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
1001. Grid Illumination	Solve	Hard	Dropbox	Array Hash Table
1002. Find Common Characters	Solve	Easy	Amazon	Array Hash Table+1
1003. Check If Word Is Valid After Substitutions	Solve	Medium	Nutanix	Stack String
1004. Max Consecutive Ones III	Solve	Medium	Amazon+6	Array Binary Search+2
1005. Maximize Sum Of Array After K Negations	Solve	Easy	Amazon+1	Array Greedy+1
1006. Clumsy Factorial	Solve	Medium	Amazon+2	Math Simulation+1
1007. Minimum Domino Rotations For Equal Row	Solve	Medium	Google	Array Greedy
1008. Construct Binary Search Tree from Preorder Traversal	Solve	Medium	Amazon+3	Array Binary Search Tree+4
1009. Complement of Base 10 Integer	Solve	Easy	Adobe+1	Bit Manipulation
1010. Pairs of Songs With Total Durations Divisible by 60	Solve	Medium	Amazon+7	Array Counting+1
1011. Capacity To Ship Packages Within D Days	Solve	Medium	Adobe+16	Array Binary Search
1012. Numbers With Repeated Digits	Solve	Hard	Google+2	Dynamic Programming Math
1013. Partition Array Into Three Parts With Equal Sum	Solve	Easy	Google+1	Array Greedy
1014. Best Sightseeing Pair	Solve	Medium	Google	Array Dynamic Programming
1015. Smallest Integer Divisible by K	Solve	Medium	Google	Hash Table Math
1016. Binary String With Substrings Representing 1 To N	Solve	Medium	Amazon+1	String
1017. Convert to Base -2	Solve	Medium	Airbnb	Math
1018. Binary Prefix Divisible By 5	Solve	Easy	-	Array Bit Manipulation
1019. Next Greater Node In Linked List	Solve	Medium	Amazon+1	Array Linked List+2
1020. Number of Enclaves	Solve	Medium	Google	Array Breadth-First Search+3
1021. Remove Outermost Parentheses	Solve	Easy	Microsoft	Stack String
1022. Sum of Root To Leaf Binary Numbers	Solve	Easy	Amazon+2	Binary Tree Depth-First Search+1
1023. Camelcase Matching	Solve	Medium	Amazon+1	Array String+3
1024. Video Stitching	Solve	Medium	Amazon+1	Array Dynamic Programming+1
1025. Divisor Game	Solve	Easy	Bloomberg+1	Brainteaser Dynamic Programming+2
1026. Maximum Difference Between Node and Ancestor	Solve	Medium	Amazon+2	Binary Tree Depth-First Search+1
1027. Longest Arithmetic Subsequence	Solve	Medium	Google+2	Array Binary Search+2
1028. Recover a Tree From Preorder Traversal	Solve	Hard	Amazon+2	Binary Tree Depth-First Search+2
1029. Two City Scheduling	Solve	Medium	Bloomberg+1	Array Greedy+1
1030. Matrix Cells in Distance Order	Solve	Easy	Yahoo	Array Geometry+3
1031. Maximum Sum of Two Non-Overlapping Subarrays	Solve	Medium	Bytedance+2	Array Dynamic Programming+1
1032. Stream of Characters	Solve	Hard	Amazon+3	Array Data Stream+3
1033. Moving Stones Until Consecutive	Solve	Medium	Facebook	Brainteaser Math
1034. Coloring A Border	Solve	Medium	Amazon+1	Array Breadth-First Search+2
1035. Uncrossed Lines	Solve	Medium	Amazon	Array Dynamic Programming
1036. Escape a Large Maze	Solve	Hard	Apple+2	Array Breadth-First Search+2
1037. Valid Boomerang	Solve	Easy	Google	Array Geometry+1
1038. Binary Search Tree to Greater Sum Tree	Solve	Medium	Amazon+1	Binary Search Tree Binary Tree+2
1039. Minimum Score Triangulation of Polygon	Solve	Medium	Adobe+3	Array Dynamic Programming
1040. Moving Stones Until Consecutive II	Solve	Medium	Facebook	Array Math+2
1041. Robot Bounded In Circle	Solve	Medium	Adobe+6	Math Simulation+1
1042. Flower Planting With No Adjacent	Solve	Medium	-	Breadth-First Search Depth-First Search+1
1043. Partition Array for Maximum Sum	Solve	Medium	Adobe+1	Array Dynamic Programming
1044. Longest Duplicate Substring	Solve	Hard	-	Binary Search Hash Function+4
1045. Customers Who Bought All Products	Solve	Medium	Adobe+2	Database
1046. Last Stone Weight	Solve	Easy	Amazon+3	Array Heap (Priority Queue)
1047. Remove All Adjacent Duplicates In String	Solve	Easy	Amazon+1	Stack String
1048. Longest String Chain	Solve	Medium	Facebook+4	Array Dynamic Programming+4
1049. Last Stone Weight II	Solve	Medium	Amazon+2	Array Dynamic Programming
1050. Actors and Directors Who Cooperated At Least Three Times	Solve	Easy	Amazon	Database