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corpsepiges
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leetcode for every language , sooner or later , I want

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| ID | Title | Difficulty | Note | Java | Python | Ruby | JavaScript | C++ | |----|:--|:--:|:--:|:--:|:--:|:--:|:--:|:--:| |001|Two Sum|Easy|noNote|Java|Python|Ruby|JavaScript|no| |002|Add Two Numbers|Medium|noNote|Java|Python|Ruby|JavaScript|no| |003|Longest Substring Without Repeating Characters|Medium|noNote|Java|Python|no|no|no| |004|Median of Two Sorted Arrays|Hard|noNote|no|no|no|no|no| |005|Longest Palindromic Substring|Medium|noNote|no|no|no|no|no| |006|ZigZag Conversion|Medium|noNote|Java|Python|no|no|no| |007|Reverse Integer|Easy|noNote|Java|Python|Ruby|no|no| |008|String to Integer (atoi)|Medium|noNote|Java|no|no|no|no| |009|Palindrome Number|Easy|noNote|Java|Python|Ruby|no|no| |010|Regular Expression Matching|Hard|noNote|Java|no|no|no|no| |011|Container With Most Water|Medium|noNote|Java|no|no|no|no| |012|Integer to Roman|Medium|noNote|Java|Python|no|no|no| |013|Roman to Integer|Easy|noNote|Java|Python|no|no|no| |014|Longest Common Prefix|Easy|noNote|Java|Python|no|no|no| |015|3Sum|Medium|noNote|Java|Python|Ruby|JavaScript|no| |016|3Sum Closest|Medium|noNote|Java|no|no|no|no| |017|Letter Combinations of a Phone Number|Medium|noNote|Java|Python|no|no|no| |018|4Sum|Medium|noNote|Java|no|no|no|no| |019|Remove Nth Node From End of List|Medium|noNote|Java|Python|Ruby|no|no| |020|Valid Parentheses|Easy|noNote|Java|no|no|no|no| |021|Merge Two Sorted Lists|Easy|noNote|Java|Python|Ruby|no|no| |022|Generate Parentheses|Medium|noNote|Java|Python|no|no|no| |023|Merge k Sorted Lists|Hard|noNote|Java|Python|Ruby|no|no| |024|Swap Nodes in Pairs|Medium|noNote|Java|Python|no|no|no| |025|Reverse Nodes in k-Group|Hard|noNote|Java|no|no|no|no| |026|Remove Duplicates from Sorted Array|Easy|noNote|Java|Python|no|no|no| |027|Remove Element|Easy|noNote|Java|Python|no|no|no| |028|Implement strStr()|Easy|noNote|Java|no|no|no|no| |029|Divide Two Integers|Medium|noNote|Java|no|no|no|no| |030|Substring with Concatenation of All Words|Hard|noNote|no|no|no|no|no| |031|Next Permutation|Medium|noNote|Java|Python|no|no|no| |032|Longest Valid Parentheses|Hard|noNote|Java|no|no|no|no| |033|Search in Rotated Sorted Array|Medium|noNote|Java|no|no|no|no| |034|Search for a Range|Medium|noNote|Java|Python|no|no|no| |035|Search Insert Position|Easy|noNote|Java|Python|no|no|no| |036|Valid Sudoku|Medium|noNote|Java|no|no|no|no| |037|Sudoku Solver|Hard|noNote|Java|no|no|no|no| |038|Count and Say|Easy|noNote|Java|no|no|no|no| |039|Combination Sum|Medium|noNote|Java|Python|no|no|no| |040|Combination Sum II|Medium|noNote|Java|no|no|no|no| |041|First Missing Positive|Hard|noNote|Java|Python|no|no|no| |042|Trapping Rain Water|Hard|noNote|Java|no|no|no|no| |043|Multiply Strings|Medium|noNote|Java|Python|no|no|no| |044|Wildcard Matching|Hard|noNote|no|no|no|no|no| |045|Jump Game II|Hard|noNote|Java|no|no|no|no| |046|Permutations|Medium|noNote|Java|Python|no|no|no| |047|Permutations II|Medium|noNote|Java|Python|no|no|no| |048|Rotate Image|Medium|noNote|Java|Python|no|no|no| |049|Group Anagrams|Medium|noNote|Java|Python|no|no|no| |050|Pow(x, n)|Medium|noNote|Java|Python|no|no|no| |051|N-Queens|Hard|noNote|Java|Python|no|no|no| |052|N-Queens II|Hard|noNote|Java|Python|no|no|no| |053|Maximum Subarray|Easy|noNote|Java|Python|no|no|no| |054|Spiral Matrix|Medium|noNote|Java|Python|no|no|no| |055|Jump Game|Medium|noNote|Java|Python|no|JavaScript|no| |056|Merge Intervals|Medium|noNote|Java|no|no|no|no| |057|Insert Interval|Hard|noNote|Java|Python|no|no|no| |058|Length of Last Word|Easy|noNote|Java|Python|no|no|no| |059|Spiral Matrix II|Medium|noNote|Java|Python|no|no|no| |060|Permutation Sequence|Medium|noNote|Java|Python|no|no|no| |061|Rotate List|Medium|noNote|Java|Python|no|no|no| |062|Unique Paths|Medium|noNote|Java|Python|no|no|no| |063|Unique Paths II|Medium|noNote|Java|Python|no|no|no| |064|Minimum Path Sum|Medium|noNote|Java|Python|no|no|no| |065|Valid Number|Hard|noNote|no|no|no|no|no| |066|Plus One|Easy|noNote|Java|no|no|no|no| |067|Add Binary|Easy|noNote|Java|Python|no|no|no| |068|Text Justification|Hard|noNote|Java|Python|no|no|no| |069|Sqrt(x)|Easy|noNote|Java|Python|no|no|no| |070|Climbing Stairs|Easy|noNote|Java|Python|no|no|no| |071|Simplify Path|Medium|noNote|no|no|no|no|no| |072|Edit Distance|Hard|noNote|Java|Python|no|no|no| |073|Set Matrix Zeroes|Medium|noNote|Java|Python|no|no|no| |074|Search a 2D Matrix|Medium|noNote|Java|Python|no|no|no| |075|Sort Colors|Medium|noNote|Java|Python|no|no|no| |076|Minimum Window Substring|Hard|noNote|no|no|no|no|no| |077|Combinations|Medium|noNote|Java|Python|no|no|no| |078|Subsets|Medium|noNote|Java|Python|no|no|no| |079|Word Search|Medium|noNote|Java|no|no|no|no| |080|Remove Duplicates from Sorted Array II|Medium|noNote|Java|Python|no|no|no| |081|Search in Rotated Sorted Array II|Medium|noNote|Java|no|no|no|no| |082|Remove Duplicates from Sorted List II|Medium|noNote|Java|Python|no|no|no| |083|Remove Duplicates from Sorted List|Easy|noNote|Java|Python|no|no|no| |084|Largest Rectangle in Histogram|Hard|noNote|no|no|no|no|no| |085|Maximal Rectangle|Hard|noNote|no|no|no|no|no| |086|Partition List|Medium|noNote|Java|Python|no|no|no| |087|Scramble String|Hard|noNote|Java|Python|no|no|no| |088|Merge Sorted Array|Easy|noNote|Java|Python|no|no|no| |089|Gray Code|Medium|noNote|Java|Python|no|no|no| |090|Subsets II|Medium|noNote|Java|Python|no|no|no| |091|Decode Ways|Medium|noNote|Java|Python|no|no|no| |092|Reverse Linked List II|Medium|noNote|Java|no|no|no|no| |093|Restore IP Addresses|Medium|noNote|Java|Python|no|no|no| |094|Binary Tree Inorder Traversal|Medium|noNote|Java|Python|Ruby|no|no| |095|Unique Binary Search Trees II|Medium|noNote|Java|no|no|no|no| |096|Unique Binary Search Trees|Medium|noNote|Java|Python|no|no|no| |097|Interleaving String|Hard|noNote|Java|Python|no|no|no| |098|Validate Binary Search Tree|Medium|noNote|Java|Python|Ruby|no|no| |099|Recover Binary Search Tree|Hard|noNote|no|Python|no|no|no| |100|Same Tree|Easy|noNote|Java|Python|Ruby|no|no| |101|Symmetric Tree|Easy|noNote|Java|Python|Ruby|no|no| |102|Binary Tree Level Order Traversal|Medium|noNote|Java|Python|no|no|no| |103|Binary Tree Zigzag Level Order Traversal|Medium|noNote|Java|Python|no|no|no| |104|Maximum Depth of Binary Tree|Easy|noNote|Java|Python|Ruby|no|no| |105|Construct Binary Tree from Preorder and Inorder Traversal|Medium|noNote|Java|Python|Ruby|no|no| |106|Construct Binary Tree from Inorder and Postorder Traversal|Medium|noNote|Java|Python|Ruby|no|no| |107|Binary Tree Level Order Traversal II|Easy|noNote|Java|Python|no|no|no| |108|Convert Sorted Array to Binary Search Tree|Easy|noNote|Java|Python|no|no|no| |109|Convert Sorted List to Binary Search Tree|Medium|noNote|Java|Python|no|no|no| |110|Balanced Binary Tree|Easy|noNote|Java|Python|Ruby|no|no| |111|Minimum Depth of Binary Tree|Easy|noNote|Java|Python|Ruby|no|no| |112|Path Sum|Easy|noNote|Java|Python|Ruby|no|no| |113|Path Sum II|Medium|noNote|Java|Python|no|no|no| |114|Flatten Binary Tree to Linked List|Medium|noNote|Java|Python|no|no|no| |115|Distinct Subsequences|Hard|noNote|no|no|no|no|no| |116|Populating Next Right Pointers in Each Node|Medium|noNote|Java|Python|no|no|no| |117|Populating Next Right Pointers in Each Node II|Medium|noNote|Java|Python|no|no|no| |118|Pascal's Triangle|Easy|noNote|Java|Python|no|no|no| |119|Pascal's Triangle II|Easy|noNote|Java|Python|no|no|no| |120|Triangle|Medium|noNote|Java|Python|no|no|no| |121|Best Time to Buy and Sell Stock|Easy|noNote|Java|no|no|no|no| |122|Best Time to Buy and Sell Stock II|Easy|noNote|Java|no|no|no|no| |123|Best Time to Buy and Sell Stock III|Hard|noNote|Java|no|no|no|no| |124|Binary Tree Maximum Path Sum|Hard|noNote|Java|no|no|no|no| |125|Valid Palindrome|Easy|noNote|Java|no|no|no|no| |126|Word Ladder II|Hard|noNote|no|no|no|no|no| |127|Word Ladder|Medium|noNote|Java|no|no|no|no| |128|Longest Consecutive Sequence|Hard|noNote|Java|no|no|no|no| |129|Sum Root to Leaf Numbers|Medium|noNote|Java|Python|no|no|no| |130|Surrounded Regions|Medium|noNote|Java|no|no|no|no| |131|Palindrome Partitioning|Medium|noNote|Java|no|no|no|no| |132|Palindrome Partitioning II|Hard|noNote|no|no|no|no|no| |133|Clone Graph|Medium|noNote|Java|Python|no|no|no| |134|Gas Station|Medium|noNote|Java|Python|no|no|no| |135|Candy|Hard|noNote|Java|no|no|no|no| |136|Single Number|Easy|noNote|Java|Python|no|no|no| |137|Single Number II|Medium|noNote|Java|no|no|no|no| |138|Copy List with Random Pointer|Medium|noNote|Java|Python|no|no|no| |139|Word Break|Medium|noNote|Java|no|no|no|no| |140|Word Break II|Hard|noNote|Java|no|no|no|no| |141|Linked List Cycle|Easy|noNote|Java|Python|no|no|no| |142|Linked List Cycle II|Medium|noNote|Java|Python|no|no|no| |143|Reorder List|Medium|noNote|Java|Python|no|no|no| |144|Binary Tree Preorder Traversal|Medium|noNote|Java|Python|Ruby|no|no| |145|Binary Tree Postorder Traversal|Hard|noNote|Java|Python|no|no|no| |146|LRU Cache|Hard|noNote|Java|Python|no|no|no| |147|Insertion Sort List|Medium|noNote|Java|no|no|no|no| |148|Sort List|Medium|noNote|Java|Python|no|no|no| |149|Max Points on a Line|Hard|noNote|Java|no|no|no|no| |150|Evaluate Reverse Polish Notation|Medium|noNote|Java|no|no|no|no| |151|Reverse Words in a String|Medium|noNote|Java|no|no|no|no| |152|Maximum Product Subarray|Medium|noNote|Java|no|no|no|no| |153|Find Minimum in Rotated Sorted Array|Medium|noNote|Java|no|no|no|no| |154|Find Minimum in Rotated Sorted Array II|Hard|noNote|Java|no|no|no|no| |155|Min Stack|Easy|noNote|Java|no|no|no|no| |156|Binary Tree Upside Down|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |157|Read N Characters Given Read4|Easy|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |158|Read N Characters Given Read4 II - Call multiple times|Hard|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |159|Longest Substring with At Most Two Distinct Characters|Hard|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |160|Intersection of Two Linked Lists|Easy|noNote|Java|Python|no|no|no| |161|One Edit Distance|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |162|Find Peak Element|Medium|noNote|Java|no|no|no|no| |163|Missing Ranges|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |164|Maximum Gap|Hard|noNote|Java|no|no|no|no| |165|Compare Version Numbers|Medium|noNote|Java|Python|no|no|no| |166|Fraction to Recurring Decimal|Medium|noNote|Java|no|no|no|no| |167|Two Sum II - Input array is sorted|Easy|noNote|Java|no|no|no|no| |168|Excel Sheet Column Title|Easy|noNote|Java|Python|no|no|no| |169|Majority Element|Easy|noNote|Java|Python|no|no|no| |170|Two Sum III - Data structure design|Easy|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |171|Excel Sheet Column Number|Easy|noNote|Java|Python|no|no|no| |172|Factorial Trailing Zeroes|Easy|noNote|Java|Python|no|no|no| |173|Binary Search Tree Iterator|Medium|noNote|Java|no|no|no|no| |174|Dungeon Game|Hard|noNote|no|no|no|no|no| |179|Largest Number|Medium|noNote|Java|Python|no|no|no| |186|Reverse Words in a String II|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |187|Repeated DNA Sequences|Medium|noNote|Java|no|no|no|no| |188|Best Time to Buy and Sell Stock IV|Hard|noNote|no|no|no|no|no| |189|Rotate Array|Easy|noNote|Java|Python|no|no|no| |190|Reverse Bits|Easy|noNote|Java|Python|no|no|no| |191|Number of 1 Bits|Easy|noNote|Java|Python|no|no|no| |198|House Robber|Easy|noNote|Java|Python|no|no|no| |199|Binary Tree Right Side View|Medium|noNote|Java|Python|no|no|no| |200|Number of Islands|Medium|noNote|Java|Python|no|no|no| |201|Bitwise AND of Numbers Range|Medium|noNote|Java|no|no|no|no| |202|Happy Number|Easy|noNote|Java|Python|no|no|no| |203|Remove Linked List Elements|Easy|noNote|Java|Python|no|no|no| |204|Count Primes|Easy|noNote|Java|no|no|no|no| |205|Isomorphic Strings|Easy|noNote|Java|Python|no|no|no| |206|Reverse Linked List|Easy|noNote|Java|Python|no|no|no| |207|Course Schedule|Medium|noNote|no|no|no|no|no| |208|Implement Trie (Prefix Tree)|Medium|noNote|Java|no|no|no|no| |209|Minimum Size Subarray Sum|Medium|noNote|no|no|no|no|no| |210|Course Schedule II|Medium|noNote|no|no|no|no|no| |211|Add and Search Word - Data structure design|Medium|noNote|no|no|no|no|no| |212|Word Search II|Hard|noNote|Java|no|no|no|no| |213|House Robber II|Medium|noNote|Java|Python|no|no|no| |214|Shortest Palindrome|Hard|noNote|no|no|no|no|no| |215|Kth Largest Element in an Array|Medium|noNote|Java|Python|no|no|no| |216|Combination Sum III|Medium|noNote|Java|Python|no|no|no| |217|Contains Duplicate|Easy|noNote|Java|Python|no|no|no| |218|The Skyline Problem|Hard|noNote|no|no|no|no|no| |219|Contains Duplicate II|Easy|noNote|Java|Python|no|no|no| |220|Contains Duplicate III|Medium|noNote|no|no|no|no|no| |221|Maximal Square|Medium|noNote|Java|no|no|no|no| |222|Count Complete Tree Nodes|Medium|noNote|Java|Python|no|no|no| |223|Rectangle Area|Medium|noNote|Java|Python|no|no|no| |224|Basic Calculator|Hard|noNote|no|no|no|no|no| |225|Implement Stack using Queues|Easy|noNote|Java|no|no|no|no| |226|Invert Binary Tree|Easy|noNote|Java|Python|Ruby|no|no| |227|Basic Calculator II|Medium|noNote|no|no|no|no|no| |228|Summary Ranges|Medium|noNote|Java|Python|no|no|no| |229|Majority Element II|Medium|noNote|Java|no|no|no|no| |230|Kth Smallest Element in a BST|Medium|noNote|Java|Python|Ruby|no|no| |231|Power of Two|Easy|noNote|Java|Python|no|no|no| |232|Implement Queue using Stacks|Easy|noNote|Java|no|no|no|no| |233|Number of Digit One|Hard|noNote|no|no|no|no|no| |234|Palindrome Linked List|Easy|noNote|Java|no|no|no|no| |235|Lowest Common Ancestor of a Binary Search Tree|Easy|noNote|Java|Python|no|no|no| |236|Lowest Common Ancestor of a Binary Tree|Medium|noNote|Java|Python|no|no|no| |237|Delete Node in a Linked List|Easy|noNote|Java|Python|no|no|no| |238|Product of Array Except Self|Medium|noNote|Java|Python|no|no|no| |239|Sliding Window Maximum|Hard|noNote|Java|Python|no|no|no| |240|Search a 2D Matrix II|Medium|noNote|Java|no|no|no|no| |241|Different Ways to Add Parentheses|Medium|noNote|no|no|no|no|no| |242|Valid Anagram|Easy|noNote|Java|Python|no|no|no| |243|Shortest Word Distance|Easy|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |244|Shortest Word Distance II|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |245|Shortest Word Distance III|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |246|Strobogrammatic Number|Easy|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |247|Strobogrammatic Number II|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |248|Strobogrammatic Number III|Hard|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |249|Group Shifted Strings|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |250|Count Univalue Subtrees|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |251|Flatten 2D Vector|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |252|Meeting Rooms|Easy|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |253|Meeting Rooms II|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |254|Factor Combinations|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |255|Verify Preorder Sequence in Binary Search Tree|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |256|Paint House|Easy|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |257|Binary Tree Paths|Easy|noNote|Java|Python|no|no|no| |258|Add Digits|Easy|noNote|Java|Python|no|no|no| |259|3Sum Smaller|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |260|Single Number III|Medium|noNote|Java|Python|no|no|no| |261|Graph Valid Tree|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |263|Ugly Number|Easy|noNote|Java|Python|no|no|no| |264|Ugly Number II|Medium|noNote|Java|no|no|no|no| |265|Paint House II|Hard|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |266|Palindrome Permutation|Easy|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |267|Palindrome Permutation II|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |268|Missing Number|Easy|noNote|Java|Python|no|no|no| |269|Alien Dictionary|Hard|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |270|Closest Binary Search Tree Value|Easy|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |271|Encode and Decode Strings|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |272|Closest Binary Search Tree Value II|Hard|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |273|Integer to English Words|Hard|noNote|Java|Python|no|no|no| |274|H-Index|Medium|noNote|Java|no|no|no|no| |275|H-Index II|Medium|noNote|Java|no|no|no|no| |276|Paint Fence|Easy|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |277|Find the Celebrity|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |278|First Bad Version|Easy|noNote|Java|Python|no|no|no| |279|Perfect Squares|Medium|noNote|Java|no|no|no|no| |280|Wiggle Sort|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |281|Zigzag Iterator|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |282|Expression Add Operators|Hard|noNote|no|no|no|no|no| |283|Move Zeroes|Easy|noNote|Java|Python|no|no|no| |284|Peeking Iterator|Medium|noNote|Java|no|no|no|no| |285|Inorder Successor in BST|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |286|Walls and Gates|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |287|Find the Duplicate Number|Medium|noNote|Java|Python|no|no|no| |288|Unique Word Abbreviation|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |289|Game of Life|Medium|noNote|Java|Python|no|no|no| |290|Word Pattern|Easy|noNote|Java|Python|no|no|no| |291|Word Pattern II|Hard|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |292|Nim Game|Easy|noNote|Java|Python|no|no|no| |293|Flip Game|Easy|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |294|Flip Game II|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |295|Find Median from Data Stream|Hard|noNote|Java|no|no|no|no| |296|Best Meeting Point|Hard|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |297|Serialize and Deserialize Binary Tree|Hard|noNote|Java|no|no|no|no| |298|Binary Tree Longest Consecutive Sequence|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |299|Bulls and Cows|Medium|noNote|Java|Python|no|no|no| |300|Longest Increasing Subsequence|Medium|noNote|Java|no|no|no|no| |301|Remove Invalid Parentheses|Hard|noNote|no|no|no|no|no| |302|Smallest Rectangle Enclosing Black Pixels|Hard|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |303|Range Sum Query - Immutable|Easy|noNote|Java|Python|no|no|no| |304|Range Sum Query 2D - Immutable|Medium|noNote|no|Python|no|no|no| |305|Number of Islands II|Hard|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |306|Additive Number|Medium|noNote|Java|Python|no|no|no| |307|Range Sum Query - Mutable|Medium|noNote|Java|no|no|no|no| |308|Range Sum Query 2D - Mutable|Hard|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |309|Best Time to Buy and Sell Stock with Cooldown|Medium|noNote|Java|no|no|no|no| |310|Minimum Height Trees|Medium|noNote|no|no|no|no|no| |311|Sparse Matrix Multiplication|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |312|Burst Balloons|Hard|noNote|no|no|no|no|no| |313|Super Ugly Number|Medium|noNote|no|no|no|no|no| |314|Binary Tree Vertical Order Traversal|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |315|Count of Smaller Numbers After Self|Hard|noNote|Java|Python|no|no|no| |316|Remove Duplicate Letters|Hard|noNote|Java|no|no|no|no| |317|Shortest Distance from All Buildings|Hard|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |318|Maximum Product of Word Lengths|Medium|noNote|Java|Python|no|no|no| |319|Bulb Switcher|Medium|noNote|Java|Python|no|no|no| |320|Generalized Abbreviation|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |321|Create Maximum Number|Hard|noNote|no|no|no|no|no| |322|Coin Change|Medium|noNote|Java|no|no|no|no| |323|Number of Connected Components in an Undirected Graph|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |324|Wiggle Sort II|Medium|noNote|no|Python|no|no|no| |325|Maximum Size Subarray Sum Equals k|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |326|Power of Three|Easy|noNote|Java|Python|no|no|no| |327|Count of Range Sum|Hard|noNote|no|no|no|no|no| |328|Odd Even Linked List|Medium|noNote|Java|Python|no|no|no| |329|Longest Increasing Path in a Matrix|Hard|noNote|Java|Python|no|no|no| |330|Patching Array|Hard|noNote|no|no|no|no|no| |331|Verify Preorder Serialization of a Binary Tree|Medium|noNote|Java|Python|no|no|no| |332|Reconstruct Itinerary|Medium|noNote|no|no|no|no|no| |333|Largest BST Subtree|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |334|Increasing Triplet Subsequence|Medium|noNote|Java|Python|no|no|no| |335|Self Crossing|Hard|noNote|no|no|no|no|no| |336|Palindrome Pairs|Hard|noNote|no|no|no|no|no| |337|House Robber III|Medium|noNote|Java|Python|no|no|no| |338|Counting Bits|Medium|noNote|Java|Python|no|no|no| |339|Nested List Weight Sum|Easy|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |340|Longest Substring with At Most K Distinct Characters|Hard|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |341|Flatten Nested List Iterator|Medium|noNote|Java|Python|no|no|no| |342|Power of Four|Easy|noNote|Java|Python|no|no|no| |343|Integer Break|Medium|noNote|Java|Python|no|no|no| |344|Reverse String|Easy|noNote|Java|Python|no|no|no| |345|Reverse Vowels of a String|Easy|noNote|Java|Python|no|no|no| |346|Moving Average from Data Stream|Easy|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |347|Top K Frequent Elements|Medium|noNote|Java|Python|no|no|no| |348|Design Tic-Tac-Toe|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |349|Intersection of Two Arrays|Easy|noNote|Java|no|no|no|no| |350|Intersection of Two Arrays II|Easy|noNote|Java|no|no|no|no| |351|Android Unlock Patterns|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |352|Data Stream as Disjoint Intervals|Hard|noNote|Java|no|no|no|no| |353|Design Snake Game|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |354|Russian Doll Envelopes|Hard|noNote|Java|no|no|no|no| |355|Design Twitter|Medium|noNote|Java|no|no|no|no| |356|Line Reflection|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |357|Count Numbers with Unique Digits|Medium|noNote|Java|no|no|no|no| |358|Rearrange String k Distance Apart|Hard|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |359|Logger Rate Limiter|Easy|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |360|Sort Transformed Array|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |361|Bomb Enemy|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |362|Design Hit Counter|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |363|Max Sum of Rectangle No Larger Than K|Hard|noNote|Java|no|no|no|no| |364|Nested List Weight Sum II|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |365|Water and Jug Problem|Medium|noNote|Java|no|no|no|no| |366|Find Leaves of Binary Tree|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |367|Valid Perfect Square|Easy|noNote|Java|no|no|no|no| |368|Largest Divisible Subset|Medium|noNote|Java|no|no|no|no| |369|Plus One Linked List|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |370|Range Addition|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |371|Sum of Two Integers|Easy|noNote|Java|no|no|no|no| |372|Super Pow|Medium|noNote|Java|no|no|no|no| |373|Find K Pairs with Smallest Sums|Medium|noNote|Java|no|no|no|no| |374|Guess Number Higher or Lower|Easy|noNote|Java|no|no|no|no| |375|Guess Number Higher or Lower II|Medium|noNote|Java|no|no|no|no| |376|Wiggle Subsequence|Medium|noNote|Java|no|no|no|no| |377|Combination Sum IV|Medium|noNote|Java|no|no|no|no| |378|Kth Smallest Element in a Sorted Matrix|Medium|noNote|Java|no|no|no|no| |379|Design Phone Directory|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |380|Insert Delete GetRandom O(1)|Medium|noNote|Java|no|no|no|no| |381|Insert Delete GetRandom O(1) - Duplicates allowed|Hard|noNote|Java|no|no|no|no| |382|Linked List Random Node|Medium|noNote|Java|no|no|no|no| |383|Ransom Note|Easy|noNote|Java|no|no|no|no| |384|Shuffle an Array|Medium|noNote|Java|no|no|no|no| |385|Mini Parser|Medium|noNote|Java|no|no|no|no| |386|Lexicographical Numbers|Medium|noNote|Java|no|no|no|no| |387|First Unique Character in a String|Easy|noNote|Java|no|no|no|no| |388|Longest Absolute File Path|Medium|noNote|Java|no|no|no|no| |389|Find the Difference|Easy|noNote|Java|no|no|no|no| |390|Elimination Game|Medium|noNote|Java|no|no|no|no| |391|Perfect Rectangle|Hard|noNote|Java|no|no|no|no| |392|Is Subsequence|Medium|noNote|Java|no|no|no|no| |393|UTF-8 Validation|Medium|noNote|Java|no|no|no|no| |394|Decode String|Medium|noNote|Java|no|no|no|no| |395|Longest Substring with At Least K Repeating Characters|Medium|noNote|Java|no|no|no|no| |396|Rotate Function|Medium|noNote|Java|no|no|no|no| |397|Integer Replacement|Medium|noNote|Java|no|no|no|no| |398|Random Pick Index|Medium|noNote|Java|no|no|no|no| |399|Evaluate Division|Medium|noNote|no|no|no|no|no| |400|Nth Digit|Easy|noNote|Java|no|no|no|no| |401|Binary Watch|Easy|noNote|Java|no|no|no|no| |402|Remove K Digits|Medium|noNote|Java|no|no|no|no| |403|Frog Jump|Hard|noNote|Java|no|no|no|no| |404|Sum of Left Leaves|Easy|noNote|Java|no|no|no|no| |405|Convert a Number to Hexadecimal|Easy|noNote|Java|no|no|no|no| |406|Queue Reconstruction by Height|Medium|noNote|Java|no|no|no|no| |407|Trapping Rain Water II|Hard|noNote|no|no|no|no|no| |408|Valid Word Abbreviation|Easy|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |409|Longest Palindrome|Easy|noNote|Java|no|no|no|no| |410|Split Array Largest Sum|Hard|noNote|no|no|no|no|no| |411|Minimum Unique Word Abbreviation|Hard|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |412|Fizz Buzz|Easy|noNote|no|no|no|no|no| |413|Arithmetic Slices|Medium|noNote|no|no|no|no|no| |414|Third Maximum Number|Easy|noNote|no|no|no|no|no| |415|Add Strings|Easy|noNote|Java|no|no|no|no| |416|Partition Equal Subset Sum|Medium|noNote|Java|no|no|no|no| |417|Pacific Atlantic Water Flow|Medium|noNote|Java|no|no|no|no| |418|Sentence Screen Fitting|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |419|Battleships in a Board|Medium|noNote|no|no|no|no|no| |420|Strong Password Checker|Hard|noNote|no|no|no|no|no| |421|Maximum XOR of Two Numbers in an Array|Medium|noNote|no|no|no|no|no| |422|Valid Word Square|Easy|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |423|Reconstruct Original Digits from English|Medium|noNote|no|no|no|no|no| |424|Longest Repeating Character Replacement|Medium|noNote|no|no|no|no|no| |425|Word Squares|Hard|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |432|All O`one Data Structure|Hard|noNote|no|no|no|no|no| |434|Number of Segments in a String|Easy|noNote|no|no|no|no|no| |435|Non-overlapping Intervals|Medium|noNote|no|no|no|no|no| |436|Find Right Interval|Medium|noNote|no|no|no|no|no| |437|Path Sum III|Easy|noNote|no|no|no|no|no| |438|Find All Anagrams in a String|Easy|noNote|no|no|no|no|no| |439|Ternary Expression Parser|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |440|K-th Smallest in Lexicographical Order|Hard|noNote|no|no|no|no|no| |441|Arranging Coins|Easy|noNote|no|no|no|no|no| |442|Find All Duplicates in an Array|Medium|noNote|no|no|no|no|no| |444|Sequence Reconstruction|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |445|Add Two Numbers II|Medium|noNote|no|no|no|no|no| |446|Arithmetic Slices II - Subsequence|Hard|noNote|no|no|no|no|no| |447|Number of Boomerangs|Easy|noNote|no|no|no|no|no| |448|Find All Numbers Disappeared in an Array|Easy|noNote|no|no|no|no|no| |449|Serialize and Deserialize BST|Medium|noNote|no|no|no|no|no| |450|Delete Node in a BST|Medium|noNote|no|no|no|no|no| |451|Sort Characters By Frequency|Medium|noNote|no|no|no|no|no| |452|Minimum Number of Arrows to Burst Balloons|Medium|noNote|no|no|no|no|no| |453|Minimum Moves to Equal Array Elements|Easy|noNote|no|no|no|no|no| |454|4Sum II|Medium|noNote|no|no|no|no|no| |455|Assign Cookies|Easy|noNote|no|no|no|no|no| |456|132 Pattern|Medium|noNote|no|no|no|no|no| |459|Repeated Substring Pattern|Easy|noNote|no|no|no|no|no| |460|LFU Cache|Hard|noNote|no|no|no|no|no| |461|Hamming Distance|Easy|noNote|no|no|no|no|no| |462|Minimum Moves to Equal Array Elements II|Medium|noNote|no|no|no|no|no| |463|Island Perimeter|Easy|noNote|no|no|no|no|no| |464|Can I Win|Medium|noNote|no|no|no|no|no| |465|Optimal Account Balancing|Hard|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |466|Count The Repetitions|Hard|noNote|no|no|no|no|no| |467|Unique Substrings in Wraparound String|Medium|noNote|no|no|no|no|no| |468|Validate IP Address|Medium|noNote|no|no|no|no|no| |469|Convex Polygon|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |471|Encode String with Shortest Length|Hard|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |472|Concatenated Words|Hard|noNote|no|no|no|no|no| |473|Matchsticks to Square|Medium|noNote|no|no|no|no|no| |474|Ones and Zeroes|Medium|noNote|no|no|no|no|no| |475|Heaters|Easy|noNote|no|no|no|no|no| |476|Number Complement|Easy|noNote|no|no|no|no|no| |477|Total Hamming Distance|Medium|noNote|no|no|no|no|no| |480|Sliding Window Median|Hard|noNote|no|no|no|no|no| |481|Magical String|Medium|noNote|no|no|no|no|no| |482|License Key Formatting|Medium|noNote|no|no|no|no|no| |483|Smallest Good Base|Hard|noNote|no|no|no|no|no| |484|Find Permutation|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |485|Max Consecutive Ones|Easy|noNote|no|no|no|no|no| |486|Predict the Winner|Medium|noNote|no|no|no|no|no| |487|Max Consecutive Ones II|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |488|Zuma Game|Hard|noNote|no|no|no|no|no| |490|The Maze|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |491|Increasing Subsequences|Medium|noNote|no|no|no|no|no| |492|Construct the Rectangle|Easy|noNote|no|no|no|no|no| |493|Reverse Pairs|Hard|noNote|no|no|no|no|no| |494|Target Sum|Medium|noNote|no|no|no|no|no| |495|Teemo Attacking|Medium|noNote|no|no|no|no|no| |496|Next Greater Element I|Easy|noNote|no|no|no|no|no| |498|Diagonal Traverse|Medium|noNote|no|no|no|no|no| |499|The Maze III|Hard|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |500|Keyboard Row|Easy|noNote|no|no|no|no|no| |501|Find Mode in Binary Search Tree|Easy|noNote|no|no|no|no|no| |502|IPO|Hard|noNote|no|no|no|no|no| |503|Next Greater Element II|Medium|noNote|no|no|no|no|no| |504|Base 7|Easy|noNote|no|no|no|no|no| |505|The Maze II|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |506|Relative Ranks|Easy|noNote|no|no|no|no|no| |508|Most Frequent Subtree Sum|Medium|noNote|no|no|no|no|no| |513|Find Bottom Left Tree Value|Medium|noNote|no|no|no|no|no| |514|Freedom Trail|Hard|noNote|no|no|no|no|no| |515|Find Largest Value in Each Tree Row|Medium|noNote|no|no|no|no|no| |516|Longest Palindromic Subsequence|Medium|noNote|no|no|no|no|no| |517|Super Washing Machines|Hard|noNote|no|no|no|no|no| |520|Detect Capital|Easy|noNote|no|no|no|no|no| |523|Continuous Subarray Sum|Medium|noNote|no|no|no|no|no| |524|Longest Word in Dictionary through Deleting|Medium|noNote|no|no|no|no|no| |525|Contiguous Array|Medium|noNote|no|no|no|no|no| |526|Beautiful Arrangement|Medium|noNote|no|no|no|no|no| |527|Word Abbreviation|Hard|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |529|Minesweeper|Medium|noNote|no|no|no|no|no| |530|Minimum Absolute Difference in BST|Easy|noNote|no|no|no|no|no| |531|Lonely Pixel I|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |532|K-diff Pairs in an Array|Easy|noNote|no|no|no|no|no| |533|Lonely Pixel II|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |535|Encode and Decode TinyURL|Medium|noNote|no|no|no|no|no| |536|Construct Binary Tree from String|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy| |538|Convert BST to Greater Tree|Medium|noNote|no|no|no|no|no| |539|Minimum Time Difference|Medium|noNote|no|no|no|no|no| |541|Reverse String II|Easy|noNote|no|no|no|no|no| |542|01 Matrix|Medium|noNote|no|no|no|no|no| |543|Diameter of Binary Tree|Easy|noNote|no|no|no|no|no| |544|Output Contest Matches|Medium|noBuy|noBuy|noBuy|noBuy|noBuy|noBuy|

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