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

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TitleDifficultyVideosCompanies
Best Position for a Service Centrehard-
reddit
Find a Value of a Mysterious Function Closest to Targethard-
Implement Hierarchical Locking System for Tree Structuresmedium-
Longest Special Pathhard-
Longest Special Path IIhard-
Maximum Number of Matching Indices After Right Shiftseasy-
Maximum Product of the Length of Two Palindromic Subsequencesmedium-
Minimum Possible Integer After at Most K Adjacent Swaps On Digitshard-
Range XOR Queries with Subarray Reversalshard-
Search Word in Root-to-Leaf Word Treeeasy-
Shortest Path in a Weighted Treehard-
Split Two Strings to Make Palindromemedium-
Subtree Inversion Sumhard-
Symmetric N-ary Tree Detectioneasy-
amazon
Binary Tree Inorder Traversaleasy-
alibabaamazonapple
Unique BSTs 2 - Generatemedium-
adobeamazonapple
Unique BSTs 1 - Countmedium-
adobeamazonapple
Validate Binary Search Treemedium
adobeamazonapple
Recover Binary Search Treemedium-
amazonbloombergfacebook
Same Treeeasy
amazonapplebloomberg
Symmetric Binary Treeeasy-
adobealibabaamazon
Binary Tree Level Order Traversal - Level by Levelmedium
adobeamazonapple
Binary Tree Traversal - Zigzag Level Order Traversalmedium-
amazonapplebloomberg
Maximum Depth of Binary Treeeasy
adobeamazonapple
Construct Binary Tree from Inorder and Preorder Traversalmedium
adobeamazonapple
Construct Binary Tree from Inorder and Postorder Traversalmedium-
amazonbloombergfacebook
Binary Tree Traversal - Level Order Bottom upmedium-
adobeamazonapple
Convert Sorted Array to height-balanced Binary Search Treeeasy
airbnbamazonapple
Convert Sorted List into a height-balanced Binary search Treemedium-
amazonbloombergfacebook
Balanced Binary Treeeasy-
adobeamazonapple
Minimum Depth of Binary Treeeasy-
amazonapplefacebook
Path Sum 1 - Check if root to leaf path existseasy-
adobeamazonapple
Path Sum 2 - find all root to leaf pathsmedium-
adobeamazonapple
Flatten binary tree to linked list in order of preorder traversalmedium-
adobeamazonapple
Populate next pointer to right node in Perfect Binary Treemedium-
amazonapplebloomberg
Populate next pointer to right node in Binary Treemedium-
amazonbloombergfacebook
Binary Tree Path Sum - Maximum between any two nodeshard
adobeamazonappdynamics
Sum Root to Leaf Numbersmedium-
amazonbloombergebay
Binary Tree Preorder Traversaleasy-
amazonbloombergcisco
Binary Tree Postorder Traversaleasy-
adobeamazonfacebook
Binary Tree Upside Downmedium-
googlelinkedin
Binary Search Tree BST Inorder Iteratormedium-
alibabaamazonapple
Binary Tree Right Side Viewmedium-
adobeamazonapple
Count Complete Tree Nodeseasy-
amazonbloombergbytedance
Invert Binary Treeeasy
amazonapplebloomberg
Kth Smallest Element in a BSTmedium
affirmamazonapple
Lowest Common Ancestor of a Binary Search Treemedium
adobeamazonbloomberg
Lowest Common Ancestor of a Binary Treemedium
adobeairbnbamazon
Count Univalue Subtreesmedium-
amazonbloombergbox
Verify Preorder Sequence in Binary Search Treemedium-
mathworksuberzenefits
Showing 1 to 50 of 314 results
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