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 51-75 of 80 matching problems in NeetCode 150.

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Array80Dynamic Programming35String33

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Title	Difficulty	Topics
286. Walls and Gates Open sourcePremium	Medium	ArrayBreadth-First SearchMatrix
287. Find the Duplicate Number Open source	Medium	ArrayTwo PointersBinary Search+3 more
300. Longest Increasing Subsequence Open source	Medium	ArrayBinary SearchDynamic Programming+1 more
309. Best Time to Buy and Sell Stock with Cooldown Open source	Medium	ArrayDynamic Programming
312. Burst Balloons Open source	Hard	ArrayDynamic Programming
322. Coin Change Open source	Medium	ArrayDynamic ProgrammingBreadth-First Search+2 more
329. Longest Increasing Path in a Matrix Open source	Hard	ArrayDynamic ProgrammingDepth-First Search+6 more
332. Reconstruct Itinerary Open source	Hard	ArrayStringDepth-First Search+6 more
347. Top K Frequent Elements Open source	Medium	ArrayHash TableDivide and Conquer+5 more
416. Partition Equal Subset Sum Open source	Medium	ArrayDynamic ProgrammingKnapsack Problem+1 more
417. Pacific Atlantic Water Flow Open source	Medium	ArrayDepth-First SearchBreadth-First Search+1 more
435. Non-overlapping Intervals Open source	Medium	ArrayDynamic ProgrammingGreedy+1 more
494. Target Sum Open source	Medium	ArrayDynamic ProgrammingBacktracking+2 more
518. Coin Change II Open source	Medium	ArrayDynamic ProgrammingKnapsack Problem+1 more
621. Task Scheduler Open source	Medium	ArrayHash TableGreedy+3 more
695. Max Area of Island Open source	Medium	ArrayDepth-First SearchBreadth-First Search+2 more
704. Binary Search Open source	Easy	ArrayBinary Search
739. Daily Temperatures Open source	Medium	ArrayStackMonotonic Stack
746. Min Cost Climbing Stairs Open source	Easy	ArrayDynamic Programming
778. Swim in Rising Water Open source	Hard	ArrayBinary SearchDepth-First Search+6 more
846. Hand of Straights Open source	Medium	ArrayHash TableGreedy+1 more
853. Car Fleet Open source	Medium	ArrayStackSorting+1 more
875. Koko Eating Bananas Open source	Medium	ArrayBinary Search
973. K Closest Points to Origin Open source	Medium	ArrayMathDivide and Conquer+5 more
994. Rotting Oranges Open source	Medium	ArrayBreadth-First SearchMatrix