Dashboard Questions Topics Companies Sheets

Data Structures & Algorithms

Practice 3,374+ coding problems from top companies. Master DSA concepts and ace your interviews.

3,374

Problems

840

Easy

1762

Medium

772

Hard

Difficulty

All3374 Easy840 Medium1762 Hard772

Title	Solve	Difficulty	Companies	Topics
1201. Ugly Number III	Solve	Medium	American Express	Binary Search Combinatorics+2
1202. Smallest String With Swaps	Solve	Medium	Amazon+3	Array Breadth-First Search+5
1203. Sort Items by Groups Respecting Dependencies	Solve	Hard	Amazon	Breadth-First Search Depth-First Search+2
1204. Last Person to Fit in the Bus	Solve	Medium	Amazon	Database
1205. Monthly Transactions II	Solve	Medium	Wish	Database
1206. Design Skiplist	Solve	Hard	eBay+5	Design Linked List
1207. Unique Number of Occurrences	Solve	Easy	Adobe+5	Array Hash Table
1208. Get Equal Substrings Within Budget	Solve	Medium	IBM+1	Binary Search Prefix Sum+2
1209. Remove All Adjacent Duplicates in String II	Solve	Medium	Amazon+7	Stack String
1210. Minimum Moves to Reach Target with Rotations	Solve	Hard	Kakao	Array Breadth-First Search+1
1211. Queries Quality and Percentage	Solve	Easy	Amazon+1	Database
1212. Team Scores in Football Tournament	Solve	Medium	Wayfair	Database
1213. Intersection of Three Sorted Arrays	Solve	Easy	Facebook	Array Binary Search+2
1214. Two Sum BSTs	Solve	Medium	Amazon	Binary Search Binary Search Tree+5
1215. Stepping Numbers	Solve	Medium	Epic Systems	Backtracking Breadth-First Search+1
1216. Valid Palindrome III	Solve	Hard	Amazon+1	Dynamic Programming String
1217. Minimum Cost to Move Chips to The Same Position	Solve	Easy	Adobe+1	Array Greedy+1
1218. Longest Arithmetic Subsequence of Given Difference	Solve	Medium	Facebook+2	Array Dynamic Programming+1
1219. Path with Maximum Gold	Solve	Medium	TikTok	Array Backtracking+1
1220. Count Vowels Permutation	Solve	Hard	Amazon+2	Dynamic Programming
1221. Split a String in Balanced Strings	Solve	Easy	Adobe+3	Counting Greedy+1
1222. Queens That Can Attack the King	Solve	Medium	Media.Net	Array Matrix+1
1223. Dice Roll Simulation	Solve	Hard	Akuna Capital	Array Dynamic Programming
1224. Maximum Equal Frequency	Solve	Hard	American Express	Array Hash Table
1225. Report Contiguous Dates	Solve	Hard	Facebook	Database
1226. The Dining Philosophers	Solve	Medium	-	Concurrency
1227. Airplane Seat Assignment Probability	Solve	Medium	Microstrategy	Brainteaser Dynamic Programming+2
1228. Missing Number In Arithmetic Progression	Solve	Easy	Adobe+4	Array Math
1229. Meeting Scheduler	Solve	Medium	Adobe+8	Array Sorting+1
1230. Toss Strange Coins	Solve	Medium	Twitch	Array Dynamic Programming+2
1231. Divide Chocolate	Solve	Hard	Google+1	Array Binary Search
1232. Check If It Is a Straight Line	Solve	Easy	Accenture+3	Array Geometry+1
1233. Remove Sub-Folders from the Filesystem	Solve	Medium	Amazon+1	Array Depth-First Search+2
1234. Replace the Substring for Balanced String	Solve	Medium	Accolite+1	Sliding Window String
1235. Maximum Profit in Job Scheduling	Solve	Hard	Adobe+18	Array Binary Search+2
1236. Web Crawler	Solve	Medium	Bloomberg+2	Breadth-First Search Depth-First Search+2
1237. Find Positive Integer Solution for a Given Equation	Solve	Medium	Google	Binary Search Interactive+2
1238. Circular Permutation in Binary Representation	Solve	Medium	Walmart	Backtracking Bit Manipulation+1
1239. Maximum Length of a Concatenated String with Unique Characters	Solve	Medium	Adobe+5	Array Backtracking+2
1240. Tiling a Rectangle with the Fewest Squares	Solve	Hard	Google	Backtracking
1241. Number of Comments per Post	Solve	Easy	Facebook	Database
1242. Web Crawler Multithreaded	Solve	Medium	-	Breadth-First Search Concurrency+1
1243. Array Transformation	Solve	Easy	Virtu Financial	Array Simulation
1244. Design A Leaderboard	Solve	Medium	Amazon+4	Design Hash Table+1
1245. Tree Diameter	Solve	Medium	Facebook+2	Breadth-First Search Depth-First Search+3
1246. Palindrome Removal	Solve	Hard	Microsoft	Array Dynamic Programming
1247. Minimum Swaps to Make Strings Equal	Solve	Medium	JPMorgan and Chase	Greedy Math+1
1248. Count Number of Nice Subarrays	Solve	Medium	Adobe+3	Array Hash Table+3
1249. Minimum Remove to Make Valid Parentheses	Solve	Medium	Adobe+6	Stack String
1250. Check If It Is a Good Array	Solve	Hard	Dropbox	Array Math+1