineer	Amazon+ 3 more	TreeDepth-first Search
Minimum Cost to Merge Stones Hard	Software Engineer	Amazon	Dynamic Programming
Grid Illumination Hard	Software Engineer	Dropbox	Hash Table
Check If Word Is Valid After Substitutions Medium	Software Engineer	Nutanix	StringStack
Max Consecutive Ones III Medium	Software Engineer	Facebook+ 2 more	Two PointersSliding Window
Maximize Sum Of Array After K Negations Easy	Software Engineer	Amazon	Greedy
Minimum Domino Rotations For Equal Row Medium	Software Engineer	Google	ArrayGreedy
Construct Binary Search Tree from Preorder Traversal Medium	Software Engineer	Amazon+ 1 more	Tree

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