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49 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)
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Balanced delimiters in an expressioneasy-
uber
Calculating the mean and median of an unsorted arrayeasy-
uber
Election Voting Machine Monitoreasy-
uber
Find Deepest Node in a Binary Treeeasy-
googleuber
Two Sumeasy
adobeaetionaffirm
Roman To Integereasy
adobeamazonapple
Valid Parentheseseasy
adobeairbnbakuna-capital
Merge Two Sorted Linked Listseasy
adobeairbnbalibaba
Remove duplicates from Sorted Array 1easy
adobeamazonapple
Plus One 1 - Given number as array plus oneeasy-
adobeamazonapple
Square root of an integereasy-
amazonapplebloomberg
Climbing Stairs - Take atmost 2 Stepseasy
adobealibabaamazon
Merge Two Sorted Arrayseasy-
adobeamazonapple
Binary Tree Inorder Traversaleasy-
alibabaamazonapple
Symmetric Binary Treeeasy-
adobealibabaamazon
Maximum Depth of Binary Treeeasy
adobeamazonapple
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
Binary Tree Postorder Traversaleasy-
adobeamazonfacebook
Excel Sheet Column Numbereasy-
amazonapplebloomberg
Happy Numbereasy-
adobeairbnbamazon
Remove Linked List Elementseasy-
adobeamazonapple
Reverse Linked Listeasy
adobealibabaamazon
Summary Rangeseasy-
amazonbloombergcapital-one
Implement Queue using Stackseasy-
amazonapplebloomberg
Valid Anagrameasy
amazonapplebloomberg
Shortest Word Distance 1easy-
amazongooglelinkedin
Palindrome Permutationeasy-
amazonapplebloomberg
First Bad Versioneasy-
adobeamazonbloomberg
Move Zeroes at the end of arrayeasy-
adobeamazonapple
Word Pattern 1easy-
amazoncapital-onedropbox
Counting Bitseasy
amazonapplebloomberg
Reverse Stringeasy
adobeamazonapple
Moving Average of Last N numbers in a Streameasy-
amazonappdynamicsbloomberg
Intersection of Two Arrays 1 - Unique Elementseasy
amazonapplebloomberg
Intersection of Two Arrays 2 - Duplicates allowedeasy-
amazonapplebloomberg
Logger Rate Limitereasy-
amazonappleatlassian
Ransom Noteeasy-
amazonapplemicrosoft
Second Minimum Node In a Binary Treeeasy-
amazonlinkedinmicrosoft
Design HashMapeasy-
adobeamazonapple
Flood Filleasy-
amazonapplebloomberg
Backspace String Compareeasy-
amazonatlassianfacebook
Valid Mountain Arrayeasy-
googleuber
Squares of a Sorted arrayeasy-
adobeamazonapple
Find fixed point in sorted arrayeasy-
uberappleamazon
Subtract the Product and Sum of Digits of an Integereasy-
googlequorauber
Find the Distance Value Between Two Arrayseasy-
uber