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
1421. NPV Queries	Solve	Easy	Amazon	Database
1422. Maximum Score After Splitting a String	Solve	Easy	Google	Prefix Sum String
1426. Counting Elements	Solve	Easy	DRW	Array Hash Table
1427. Perform String Shifts	Solve	Easy	Goldman Sachs	Array Math+1
1431. Kids With the Greatest Number of Candies	Solve	Easy	Amazon	Array
1435. Create a Session Bar Chart	Solve	Easy	Twitch	Database
1436. Destination City	Solve	Easy	Google+1	Array Hash Table+1
1437. Check If All 1's Are at Least Length K Places Away	Solve	Easy	United Health Group	Array
1446. Consecutive Characters	Solve	Easy	Apple+1	String
1450. Number of Students Doing Homework at a Given Time	Solve	Easy	Yandex	Array
1455. Check If a Word Occurs As a Prefix of Any Word in a Sentence	Solve	Easy	Amazon	String String Matching+1
1460. Make Two Arrays Equal by Reversing Subarrays	Solve	Easy	Facebook	Array Hash Table+1
1464. Maximum Product of Two Elements in an Array	Solve	Easy	Amazon+4	Array Heap (Priority Queue)+1
1469. Find All The Lonely Nodes	Solve	Easy	Microsoft	Binary Tree Breadth-First Search+2
1470. Shuffle the Array	Solve	Easy	Amazon+1	Array
1474. Delete N Nodes After M Nodes of a Linked List	Solve	Easy	Microsoft	Linked List
1475. Final Prices With a Special Discount in a Shop	Solve	Easy	Amazon	Array Monotonic Stack+1
1480. Running Sum of 1d Array	Solve	Easy	Microsoft	Array Prefix Sum
1484. Group Sold Products By The Date	Solve	Easy	Adobe+1	Database
1486. XOR Operation in an Array	Solve	Easy	Bloomberg	Bit Manipulation Math
1491. Average Salary Excluding the Minimum and Maximum Salary	Solve	Easy	Amazon+1	Array Sorting
1495. Friendly Movies Streamed Last Month	Solve	Easy	Amazon	Database
1496. Path Crossing	Solve	Easy	Google	Hash Table String
1502. Can Make Arithmetic Progression From Sequence	Solve	Easy	Amazon+5	Array Sorting
1507. Reformat Date	Solve	Easy	Expedia+2	String
1511. Customer Order Frequency	Solve	Easy	Amazon	Database
1512. Number of Good Pairs	Solve	Easy	Adobe+2	Array Counting+2
1517. Find Users With Valid E-Mails	Solve	Easy	-	Database
1518. Water Bottles	Solve	Easy	Amazon+2	Math Simulation
1523. Count Odd Numbers in an Interval Range	Solve	Easy	Accenture+3	Math
1527. Patients With a Condition	Solve	Easy	-	Database
1528. Shuffle String	Solve	Easy	Google	Array String
1534. Count Good Triplets	Solve	Easy	Google	Array Enumeration
1539. Kth Missing Positive Number	Solve	Easy	Amazon+4	Array Binary Search
1543. Fix Product Name Format	Solve	Easy	-	Database
1544. Make The String Great	Solve	Easy	Adobe+1	Stack String
1550. Three Consecutive Odds	Solve	Easy	DJI	Array
1556. Thousand Separator	Solve	Easy	Uber	String
1560. Most Visited Sector in a Circular Track	Solve	Easy	IBM	Array Simulation
1565. Unique Orders and Customers Per Month	Solve	Easy	Whole Food Market	Database
1566. Detect Pattern of Length M Repeated K or More Times	Solve	Easy	HRT	Array Enumeration
1571. Warehouse Manager	Solve	Easy	Amazon	Database
1572. Matrix Diagonal Sum	Solve	Easy	Amazon+1	Array Matrix
1576. Replace All ?'s to Avoid Consecutive Repeating Characters	Solve	Easy	Microsoft	String
1581. Customer Who Visited but Did Not Make Any Transactions	Solve	Easy	Adobe+3	Database
1582. Special Positions in a Binary Matrix	Solve	Easy	Bloomberg+2	Array Matrix
1587. Bank Account Summary II	Solve	Easy	-	Database
1588. Sum of All Odd Length Subarrays	Solve	Easy	Adobe+2	Array Math+1
1592. Rearrange Spaces Between Words	Solve	Easy	Google	String
1598. Crawler Log Folder	Solve	Easy	Mercari	Array Stack+1