All Problems

35 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
Two Sumeasy
adobeaetionaffirm
Longest Common Prefix in array of stringeasy-
adobealibabaamazon
3Sum0 - Find three elements in an array that sum to a zeromedium
adobeakuna-capitalalibaba
Lexicographically Smallest Palindrome by Minimum Insertionshard-
quora
Next Permutationmedium-
adobeamazonapple
Combination Sum 1medium
airbnbakuna-capitalamazon
Rotate n x n matrix by 90 degreesmedium
adobeakuna-capitalamazon
Simplify Pathmedium-
adobeamazonbloomberg
Path Sum 2 - find all root to leaf pathsmedium-
adobeamazonapple
Find Peak Element in a Given Arraymedium-
amazonapplebloomberg
House Robbermedium
adobeairbnbamazon
Maximum Intervals Overlap Countmedium
amazonappleatlassian
Serialize and Deserialize Binary Treehard
amazonapplebloomberg
Insert Delete Search and GetRandom in Constant Time 1 - Dupes not allowedmedium-
adobeaffirmamazon
Elimination Gamemedium-
amazonbloombergquora
Path Sum 3 - Count paths from parent to childmedium-
amazonbloombergfacebook
Minimum Number of Arrows to Burst Balloonsmedium-
amazonfacebookgoogle
Diagonal Traversemedium-
amazonappleebay
Contiguous Arraymedium-
adobeamazonapple
Subarray Sum Equals Kmedium-
adobeamazonapple
1-bit and 2-bit Characterseasy-
googleixlmicrosoft
Reaching Pointshard-
courseragoldman-sachsgoogle
Peak Index in a Mountain Arraymedium-
amazonbloombergfacebook
Exam Roommedium-
amazonfacebookgoogle
3Sum With Multiplicitymedium-
quora
Longest Arithmetic Subsequencemedium-
amazonfacebookgoogle
Previous Permutation With One Swapmedium-
facebookmicrosoftquora
Encode Numbermedium-
quora
Subtract the Product and Sum of Digits of an Integereasy-
googlequorauber
Find Numbers with Even Number of Digitseasy-
quora
Minimum Insertion Steps to Make a String Palindromehard-
bloomberggooglequora
Sort the Matrix Diagonallymedium-
quora
Construct Target Array With Multiple Sumshard-
quora
Website Similarity Analysismedium-
quora
Word Sense Disambiguation Algorithmhard-
quora