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 26-47 of 47 matching problems in SDE Sheet.

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All topics 0-1 Knapsack Array Backtracking Binary Search Binary Search Tree Binary Tree Boyer–Moore Majority Vote Algorithm Breadth-First Search Brute-Force Search Bucket Sort Combinatorics Complete Knapsack Counting Depth-First Search Directed Acyclic Graph Divide and Conquer DP on Trees Dynamic Programming

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Array30Dynamic Programming14Depth-First Search10

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

Title	Difficulty	Topics
133. Clone Graph Open source	Medium	Hash TableDepth-First SearchBreadth-First Search+1 more
139. Word Break Open source	Medium	ArrayHash TableString+4 more
141. Linked List Cycle Open source	Easy	Hash TableLinked ListTwo Pointers+1 more
152. Maximum Product Subarray Open source	Medium	ArrayDynamic Programming
153. Find Minimum in Rotated Sorted Array Open source	Medium	ArrayBinary Search
169. Majority Element Open source	Easy	ArrayHash TableDivide and Conquer+3 more
198. House Robber Open source	Medium	ArrayDynamic Programming
199. Binary Tree Right Side View Open source	Medium	TreeDepth-First SearchBreadth-First Search+1 more
200. Number of Islands Open source	Medium	ArrayDepth-First SearchBreadth-First Search+2 more
206. Reverse Linked List Open source	Easy	Linked ListRecursion
207. Course Schedule Open source	Medium	Depth-First SearchBreadth-First SearchGraph Theory+2 more
215. Kth Largest Element in an Array Open source	Medium	ArrayDivide and ConquerSorting+2 more
217. Contains Duplicate Open source	Easy	ArrayHash TableSorting
230. Kth Smallest Element in a BST Open source	Medium	TreeDepth-First SearchBinary Search Tree+1 more
238. Product of Array Except Self Open source	Medium	ArrayPrefix Sum
300. Longest Increasing Subsequence Open source	Medium	ArrayBinary SearchDynamic Programming+1 more
322. Coin Change Open source	Medium	ArrayDynamic ProgrammingBreadth-First Search+2 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
543. Diameter of Binary Tree Open source	Easy	TreeDepth-First SearchBinary Tree+1 more
560. Subarray Sum Equals K Open source	Medium	ArrayHash TablePrefix Sum
1143. Longest Common Subsequence Open source	Medium	StringDynamic ProgrammingLongest Common Subsequence