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364 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
Binary Tree Path Sum - Minimum Sum Root to Leaf patheasy-
apple
Collatz Sequenceeasy-
apple
Find the Index of the First Occurrence in a Stringeasy-
adobeamazonapple
Divide Two Integersmedium-
adobeamazonapple
Two Sumeasy
adobeaetionaffirm
Add Two Numbers represented as Linked List in Reversed Ordermedium-
adobeaetionairbnb
Longest Substring Without Repeating Charactersmedium
adobealationalibaba
Median of Two Sorted Arrayshard-
adobeairbnbalibaba
Longest Palindromic Substringmedium
adobeairbnbalibaba
Reverse Integermedium-
adobeamazonapple
Convert String to Integer atoimedium-
adobeamazonapple
Palindrome Numbereasy
adobeamazonapple
Regular Expression Matchinghard-
adobeairbnbalibaba
Container With Most Watermedium
adobeamazonapple
Integer To Romanmedium-
adobeamazonapple
Roman To Integereasy
adobeamazonapple
Longest Common Prefix in array of stringeasy-
adobealibabaamazon
3Sum0 - Find three elements in an array that sum to a zeromedium
adobeakuna-capitalalibaba
3Sum - Closestmedium-
adobeamazonapple
Letter Combinations of a Phone Numbermedium-
amazonappleatlassian
4Summedium-
adobeamazonapple
Remove Nth Node From End of Listmedium
adobeamazonapple
Valid Parentheseseasy
adobeairbnbakuna-capital
Merge Two Sorted Linked Listseasy
adobeairbnbalibaba
Generate Parenthesesmedium-
adobealibabaamazon
Merge K Sorted Listshard
adobeairbnbalibaba
Number of cells in multiplication table containing Xmedium-
apple
Swap Nodes in Pairsmedium-
adobeamazonapple
K Reverse a linked listhard-
adobeamazonapple
Remove duplicates from Sorted Array 1easy
adobeamazonapple
Substring with Concatenation of All Wordshard-
adobeamazonapple
Next Permutationmedium-
adobeamazonapple
Longest Valid Parentheseshard-
adobeamazonapple
Search in Rotated Sorted Arraymedium
adobealibabaamazon
Find first and last positions of target element in sorted arraymedium-
airbnbamazonapple
Search Insert Position in sorted arrayeasy-
adobeamazonapple
Valid Sudokumedium-
adobeamazonapple
Sudoku Solverhard-
adobeamazonapple
Count and Say Sequencemedium-
adobeamazonapple
Combination Sum 1medium
airbnbakuna-capitalamazon
Combination Sum 2 - Cant Reuse same elementmedium-
adobeamazonapple
First Missing Positivehard-
adobeamazonapple
Trapping Rain Waterhard-
adobeaffirmairbnb
Multiply Stringsmedium-
amazonappleexpedia
Rotate n x n matrix by 90 degreesmedium
adobeakuna-capitalamazon
Jump Game 2 - Get min jumpsmedium-
adobeamazonapple
Permutations of Array 1medium-
adobeamazonapple
Permutations of Array 2 - Array has duplicatesmedium-
adobeamazonapple
Group Anagramsmedium
adobeaffirmamazon
Implement Power Function 1medium-
adobeamazonapple
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