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
1228. Missing Number In Arithmetic Progression	Solve	Easy	Adobe+4	Array Math
1232. Check If It Is a Straight Line	Solve	Easy	Accenture+3	Array Geometry+1
1241. Number of Comments per Post	Solve	Easy	Facebook	Database
1243. Array Transformation	Solve	Easy	Virtu Financial	Array Simulation
1251. Average Selling Price	Solve	Easy	Adobe+3	Database
1252. Cells with Odd Values in a Matrix	Solve	Easy	Google	Array Math+1
1260. Shift 2D Grid	Solve	Easy	Bloomberg	Array Matrix+1
1266. Minimum Time Visiting All Points	Solve	Easy	Amazon+4	Array Geometry+1
1271. Hexspeak	Solve	Easy	Virtu Financial	Math String
1275. Find Winner on a Tic Tac Toe Game	Solve	Easy	Amazon+4	Array Hash Table+2
1279. Traffic Light Controlled Intersection	Solve	Easy	-	Concurrency
1280. Students and Examinations	Solve	Easy	Amazon+2	Database
1281. Subtract the Product and Sum of Digits of an Integer	Solve	Easy	Uber	Math
1287. Element Appearing More Than 25% In Sorted Array	Solve	Easy	Facebook+1	Array
1290. Convert Binary Number in a Linked List to Integer	Solve	Easy	Amazon+1	Linked List Math
1294. Weather Type in Each Country	Solve	Easy	Point72	Database
1295. Find Numbers with Even Number of Digits	Solve	Easy	Amazon	Array Math
1299. Replace Elements with Greatest Element on Right Side	Solve	Easy	Facebook	Array
1303. Find the Team Size	Solve	Easy	Amazon	Database
1304. Find N Unique Integers Sum up to Zero	Solve	Easy	Microsoft	Array Math
1309. Decrypt String from Alphabet to Integer Mapping	Solve	Easy	Quip(Salesforce)	String
1313. Decompress Run-Length Encoded List	Solve	Easy	Amazon+1	Array
1317. Convert Integer to the Sum of Two No-Zero Integers	Solve	Easy	HRT	Math
1322. Ads Performance	Solve	Easy	Facebook	Database
1323. Maximum 69 Number	Solve	Easy	HRT	Greedy Math
1327. List the Products Ordered in a Period	Solve	Easy	Amazon	Database
1331. Rank Transform of an Array	Solve	Easy	Facebook+1	Array Hash Table+1
1332. Remove Palindromic Subsequences	Solve	Easy	Bloomberg	String Two Pointers
1337. The K Weakest Rows in a Matrix	Solve	Easy	Amazon	Array Binary Search+3
1342. Number of Steps to Reduce a Number to Zero	Solve	Easy	Apple+2	Bit Manipulation Math
1346. Check If N and Its Double Exist	Solve	Easy	Google	Array Binary Search+3
1350. Students With Invalid Departments	Solve	Easy	Amazon	Database
1351. Count Negative Numbers in a Sorted Matrix	Solve	Easy	Amazon+1	Array Binary Search+1
1356. Sort Integers by The Number of 1 Bits	Solve	Easy	Accenture+6	Array Bit Manipulation+2
1360. Number of Days Between Two Dates	Solve	Easy	Amazon	Math String
1365. How Many Numbers Are Smaller Than the Current Number	Solve	Easy	Amazon+1	Array Counting+2
1370. Increasing Decreasing String	Solve	Easy	Akuna Capital+1	Counting Hash Table+1
1374. Generate a String With Characters That Have Odd Counts	Solve	Easy	Microsoft	String
1378. Replace Employee ID With The Unique Identifier	Solve	Easy	Adobe+3	Database
1379. Find a Corresponding Node of a Binary Tree in a Clone of That Tree	Solve	Easy	Amazon	Binary Tree Breadth-First Search+2
1380. Lucky Numbers in a Matrix	Solve	Easy	Apple	Array Matrix
1385. Find the Distance Value Between Two Arrays	Solve	Easy	Uber	Array Binary Search+2
1389. Create Target Array in the Given Order	Solve	Easy	Amazon+2	Array Simulation
1394. Find Lucky Integer in an Array	Solve	Easy	Microsoft	Array Counting+1
1399. Count Largest Group	Solve	Easy	Mercari	Hash Table Math
1403. Minimum Subsequence in Non-Increasing Order	Solve	Easy	Amazon+1	Array Greedy+1
1407. Top Travellers	Solve	Easy	Point72	Database
1408. String Matching in an Array	Solve	Easy	Amazon+1	Array String+1
1413. Minimum Value to Get Positive Step by Step Sum	Solve	Easy	Amazon+1	Array Prefix Sum
1417. Reformat The String	Solve	Easy	Google+1	String