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 151-175 of 250 matching problems.

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All topics Algorithm X Array Backtracking Bidirectional Search Binary Indexed Tree Binary Lifting Binary Search Binary Search Tree Binary Tree Bit Manipulation Boyer–Moore Majority Vote Algorithm Boyer–Moore String-Search Algorithm Bracket Sequences Breadth-First Search Brute-Force Search Bubble Sort Bucket Sort Combinatorics

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

Title	Difficulty	Topics
151. Reverse Words in a String Open source	Medium	Two PointersString
152. Maximum Product Subarray Open source	Medium	ArrayDynamic Programming
153. Find Minimum in Rotated Sorted Array Open source	Medium	ArrayBinary Search
154. Find Minimum in Rotated Sorted Array II Open source	Hard	ArrayBinary Search
155. Min Stack Open source	Medium	StackDesign
156. Binary Tree Upside Down Open sourcePremium	Medium	TreeDepth-First SearchBinary Tree
157. Read N Characters Given Read4 Open sourcePremium	Easy	ArraySimulationInteractive
158. Read N Characters Given read4 II - Call Multiple Times Open sourcePremium	Hard	ArraySimulationInteractive
159. Longest Substring with At Most Two Distinct Characters Open sourcePremium	Medium	Hash TableStringSliding Window
160. Intersection of Two Linked Lists Open source	Easy	Hash TableLinked ListTwo Pointers
161. One Edit Distance Open sourcePremium	Medium	Two PointersString
162. Find Peak Element Open source	Medium	ArrayBinary Search
163. Missing Ranges Open sourcePremium	Easy	Array
164. Maximum Gap Open source	Medium	ArraySortingBucket Sort+2 more
165. Compare Version Numbers Open source	Medium	Two PointersString
166. Fraction to Recurring Decimal Open source	Medium	Hash TableMathString
167. Two Sum II - Input Array Is Sorted Open source	Medium	ArrayTwo PointersBinary Search
168. Excel Sheet Column Title Open source	Easy	MathString
169. Majority Element Open source	Easy	ArrayHash TableDivide and Conquer+3 more
170. Two Sum III - Data structure design Open sourcePremium	Easy	ArrayHash TableTwo Pointers+2 more
171. Excel Sheet Column Number Open source	Easy	MathString
172. Factorial Trailing Zeroes Open source	Medium	Math
173. Binary Search Tree Iterator Open source	Medium	StackTreeDesign+3 more
174. Dungeon Game Open source	Hard	ArrayDynamic ProgrammingMatrix
175. Combine Two Tables Open source	Easy	Database