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 126-150 of 150 matching problems in NeetCode 150.

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All topics 0-1 Knapsack Algorithm X Array Backtracking Bidirectional Search Binary Lifting Binary Search Binary Search Tree Binary Tree Bit Manipulation Borůvka's Algorithm Bracket Sequences Breadth-First Search Brute-Force Search Bucket Sort Combinatorics Complete Knapsack Counting

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Array80Dynamic Programming35String33

These are the topics showing up most often in your current queue.

Title	Difficulty	Topics
647. Palindromic Substrings Open source	Medium	Two PointersStringDynamic Programming
678. Valid Parenthesis String Open source	Medium	StringDynamic ProgrammingStack+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
703. Kth Largest Element in a Stream Open source	Easy	TreeDesignBinary Search Tree+3 more
704. Binary Search Open source	Easy	ArrayBinary Search
739. Daily Temperatures Open source	Medium	ArrayStackMonotonic Stack
743. Network Delay Time Open source	Medium	Depth-First SearchBreadth-First SearchGraph Theory+3 more
746. Min Cost Climbing Stairs Open source	Easy	ArrayDynamic Programming
763. Partition Labels Open source	Medium	Hash TableTwo PointersString+1 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
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
981. Time Based Key-Value Store Open source	Medium	Hash TableStringBinary Search+1 more
994. Rotting Oranges Open source	Medium	ArrayBreadth-First SearchMatrix
1046. Last Stone Weight Open source	Easy	ArrayHeap (Priority Queue)
1143. Longest Common Subsequence Open source	Medium	StringDynamic ProgrammingLongest Common Subsequence
1448. Count Good Nodes in Binary Tree Open source	Medium	TreeDepth-First SearchBreadth-First Search+1 more
1584. Min Cost to Connect All Points Open source	Medium	ArrayUnion-FindGraph Theory+4 more
1851. Minimum Interval to Include Each Query Open source	Hard	ArrayBinary SearchSweep Line+2 more
1899. Merge Triplets to Form Target Triplet Open source	Medium	ArrayGreedy
2013. Detect Squares Open source	Medium	ArrayHash TableDesign+2 more