All Problems

48 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
Median of Two Sorted Arrays	hard	-	adobe airbnb alibaba
Regular Expression Matching	hard	-	adobe airbnb alibaba
Merge K Sorted Lists	hard		adobe airbnb alibaba
Substring with Concatenation of All Words	hard	-	adobe amazon apple
Longest Valid Parentheses	hard	-	adobe amazon apple
First Missing Positive	hard	-	adobe amazon apple
Trapping Rain Water	hard	-	adobe affirm airbnb
Wildcard Matching	hard	-	adobe amazon bloomberg
Minimum Window Substring	hard		adobe airbnb amazon
Largest Rectangle in Histogram	hard	-	adobe amazon bloomberg
Maximal Rectangle	hard	-	adobe amazon bloomberg
Best Time To Buy And Sell Stock 3 - at most twice	hard	-	amazon apple atlassian
Binary Tree Path Sum - Maximum between any two nodes	hard		adobe amazon appdynamics
Word Ladder 2 - Get all the ladders	hard	-	amazon apple bloomberg
Word Ladder 1 - Get Ladder Length	hard	-	affirm amazon apple
Word Break 2 - Construct a sentence	hard		amazon apple audible
Maximum Points on a Line	hard	-	amazon apple bloomberg
Read N Characters Given Read4 2 - Call Multiple Times	hard	-	amazon bloomberg facebook
Best Time To Buy And Sell Stock 4 - at most k times	hard	-	amazon apple bloomberg
Word Search 2 - Return All Words	hard		airbnb amazon apple
Shortest Palindrome 1 - Prepending characters	hard	-	adobe amazon bloomberg
Basic Calculator 1	hard	-	adobe amazon bloomberg
Sliding Window Maximum	hard	-	adobe alibaba amazon
Alien Dictionary	hard		airbnb amazon apple
Integer to English Words	hard		amazon apple barclays
Find Median from Data Stream	hard		adobe amazon apple
Serialize and Deserialize Binary Tree	hard		amazon apple bloomberg
Remove Invalid Parentheses Problem	hard	-	amazon apple bloomberg
Count of Smaller Numbers After Self	hard	-	adobe amazon apple
Longest Increasing Path in a Matrix	hard	-	adobe amazon apple
Reconstruct Itinerary	hard	-	amazon apple bloomberg
Palindrome Pairs	hard	-	airbnb amazon apple
All O`one Data Structure	hard		amazon bloomberg facebook
LFU Cache	hard	-	adobe alibaba amazon
Zuma Game	hard	-	baidu bloomberg
Design Search Autocomplete System	hard	-	amazon apple bloomberg
Max Stack	hard	-	amazon bloomberg facebook
Minimum Window Subsequence	hard	-	amazon bloomberg ebay
Contain Virus	hard	-	bloomberg
Employee Free Time	hard	-	airbnb amazon bloomberg
Minimum Cost to Hire K Workers	hard		bloomberg google
Maximum Frequency Stack	hard	-	amazon apple bloomberg
Minimize Malware Spread	hard	-	amazon bloomberg dropbox
Vertical Order Traversal of a Binary Tree	hard	-	adobe amazon bloomberg
Dice Roll Simulation	hard	-	akuna-capital atlassian bloomberg
Number of Ships in a Rectangle	hard	-	bloomberg
Minimum Insertion Steps to Make a String Palindrome	hard	-	bloomberg google quora
Allocate Mailboxes	hard	-	bloomberg

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