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
605. Can Place Flowers	Solve	Easy	Amazon+4	Array Greedy
607. Sales Person	Solve	Easy	Bloomberg+1	Database
610. Triangle Judgement	Solve	Easy	Amazon+1	Database
613. Shortest Distance in a Line	Solve	Easy	-	Database
617. Merge Two Binary Trees	Solve	Easy	Amazon+3	Binary Tree Breadth-First Search+2
619. Biggest Single Number	Solve	Easy	Apple	Database
620. Not Boring Movies	Solve	Easy	Amazon	Database
627. Swap Salary	Solve	Easy	Apple+1	Database
628. Maximum Product of Three Numbers	Solve	Easy	Salesforce	Array Math+1
637. Average of Levels in Binary Tree	Solve	Easy	Amazon+2	Binary Tree Breadth-First Search+2
643. Maximum Average Subarray I	Solve	Easy	Facebook	Array Sliding Window
645. Set Mismatch	Solve	Easy	Adobe	Array Bit Manipulation+2
653. Two Sum IV - Input is a BST	Solve	Easy	Amazon+1	Binary Search Tree Binary Tree+5
657. Robot Return to Origin	Solve	Easy	Amazon+3	Simulation String
661. Image Smoother	Solve	Easy	Amazon+2	Array Matrix
671. Second Minimum Node In a Binary Tree	Solve	Easy	LinkedIn	Binary Tree Depth-First Search+1
674. Longest Continuous Increasing Subsequence	Solve	Easy	Facebook	Array
680. Valid Palindrome II	Solve	Easy	Amazon+6	Greedy String+1
682. Baseball Game	Solve	Easy	Uber	Array Simulation+1
693. Binary Number with Alternating Bits	Solve	Easy	Yahoo	Bit Manipulation
696. Count Binary Substrings	Solve	Easy	Adobe+8	String Two Pointers
697. Degree of an Array	Solve	Easy	Adobe+6	Array Hash Table
700. Search in a Binary Search Tree	Solve	Easy	Amazon	Binary Search Tree Binary Tree+1
703. Kth Largest Element in a Stream	Solve	Easy	Adobe+4	Binary Search Tree Binary Tree+4
704. Binary Search	Solve	Easy	Adobe+8	Array Binary Search
705. Design HashSet	Solve	Easy	Amazon+6	Array Design+3
706. Design HashMap	Solve	Easy	Adobe+26	Array Design+3
709. To Lower Case	Solve	Easy	Amazon	String
717. 1-bit and 2-bit Characters	Solve	Easy	Apple	Array
724. Find Pivot Index	Solve	Easy	Adobe+8	Array Prefix Sum
728. Self Dividing Numbers	Solve	Easy	Adobe+3	Math
733. Flood Fill	Solve	Easy	Adobe+8	Array Breadth-First Search+2
734. Sentence Similarity	Solve	Easy	Facebook+1	Array Hash Table+1
744. Find Smallest Letter Greater Than Target	Solve	Easy	Amazon+2	Array Binary Search
746. Min Cost Climbing Stairs	Solve	Easy	Adobe+9	Array Dynamic Programming
747. Largest Number At Least Twice of Others	Solve	Easy	Google	Array Sorting
748. Shortest Completing Word	Solve	Easy	Google	Array Hash Table+1
760. Find Anagram Mappings	Solve	Easy	Google	Array Hash Table
762. Prime Number of Set Bits in Binary Representation	Solve	Easy	Amazon	Bit Manipulation Math
766. Toeplitz Matrix	Solve	Easy	Bloomberg+1	Array Matrix
771. Jewels and Stones	Solve	Easy	Adobe+2	Hash Table String
783. Minimum Distance Between BST Nodes	Solve	Easy	Bloomberg+3	Binary Search Tree Binary Tree+3
796. Rotate String	Solve	Easy	Apple+4	String String Matching
800. Similar RGB Color	Solve	Easy	Google	Enumeration Math+1
804. Unique Morse Code Words	Solve	Easy	Square	Array Hash Table+1
806. Number of Lines To Write String	Solve	Easy	-	Array String
812. Largest Triangle Area	Solve	Easy	Google	Array Geometry+1
819. Most Common Word	Solve	Easy	Amazon	Array Counting+2
821. Shortest Distance to a Character	Solve	Easy	Apple+1	Array String+1
824. Goat Latin	Solve	Easy	Facebook	String