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156 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
Find the Index of the First Occurrence in a String	easy	-	adobe amazon apple
Longest Substring Without Repeating Characters	medium		adobe alation alibaba
Longest Palindromic Substring	medium		adobe airbnb alibaba
Convert String to Integer atoi	medium	-	adobe amazon apple
Regular Expression Matching	hard	-	adobe airbnb alibaba
Integer To Roman	medium	-	adobe amazon apple
Roman To Integer	easy		adobe amazon apple
Longest Common Prefix in array of string	easy	-	adobe alibaba amazon
Letter Combinations of a Phone Number	medium	-	amazon apple atlassian
Valid Parentheses	easy		adobe airbnb akuna-capital
Generate Parentheses	medium	-	adobe alibaba amazon
Largest String With Swaps	medium	-	facebook
Number of Ways to Rearrange Sticks With K Sticks Visible	hard	-	facebook
Substring with Concatenation of All Words	hard	-	adobe amazon apple
Longest Valid Parentheses	hard	-	adobe amazon apple
Count and Say Sequence	medium	-	adobe amazon apple
Multiply Strings	medium	-	amazon apple expedia
Wildcard Matching	hard	-	adobe amazon bloomberg
Group Anagrams	medium		adobe affirm amazon
Valid Number	hard	-	adobe amazon apple
Add Binary Strings	easy	-	adobe amazon apple
Text Justification	hard	-	airbnb amazon apple
Simplify Path	medium	-	adobe amazon bloomberg
Edit Distance	medium	-	adobe amazon apple
Minimum Window Substring	hard		adobe airbnb amazon
Word Search 1 - Find if word exists	medium		adobe amazon apple
Decode Ways	medium		adobe amazon apple
Restore IP Addresses	medium	-	adobe amazon apple
Valid Palindrome	easy		adobe amazon apple
Word Ladder 2 - Get all the ladders	hard	-	amazon apple bloomberg
Word Ladder 1 - Get Ladder Length	hard	-	affirm amazon apple
Word Break 1 - Check if word is breakable	medium		adobe amazon apple
Word Break 2 - Construct a sentence	hard		amazon apple audible
Reverse Words in a String	medium	-	amazon apple bloomberg
Read N Characters Given Read4	easy	-	facebook google
Read N Characters Given Read4 2 - Call Multiple Times	hard	-	amazon bloomberg facebook
Longest Substring with At Most Two Distinct Characters	medium	-	adobe amazon facebook
Friend Words - One Edit Distance	medium	-	amazon facebook google
Fraction to Recurring Decimal	medium	-	airbnb amazon apple
Excel Sheet Column Title	easy	-	adobe apple facebook
Excel Sheet Column Number	easy	-	amazon apple bloomberg
Largest Number From Given Numbers	medium		amazon apple bytedance
Isomorphic Strings	easy		adobe amazon bloomberg
Implement Trie	medium		amazon apple bloomberg
Design Add and Search Words Data Structure	medium		airbnb amazon apple
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
Basic Calculator 2 Problem	medium	-	airbnb amazon apple
Different Ways to Add Parentheses	medium	-	amazon cisco citadel

Showing 1 to 50 of 156 results