All Problems

133 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
Check if target word exists in matrix horizontally or verticallyeasy-
microsoft
Expected number of rounds to reach one remaining coineasy-
microsoft
Find if there is a path between two vertices in a directed grapheasy-
googlefacebookamazon
Find the Index of the First Occurrence in a Stringeasy-
adobeamazonapple
Implement stack using priority queueeasy-
adobemicrosoftamazon
Two Sumeasy
adobeaetionaffirm
Palindrome Numbereasy
adobeamazonapple
Roman To Integereasy
adobeamazonapple
Longest Common Prefix in array of stringeasy-
adobealibabaamazon
Valid Parentheseseasy
adobeairbnbakuna-capital
Merge Two Sorted Linked Listseasy
adobeairbnbalibaba
Nth Number with sum of digits as 10easy-
microsoft
Read N characters given read7easy-
microsoft
Remove duplicates from Sorted Array 1easy
adobeamazonapple
Remove Elementeasy
amazonbloomberggoogle
Search Insert Position in sorted arrayeasy-
adobeamazonapple
Transitive Closure of a Grapheasy-
microsoft
Add Binary Stringseasy-
adobeamazonapple
Square root of an integereasy-
amazonapplebloomberg
Climbing Stairs - Take atmost 2 Stepseasy
adobealibabaamazon
Remove duplicates from Sorted List 1easy
adobeamazonapple
Merge Two Sorted Arrayseasy-
adobeamazonapple
Binary Tree Inorder Traversaleasy-
alibabaamazonapple
Same Treeeasy
amazonapplebloomberg
Symmetric Binary Treeeasy-
adobealibabaamazon
Maximum Depth of Binary Treeeasy
adobeamazonapple
Convert Sorted Array to height-balanced Binary Search Treeeasy
airbnbamazonapple
Balanced Binary Treeeasy-
adobeamazonapple
Minimum Depth of Binary Treeeasy-
amazonapplefacebook
Path Sum 1 - Check if root to leaf path existseasy-
adobeamazonapple
Pascal’s Triangle 1 - Generate first n rowseasy-
adobeamazonapple
Best Time To Buy And Sell Stock 1 - only one transactioneasy
adobeakuna-capitalalibaba
Valid Palindromeeasy
adobeamazonapple
Single Number 1 - All elements except one occur twiceeasy
adobeairbnbamazon
Linked List Cycle 1 - Detect Cycleeasy
adobeamazonapple
Binary Tree Preorder Traversaleasy-
amazonbloombergcisco
Intersection of Two Linked Listseasy-
airbnbalibabaamazon
Excel Sheet Column Titleeasy-
adobeapplefacebook
Majority Element - Boyer–Moore majority vote algorithmeasy-
adobeamazonapple
Majority Element 1 - with n by 2 definitioneasy-
facebookgooglemicrosoft
Excel Sheet Column Numbereasy-
amazonapplebloomberg
Number of 1 Bitseasy
adobeamazonapple
Happy Numbereasy-
adobeairbnbamazon
Remove Linked List Elementseasy-
adobeamazonapple
Isomorphic Stringseasy
adobeamazonbloomberg
Reverse Linked Listeasy
adobealibabaamazon
Contains Duplicate 1 - Check if array has duplicateseasy
adobeairbnbamazon
Contains Duplicate 2 - within k distanceeasy-
adobeairbnbamazon
Count Complete Tree Nodeseasy-
amazonbloombergbytedance
Implement stack using queueseasy-
amazonbloombergcitadel
Showing 1 to 50 of 133 results
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