Problem Library

Master these coding challenges to ace your next technical interview. Handpicked problems with personalized spaced repetition.

All tracks Blind 75 NeetCode 150 NeetCode 250 Striver A to Z SDE Sheet

Showing 26-42 of 42 matching problems in NeetCode 250.

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Array141Dynamic Programming55String53

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Title	Difficulty	Topics
332. Reconstruct Itinerary Open source	Hard	ArrayStringDepth-First Search+6 more
337. House Robber III Open source	Medium	Dynamic ProgrammingTreeDepth-First Search+2 more
399. Evaluate Division Open source	Medium	ArrayStringDepth-First Search+6 more
417. Pacific Atlantic Water Flow Open source	Medium	ArrayDepth-First SearchBreadth-First Search+1 more
463. Island Perimeter Open source	Easy	ArrayDepth-First SearchBreadth-First Search+1 more
543. Diameter of Binary Tree Open source	Easy	TreeDepth-First SearchBinary Tree+1 more
572. Subtree of Another Tree Open source	Easy	TreeDepth-First SearchString Matching+2 more
684. Redundant Connection Open source	Medium	Depth-First SearchBreadth-First SearchUnion-Find+1 more
695. Max Area of Island Open source	Medium	ArrayDepth-First SearchBreadth-First Search+2 more
721. Accounts Merge Open source	Medium	ArrayHash TableString+4 more
743. Network Delay Time Open source	Medium	Depth-First SearchBreadth-First SearchGraph Theory+3 more
778. Swim in Rising Water Open source	Hard	ArrayBinary SearchDepth-First Search+6 more
787. Cheapest Flights Within K Stops Open source	Medium	Dynamic ProgrammingDepth-First SearchBreadth-First Search+3 more
1325. Delete Leaves With a Given Value Open source	Medium	TreeDepth-First SearchBinary Tree
1448. Count Good Nodes in Binary Tree Open source	Medium	TreeDepth-First SearchBreadth-First Search+1 more
1462. Course Schedule IV Open source	Medium	Depth-First SearchBreadth-First SearchGraph Theory+1 more
1631. Path With Minimum Effort Open source	Medium	ArrayBinary SearchDepth-First Search+5 more