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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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leetcode for every language , sooner or later , I want

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