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80 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
All Permutations of a String 3 in Lexicographic Order	easy	-
All Permutations of a String with distinct characters	medium	-
All Permutations of a String with duplicate characters	medium	-
Array With Elements Not Equal to Average of Neighbors	medium	-
Check if an Array of Integers is Sorted	easy	-
Coin Change - Count Number of Ways of representing Amount given Finite supply of denominations	medium	-
Factorial of a Number	easy	-
Integer Partition Algorithm	medium	-
Add Two Numbers represented as Linked List in Reversed Order	medium	-	adobe aetion airbnb
Regular Expression Matching	hard	-	adobe airbnb alibaba
Merge Two Sorted Linked Lists	easy		adobe airbnb alibaba
Generate Parentheses	medium	-	adobe alibaba amazon
Longest Palindromic Subsequence - Get Subsequence	medium	-
Maximum Number of Matching Indices After Right Shifts	easy	-
Print all subarrays of a given array	easy	-
Subset Sum 1 - Is there a subset?	medium	-
Swap Nodes in Pairs	medium	-	adobe amazon apple
K Reverse a linked list	hard	-	adobe amazon apple
Wildcard Matching	hard	-	adobe amazon bloomberg
Implement Power Function 1	medium	-	adobe amazon apple
Kth Permutation Sequence of Numbers 1 to N	hard	-	amazon apple facebook
Symmetric N-ary Tree Detection	easy	-	amazon
Tower of Hanoi	medium
Unique 3-Digit Even Numbers	easy	-
Unique Paths in Grid 1 - Count all paths moving right or down	medium		adobe alibaba amazon
Unique Paths in Grid 1-2 - Get all paths moving right or down	medium	-
Unique Paths in Grid 2 - Count all paths moving right or down with obstacles	medium	-	amazon apple bloomberg
Text Justification	hard	-	airbnb amazon apple
Edit Distance	medium	-	adobe amazon apple
Reorder List such that i-th element points to n-i-th element	medium		adobe amazon apple
Find Minimum in Rotated Sorted Array 2 - Duplicates allowed	hard	-	adobe amazon facebook
House Robber	medium		adobe airbnb amazon
Remove Linked List Elements	easy	-	adobe amazon apple
Reverse Linked List	easy		adobe alibaba amazon
Basic Calculator 1	hard	-	adobe amazon bloomberg
Power of Two	easy	-	amazon apple google
Number of Digit One	hard	-	amazon apple
Palindrome Linked List	easy	-	adobe amazon apple
Different Ways to Add Parentheses	medium	-	amazon cisco citadel
Strobogrammatic Number 2 - Generate for length n	medium	-	cisco facebook google
Strobogrammatic Number 3 - Count in Range	hard	-	facebook google
Prune Unary nodes to form Full Binary Tree	medium	-	yahoo
Verify Preorder Sequence in Binary Search Tree	medium	-	mathworks uber zenefits
Integer to English Words	hard		amazon apple barclays
Power of Three	easy	-	apple goldman-sachs google
Power of Four	easy	-	two-sigma
Elimination Game	medium	-	amazon bloomberg quora
Decode String	medium	-	alibaba amazon appdynamics
Ternary Expression Parser	medium	-	snapchat
Predict the Winner	medium	-	amazon apple google

Showing 1 to 50 of 80 results