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 176-200 of 250 matching problems in NeetCode 250.

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All topics 0-1 Knapsack Algorithm X Array Backtracking Bellman–Ford Algorithm Bidirectional Search Binary Lifting Binary Search Binary Search Tree Binary Tree Bit Manipulation Bitmask Borůvka's Algorithm Boyer–Moore Majority Vote Algorithm Bracket Sequences Breadth-First Search Brute-Force Search Bubble Sort

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Array141Dynamic Programming55String53

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

Title	Difficulty	Topics
572. Subtree of Another Tree Open source	Easy	TreeDepth-First SearchString Matching+2 more
621. Task Scheduler Open source	Medium	ArrayHash TableGreedy+3 more
622. Design Circular Queue Open source	Medium	ArrayLinked ListDesign+1 more
647. Palindromic Substrings Open source	Medium	Two PointersStringDynamic Programming
649. Dota2 Senate Open source	Medium	StringGreedyQueue
658. Find K Closest Elements Open source	Medium	ArrayTwo PointersBinary Search+3 more
678. Valid Parenthesis String Open source	Medium	StringDynamic ProgrammingStack+2 more
680. Valid Palindrome II Open source	Easy	Two PointersStringGreedy
682. Baseball Game Open source	Easy	ArrayStackSimulation
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
698. Partition to K Equal Sum Subsets Open source	Medium	ArrayDynamic ProgrammingBacktracking+3 more
701. Insert into a Binary Search Tree Open source	Medium	TreeBinary Search TreeBinary Tree
703. Kth Largest Element in a Stream Open source	Easy	TreeDesignBinary Search Tree+3 more
704. Binary Search Open source	Easy	ArrayBinary Search
705. Design HashSet Open source	Easy	ArrayHash TableLinked List+2 more
706. Design HashMap Open source	Easy	ArrayHash TableLinked List+2 more
721. Accounts Merge Open source	Medium	ArrayHash TableString+4 more
735. Asteroid Collision Open source	Medium	ArrayStackSimulation
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
752. Open the Lock Open source	Medium	ArrayHash TableString+2 more
763. Partition Labels Open source	Medium	Hash TableTwo PointersString+1 more
767. Reorganize String Open source	Medium	Hash TableStringGreedy+3 more