Array
11 problemsTwo SumBest Time to Buy and Sell StockMajority ElementContains DuplicateInsert IntervalMerge Intervals3SumProduct of Array Except Self+3 more
Stack
7 problemsValid ParenthesesImplement Queue using StacksMin StackEvaluate Reverse Polish NotationTrapping Rain WaterBasic CalculatorLargest Rectangle in Histogram
Linked List
5 problemsMerge Two Sorted ListsLinked List CycleReverse Linked ListMiddle of the Linked ListLRU Cache
String
8 problemsValid PalindromeValid AnagramLongest PalindromeLongest Substring Without Repeating CharactersString to Integer (atoi)Longest Palindromic SubstringFind All Anagrams in a StringMinimum Window Substring
Binary Search
5 problemsBinary SearchFirst Bad VersionSearch in Rotated Sorted ArrayTime Based Key-Value StoreMaximum Profit in Job Scheduling
Binary Tree
14 problemsInvert Binary TreeBalanced Binary TreeDiameter of Binary TreeMaximum Depth of Binary TreeSame TreeSubtree of Another TreeBinary Tree Level Order TraversalLowest Common Ancestor of a Binary Search Tree+6 more
Graph
10 problemsFlood FillClone Graph01 MatrixNumber of IslandsRotting OrangesAccounts MergeCourse ScheduleWord Ladder+2 more
Dynamic Programming
10 problemsClimbing StairsMaximum SubarrayCoin ChangePartition Equal Subset SumUnique PathsHouse RobberWord BreakLongest Increasing Subsequence+2 more
Heap
5 problemsK Closest Points to OriginTask SchedulerFind Median from Data StreamMerge K Sorted ListsTop K Frequent Elements