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
564. Find the Closest Palindrome	Solve	Hard	Amazon+5	Math String
568. Maximum Vacation Days	Solve	Hard	Microsoft	Array Dynamic Programming+1
569. Median Employee Salary	Solve	Hard	Google	Database
571. Find Median Given Frequency of Numbers	Solve	Hard	Pinterest	Database
579. Find Cumulative Salary of an Employee	Solve	Hard	Amazon	Database
587. Erect the Fence	Solve	Hard	Google	Array Geometry+1
588. Design In-Memory File System	Solve	Hard	Amazon+5	Design Hash Table+3
591. Tag Validator	Solve	Hard	Airbnb+1	Stack String
600. Non-negative Integers without Consecutive Ones	Solve	Hard	Pocket Gems	Dynamic Programming
601. Human Traffic of Stadium	Solve	Hard	Amazon	Database
615. Average Salary: Departments VS Company	Solve	Hard	-	Database
618. Students Report By Geography	Solve	Hard	Amazon	Database
629. K Inverse Pairs Array	Solve	Hard	Bytedance+1	Dynamic Programming
630. Course Schedule III	Solve	Hard	Bloomberg	Array Greedy+2
631. Design Excel Sum Formula	Solve	Hard	Google+1	Array Design+3
632. Smallest Range Covering Elements from K Lists	Solve	Hard	Adobe+8	Array Greedy+4
639. Decode Ways II	Solve	Hard	Microsoft	Dynamic Programming String
642. Design Search Autocomplete System	Solve	Hard	Amazon+5	Data Stream Depth-First Search+5
644. Maximum Average Subarray II	Solve	Hard	Google	Array Binary Search+1
656. Coin Path	Solve	Hard	Google	Array Dynamic Programming
660. Remove 9	Solve	Hard	Google	Math
664. Strange Printer	Solve	Hard	Google+2	Dynamic Programming String
668. Kth Smallest Number in Multiplication Table	Solve	Hard	Rubrik	Binary Search Math
675. Cut Off Trees for Golf Event	Solve	Hard	Amazon+1	Array Breadth-First Search+2
679. 24 Game	Solve	Hard	Google+1	Array Backtracking+1
683. K Empty Slots	Solve	Hard	Google+1	Array Binary Indexed Tree+6
685. Redundant Connection II	Solve	Hard	Amazon	Breadth-First Search Depth-First Search+2
689. Maximum Sum of 3 Non-Overlapping Subarrays	Solve	Hard	Facebook	Array Dynamic Programming
691. Stickers to Spell Word	Solve	Hard	Facebook	Array Backtracking+4
699. Falling Squares	Solve	Hard	Square+1	Array Ordered Set+1
710. Random Pick with Blacklist	Solve	Hard	Amazon+2	Array Binary Search+4
711. Number of Distinct Islands II	Solve	Hard	Amazon+1	Breadth-First Search Depth-First Search+3
715. Range Module	Solve	Hard	Amazon+6	Design Ordered Set+1
716. Max Stack	Solve	Hard	Amazon+6	Design Doubly-Linked List+3
719. Find K-th Smallest Pair Distance	Solve	Hard	Facebook	Array Binary Search+2
726. Number of Atoms	Solve	Hard	Amazon+5	Hash Table Sorting+2
727. Minimum Window Subsequence	Solve	Hard	Google	Dynamic Programming Sliding Window+1
730. Count Different Palindromic Subsequences	Solve	Hard	Apple+3	Dynamic Programming String
732. My Calendar III	Solve	Hard	Amazon+1	Binary Search Design+3
736. Parse Lisp Expression	Solve	Hard	Affirm	Hash Table Recursion+2
741. Cherry Pickup	Solve	Hard	Akuna Capital+7	Array Dynamic Programming+1
745. Prefix and Suffix Search	Solve	Hard	Facebook+2	Array Design+3
749. Contain Virus	Solve	Hard	Accolite+2	Array Breadth-First Search+3
753. Cracking the Safe	Solve	Hard	Google+1	Depth-First Search Eulerian Circuit+1
757. Set Intersection Size At Least Two	Solve	Hard	Drawbridge+1	Array Greedy+1
759. Employee Free Time	Solve	Hard	Airbnb+7	Array Heap (Priority Queue)+1
761. Special Binary String	Solve	Hard	Coursera+1	Recursion String
765. Couples Holding Hands	Solve	Hard	Bloomberg	Breadth-First Search Depth-First Search+3
768. Max Chunks To Make Sorted II	Solve	Hard	Adobe+6	Array Greedy+3
770. Basic Calculator IV	Solve	Hard	Adobe+1	Hash Table Math+3