|||
75 problems
217
Contains DuplicateEasy
242Valid AnagramEasy
1Two SumEasy
49Group AnagramsMedium
347Top K Frequent ElementsMedium
271Encode and Decode StringsMedium$
238Product of Array Except SelfMedium
128Longest Consecutive SequenceMedium
125Valid PalindromeEasy
153SumMedium
11Container With Most WaterMedium
121Best Time to Buy and Sell StockEasy
3Longest Substring Without Repeating CharactersMedium
424Longest Repeating Character ReplacementMedium
76Minimum Window SubstringHard
20Valid ParenthesesEasy
153Find Minimum in Rotated Sorted ArrayMedium
33Search in Rotated Sorted ArrayMedium
206Reverse Linked ListEasy
21Merge Two Sorted ListsEasy
141Linked List CycleEasy
143Reorder ListMedium
19Remove Nth Node From End of ListMedium
23Merge k Sorted ListsHard
226Invert Binary TreeEasy
104Maximum Depth of Binary TreeEasy
100Same TreeEasy
572Subtree of Another TreeEasy
235Lowest Common Ancestor of a Binary Search TreeMedium
102Binary Tree Level Order TraversalMedium
98Validate Binary Search TreeMedium
230Kth Smallest Element in a BSTMedium
105Construct Binary Tree from Preorder and Inorder TraversalMedium
124Binary Tree Maximum Path SumHard
297Serialize and Deserialize Binary TreeHard
295Find Median from Data StreamHard
39Combination SumMedium
79Word SearchMedium
208Implement Trie (Prefix Tree)Medium
211Design Add and Search Words Data StructureMedium
212Word Search IIHard
200Number of IslandsMedium
133Clone GraphMedium
417Pacific Atlantic Water FlowMedium
207Course ScheduleMedium
261Graph Valid TreeMedium$
323Number of Connected Components in an Undirected GraphMedium$
269Alien DictionaryHard$
70Climbing StairsEasy
198House RobberMedium
213House Robber IIMedium
5Longest Palindromic SubstringMedium
647Palindromic SubstringsMedium
91Decode WaysMedium
322Coin ChangeMedium
152Maximum Product SubarrayMedium
139Word BreakMedium
300Longest Increasing SubsequenceMedium
62Unique PathsMedium
1143Longest Common SubsequenceMedium
53Maximum SubarrayMedium
55Jump GameMedium
57Insert IntervalMedium
56Merge IntervalsMedium
435Non-overlapping IntervalsMedium
252Meeting RoomsEasy$
253Meeting Rooms IIMedium$
48Rotate ImageMedium
54Spiral MatrixMedium
73Set Matrix ZeroesMedium
191Number of 1 BitsEasy
338Counting BitsEasy
190Reverse BitsEasy
268Missing NumberEasy
371Sum of Two IntegersMedium