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4301 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
Student Attendance Record 1easy
google
Student Attendance Record 2hard-
googleuber
Optimal Divisionmedium-
amazon
Brick Wallmedium-
adobebloombergfacebook
Split Concatenated Stringsmedium-
alibaba
Next Greater Element 3 - Find smallest number larger than given number using same digits same digitsmedium-
amazonbloombergfacebook
Reverse Words in a String 3easy-
amazonapplebloomberg
Logical OR of Two Binary Grids Represented as Quad-Treesmedium-
amazongooglesumologic
Maximum Depth of N-ary Treeeasy-
amazonbloomberggoogle
Subarray Sum Equals Kmedium-
adobeamazonapple
Array Partitioneasy-
adobeamazonapple
Longest Line of Consecutive One in Matrixmedium-
google
Binary Tree Tilteasy-
indeed
Find the Closest Palindromehard-
amazonfacebookgoogle
Array Nestingmedium-
applebloomberg
Reshape the Matrixeasy-
mathworks
Permutation in Stringmedium-
amazonbloombergfacebook
Maximum Vacation Dayshard-
facebookgooglemicrosoft
Median Employee Salaryhard-
google
Managers with at Least 5 Direct Reports Problemmedium-
amazonbloomberg
Find Median Given Frequency of Numbershard-
pinterest
Subtree of Another Treeeasy
amazonbloombergebay
Squirrel Simulationmedium-
square
Winning Candidatemedium-
Distribute Candieseasy-
liverampmicrosoft
Out of Boundary Pathsmedium-
baidu
Employee Bonus Problemeasy-
netsuite
Get Highest Answer Rate Questionmedium-
facebook
Find Cumulative Salary of an Employeehard-
amazon
Count Student Number in Departmentsmedium-
twitter
Shortest Unsorted Continuous Subarraymedium-
amazonbloomberggoogle
Kill Processmedium-
amazonapplebloomberg
Delete Operation for Two Stringsmedium-
google
Find Customer Referee Problemeasy-
amazon
Investments in 2016medium-
twitter
Customer Placing the Largest Number of Orders Problemeasy-
amazontwitter
Erect the Fencehard-
google
Design In-Memory File Systemhard-
airbnbamazonbaidu
N-ary Tree Preorder Traversaleasy-
N-ary Tree Postorder Traversaleasy
amazon
Tag Validatorhard-
googlemicrosoftuber
Fraction Addition and Subtractionmedium
goldman-sachsixl
Valid Squaremedium-
facebookgooglepure-storage
Longest Harmonious Subsequenceeasy-
appleliveramp
Big Countries Problemeasy-
adobebloomberg
Classes More Than 5 Students Problemeasy-
Friend Requests I - Overall Acceptance Rate Problemeasy-
facebook
Range Addition 2easy-
ixl
Minimum Index Sum of Two Listseasy-
oracleyelp
Non-negative Integers without Consecutive Oneshard-
pocket-gems
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