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58 problems total

Array (1905)Sorting (440)Depth First Search (316)Database (301)Breadth First Search (241)Tree (240)Stack (172)Graph Theory (169)Linked List (81)Monotonic Stack (67)Queue (50)Recursion (48)Shortest Path (33)

All Topics(4301)Database(305)Networking(0)Object Oriented Design(31)Programming Languages(5)System Design(0)Algorithms(3944)

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Title	Difficulty	Videos	Companies
Autocomplete Suggestion System	medium	-	twitter
Binary Tree Path Sum - Maximum Sum Leaf to Root path	medium	-
Binary Tree Path Sum - Maximum Sum Root to Leaf path	medium	-
Binary Tree Path Sum - Minimum Sum Root to Leaf path	easy	-	apple
Check if given undirected graph is connected	easy	-
Check if words chain to form a circle	medium	-	dropbox
Find if Path Exists in Directed Graph	easy	-
Find if there is a path between two vertices in a directed graph	easy	-	google facebook amazon
m Coloring Problem	medium	-	google
Largest value path in a directed graph	hard	-	google
List Combinations - Generate unique combinations from list selecting 1 element from each	medium	-
Number of Unicolored Paths between two nodes	medium	-
Shortest Uphill-Downhill Route for a Competitive Runner	medium	-	square
Validate Binary Search Tree	medium		adobe amazon apple
Maximum Depth of Binary Tree	easy		adobe amazon apple
Path Sum 2 - find all root to leaf paths	medium	-	adobe amazon apple
Word Ladder 2 - Get all the ladders	hard	-	amazon apple bloomberg
Palindrome Partitioning	medium		adobe amazon bloomberg
Word Break 1 - Check if word is breakable	medium		adobe amazon apple
Word Break 2 - Construct a sentence	hard		amazon apple audible
Number of Islands	medium		adobe affirm alibaba
Expression Add Operators	hard	-	apple bytedance facebook
Longest Increasing Path in a Matrix	hard	-	adobe amazon apple
Reconstruct Itinerary	hard	-	amazon apple bloomberg
House Robber 3 - Houses in Binary Tree	medium	-	amazon facebook google
Android Unlock Patterns	medium	-	amazon apple bytedance
Lexicographical Numbers	medium		adobe bloomberg bytedance
Pacific Atlantic Water Flow	medium		amazon apple bloomberg
Path Sum 3 - Count paths from parent to child	medium	-	amazon bloomberg facebook
Island Perimeter	easy		amazon apple bloomberg
Most Frequent Subtree Sum	medium	-	amazon apple
Number of Provinces	medium	-	adobe amazon atlassian
N-ary Tree Preorder Traversal	easy	-
N-ary Tree Postorder Traversal	easy		amazon
Trim a Binary Search Tree BST	medium	-	adobe amazon apple
Redundant Connection	medium	-	amazon google
Max Area of Island	medium	-	adobe affirm amazon
Flood Fill	easy	-	amazon apple bloomberg
Letter Case Permutation	medium	-	amazon bloomberg facebook
Sum of Distances in Tree	hard	-	google
Leaf-Similar Trees	easy	-	amazon atlassian facebook
Shortest Bridge	medium	-	facebook google mckinsey
Flip Equivalent Binary Trees	medium		amazon ebay google
Binary Tree Cameras	hard	-	ebay facebook google
Distribute Coins in Binary Tree	medium		amazon facebook google
Cousins in Binary Tree	easy	-	adobe amazon bloomberg
Number of Enclaves	medium	-	google
Delete Nodes And Return Forest	medium		amazon google
Path with Maximum Gold	medium		amazon facebook goldman-sachs
Delete Leaves With a Given Value	medium		amazon google

Showing 1 to 50 of 58 results