LeetCode Solutions by wglacier

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Leetcode Algorithms Problems

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No.	Problems	Level	Solutions
1	0001. Two Sum	easy	source
2	0002. Add Two Numbers	medium	source
3	0003. Longest Substring Without Repeating Characters	medium	source
4	0004. Median of Two Sorted Arrays	hard	source
5	0005. Longest Palindromic Substring	medium	source
6	0006. ZigZag Conversion	medium	source
7	0007. Reverse Integer	easy	source
8	0008. String to Integer (atoi)	medium	source
9	0009. Palindrome Number	easy	source
10	0010. Regular Expression Matching	hard	source
11	0011. Container With Most Water	medium	source
12	0012. Integer to Roman	medium	source
13	0013. Roman to Integer	easy	source
14	0014. Longest Common Prefix	easy	source
15	0015. 3Sum	medium	source
16	0016. 3Sum Closest	medium	source
17	0017. Letter Combinations of a Phone Number	medium	source
18	0018. 4Sum	medium	source
19	0019. Remove Nth Node From End of List	medium	source
20	0020. Valid Parentheses	easy	source
21	0021. Merge Two Sorted Lists	easy	source
22	0022. Generate Parentheses	medium	source
23	0023. Merge k Sorted Lists	hard	source
24	0024. Swap Nodes in Pairs	medium	source
25	0025. Reverse Nodes in k-Group	hard	source
26	0026. Remove Duplicates from Sorted Array	easy	source
27	0027. Remove Element	easy	source
28	0028. Implement strstr	easy	source
29	0029. Divide Two Integers	medium	source
30	0030. Substring with Concatenation of All Words	hard	source
31	0031. Next Permutation	medium	source
32	0032. Longest Valid Parentheses	hard	source
33	0033. Search in Rotated Sorted Array	medium	source
34	0034. Find First and Last Position of Element in Sorted Array	medium	source
35	0035. Search Insert Position	easy	source
36	0036. Valid Sudoku	medium	source
37	0037. Sudoku Solver	hard	source
38	0038. Count and Say	easy	source
39	0039. Combination Sum	medium	source
40	0040. Combination Sum II	medium	source
41	0041. First Missing Positive	hard	source
42	0042. Trapping Rain Water	hard	source
43	0043. Multiply Strings	medium	source
44	0044. Wildcard Matching	hard	source
45	0045. Jump Game II	hard	source
46	0046. Permutations	medium	source
47	0047. Permutations II	medium	source
48	0048. Rotate Image	medium	source
49	0049. Group Anagrams	medium	source
50	0050. Pow(x, n)	medium	source
51	0051. N-Queens	hard	source
52	0052. N-Queens II	hard	source
53	0053. Maximum Subarray	easy	source
54	0054. Spiral Matrix	medium	source
55	0055. Jump Game	medium	source
56	0056. Merge Intervals	medium	source
57	0057. Insert Interval	hard	source
58	0058. Length of Last Word	medium	source
59	0059. Spiral Matrix II	medium	source
60	0060. Permutation Sequence	medium	source
61	0061. Rotate List	medium	source
62	0062. Unique Paths	medium	source
63	0063. Unique Paths II	medium	source
64	0064. Minimum Path Sum	medium	source
65	0065. Valid Number	hard	source
66	0066. Plus One	easy	source
67	0067. Add Binary	easy	source
68	0068. Text Justification	hard	source
69	0069. Sqrtx	easy	source
70	0070. Climbing Stairs	easy	source
71	0071. Simplify Path	medium	source
72	0072. Edit Distance	hard	source
73	0073. Set Matrix Zeroes	medium	source
74	0074. Search a 2D Matrix	medium	source
75	0075. Sort Colors	medium	source
76	0076. Minimum Window Substring	hard	source
77	0077. Combinations	medium	source
78	0078. Subsets	medium	source
79	0079. Word Search	medium	source
80	0080. Remove Duplicates from Sorted Array II	medium	source
81	0081. Search in Rotated Sorted Array II	medium	source
82	0082. Remove Duplicates from Sorted List II	medium	source
83	0083. Remove Duplicates from Sorted List	easy	source
84	0084. Largest Rectangle in Histogram	hard	source
85	0085. Maximal Rectangle	hard	source
86	0086. Partition List	medium	source
87	0087. Scramble String	hard	source
88	0088. Merge Sorted Array	easy	source
89	0089. Gray Code	medium	source
90	0091. Decode Ways	medium	source
91	0092. Reverse Linked List II	medium	source
92	0094. Binary Tree Inorder Traversal	medium	source
93	0095. Unique Binary Search Trees II	medium	source
94	0096. Unique Binary Search Trees	medium	source
95	0097. Interleaving String	hard	source
96	0098. Validate Binary Search Tree	medium	source
97	0099. Recover Binary Search Tree	hard	source
98	0100. Same Tree	easy	source
99	0101. Symmetric Tree		source
100	0102. Binary Tree Level Order Traversal	medium	source
101	0103. Binary Tree Zigzag Level Order Traversal	medium	source
102	0104. Maximum Depth of Binary Tree	easy	source
103	0105. Construct Binary Tree from Preorder and Inorder Traversal	medium	source
104	0107. Binary Tree Level Order Traversal II	easy	source
105	0108. Convert Sorted Array to Binary Search Tree	easy	source
106	0109. Convert Sorted List to Binary Search Tree	medium	source
107	0110. Balanced Binary Tree	easy	source
108	0111. Minimum Depth of Binary Tree	easy	source
109	0112. Path Sum	easy	source
110	0113. Path Sum II	medium	source
111	0114. Flatten Binary Tree to Linked List	medium	source
112	0115. Distinct Subsequences	hard	source
113	0116. Populating Next Right Pointers in Each Node	medium	source
114	0117. Populating Next Right Pointers in Each Node II	medium	source
115	0120. Triangle	medium	source
116	0121. Best Time to Buy and Sell Stock	easy	source
117	0122. Best Time to Buy and Sell Stock II	easy	source
118	0123. Best Time to Buy and Sell Stock III	hard	source
119	0124. Binary Tree Maximum Path Sum	hard	source
120	0127. Word Ladder	medium	source
121	0128. Longest Consecutive Sequence		source
122	0129. Sum Root to Leaf Numbers	medium	source
123	0130. Surrounded Regions	medium	source
124	0131. Palindrome Partitioning	medium	source
125	0133. Clone Graph	medium	source
126	0134. Gas Station	medium	source
127	0137. Single Number II	medium	source
128	0138. Copy List with Random Pointer	medium	source
129	0139. Word Break		source
130	0140. Word Break II		source
131	0142. Linked List Cycle II	medium	source
132	0143. Reorder List	medium	source
133	0144. Binary Tree Preorder Traversal	medium	source
134	0146. LRU Cache		source
135	0148. Sort List	medium	source
136	0150. Evaluate Reverse Polish Notation	medium	source
137	0151. Reverse Words in a String	medium	source
138	0152. Maximum Product Subarray	medium	source
139	0153. Find Minimum in Rotated Sorted Array	medium	source
140	0155. Min Stack	easy	source
141	0156. Binary Tree Upside Down	medium	source
142	0157. Read N Characters Given Read4	easy	source
143	0159. Longest Substring with At Most Two Distinct Characters	hard	source
144	0160. Intersection of Two Linked Lists	easy	source
145	0161. One Edit Distance	medium	source
146	0162. Find Peak Element, Medium		source
147	0163. Missing Ranges	medium	source
148	0165. Compare Version Numbers	medium	source
149	0166. Fraction to Recurring Decimal	medium	source
150	0169. Majority Element	easy	source
151	0170. Two Sum III - Data structure design	easy	source
152	0173. Binary Search Tree Iterator	medium	source
153	0186. Reverse Words in a String II	medium	source
154	0187. Repeated DNA Sequences	medium	source
155	0188. Best Time to Buy and Sell Stock IV	hard	source
156	0198. House Robber	easy	source
157	0200. Number of Islands, Medium	Medium	source
158	0207. Course Schedule	medium	source
159	0208. Implement Trie (Prefix Tree)	medium	source
160	0209. Minimum Size Subarray Sum	medium	source
161	0210. Course Schedule II	medium	source
162	0211. Add and Search Word - Data structure design	medium	source
163	0213. House Robber II	medium	source
164	0215. Kth Largest Element in an Array	medium	source
165	0218. The Skyline Problem	hard	source
166	0220. Contains Duplicate III	medium	source
167	0221. Maximal Square	medium	source
168	0222. Count Complete Tree Nodes	medium	source
169	0224. Basic Calculator		source
170	0227. Basic Calculator II	medium	source
171	0228. Summary Ranges		source
172	0229. Majority Element II	medium	source
173	0230. Kth Smallest Element in a BST	medium	source
174	0231. Power of Two		source
175	0236. Lowest Common Ancestor of a Binary Tree	medium	source
176	0238. Product of Array Except Self	medium	source
177	0240. Search a 2D Matrix II		source
178	0241. Different Ways to Add Parentheses	medium	source
179	0243. Shortest Word Distance	easy	source
180	0244. Shortest Word Distance II	medium	source
181	0245. Shortest Word Distance III	medium	source
182	0246. Strobogrammatic Number	easy	source
183	0247. Strobogrammatic Number II	medium	source
184	0248. Strobogrammatic Number III	hard	source
185	0249. Group Shifted Strings	medium	source
186	0250. Count Univalue Subtrees	medium	source
187	0251. Flatten 2D Vector	medium	source
188	0252. Meeting Rooms	easy	source
189	0253. Meeting Rooms II		source
190	0254. Factor Combinations	medium	source
191	0255. Verify Preorder Sequence in Binary Search Tree	medium	source
192	0256. Paint House	easy	source
193	0259. 3Sum Smaller	medium	source
194	0260. Single Number III	medium	source
195	0261. Graph Valid Tree	medium	source
196	0264. Ugly Number II	medium	source
197	0265. Paint House II	hard	source
198	0266. Palindrome Permutation	easy	source
199	0267. Palindrome Permutation II	medium	source
200	0270. Closest Binary Search Tree Value	easy	source
201	0271. Encode and Decode Strings	medium	source
202	0274. H-Index	medium	source
203	0276. Paint Fence	easy	source
204	0277. Find the Celebrity	medium	source
205	0279. Perfect Squares		source
206	0280. Wiggle Sort	medium	source
207	0281. Zigzag Iterator	medium	source
208	0284. Peeking Iterator	medium	source
209	0285. Inorder Successor in BST	medium	source
210	0286. Walls and Gates	medium	source
211	0287. Find the Duplicate Number	medium	source
212	0288. Unique Word Abbreviation	medium	source
213	0289. Game of Life		source
214	0293. Flip Game	easy	source
215	0294. Flip Game II	medium	source
216	0297. Serialize and Deserialize Binary Tree	hard	source
217	0298. Binary Tree Longest Consecutive Sequence	medium	source
218	0300. Longest Increasing Subsequence	medium	source
219	0304. Range Sum Query 2D - Immutable	medium	source
220	0307. Range Sum Query - Mutable	medium	source
221	0309. Best Time to Buy and Sell Stock with Cooldown	medium	source
222	0310. Minimum Height Trees	medium	source
223	0311. Sparse Matrix Multiplication	medium	source
224	0312. Burst Balloons		source
225	0313. Super Ugly Number	medium	source
226	0314. Binary Tree Vertical Order Traversal	medium	source
227	0315. Count of Smaller Numbers After Self	hard	source
228	0316. Remove Duplicate Letters	hard	source
229	0318. Maximum Product of Word Lengths	medium	source
230	0320. Generalized Abbreviation	medium	source
231	0322. Coin Change	medium	source
232	0323. Number of Connected Components in an Undirected Graph	medium	source
233	0324. Wiggle Sort II	medium	source
234	0325. Maximum Size Subarray Sum Equals k	medium	source
235	0326. Power of Three	easy	source
236	0328. Odd Even Linked List	medium	source
237	0331. Verify Preorder Serialization of a Binary Tree	medium	source
238	0332. Reconstruct Itinerary	medium	source
239	0333. Largest BST Subtree	medium	source
240	0334. Increasing Triplet Subsequence	medium	source
241	0336. Palindrome Pairs	hard	source
242	0337. House Robber III	medium	source
243	0339. Nested List Weight Sum	easy	source
244	0341. Flatten Nested List Iterator		source
245	0343. Integer Break	medium	source
246	0345. Reverse Vowels of a String		source
247	0346. Moving Average from Data Stream	easy	source
248	0347. Top K Frequent Elements	medium	source
249	0348. Design Tic-Tac-Toe	medium	source
250	0351. Android Unlock Patterns	medium	source
251	0353. Design Snake Game	medium	source
252	0356. Line Reflection	medium	source
253	0357. Count Numbers with Unique Digits	medium	source
254	0359. Logger Rate Limiter	easy	source
255	0360. Sort Transformed Array	medium	source
256	0361. Bomb Enemy	medium	source
257	0362. Design Hit Counter	medium	source
258	0364. Nested List Weight Sum II	medium	source
259	0365. Water and Jug Problem	medium	source
260	0366. Find Leaves of Binary Tree	medium	source
261	0368. Largest Divisible Subset	medium	source
262	0369. Plus One Linked List	medium	source
263	0370. Range Addition	medium	source
264	0373. Find K Pairs with Smallest Sums	medium	source
265	0375. Guess Number Higher or Lower II	medium	source
266	0377. Combination Sum IV	medium	source
267	0378. Kth Smallest Element in a Sorted Matrix	medium	source
268	0379. Design Phone Directory	medium	source
269	0380. Insert Delete GetRandom O(1)	medium	source
270	0382. Linked List Random Node	medium	source
271	0384. Shuffle an Array	medium	source
272	0385. Mini Parser	medium	source
273	0386. Lexicographical Numbers	medium	source
274	0387. First Unique Character in a String	easy	source
275	0388. Longest Absolute File Path	medium	source
276	0393. UTF-8 Validation	medium	source
277	0394. Decode String	medium	source
278	0395. Longest Substring with At Least K Repeating Characters	medium	source
279	0397. Integer Replacement	medium	source
280	0398. Random Pick Index	medium	source
281	0399. Evaluate Division	medium	source
282	0400. Nth Digit	easy	source
283	0402. Remove K Digits	medium	source
284	0406. Queue Reconstruction by Height	medium	source
285	0408. Valid Word Abbreviation	easy	source
286	0416. Partition Equal Subset Sum	medium	source
287	0417. Pacific Atlantic Water Flow	medium	source
288	0418. Sentence Screen Fitting	medium	source
289	0419. Battleships in a Board	medium	source
290	0421. Maximum XOR of Two Numbers in an Array		source
291	0422. Valid Word Square	easy	source
292	0424. Longest Repeating Character Replacement	medium	source
293	0426. Convert Binary Search Tree to Sorted Doubly Linked List	medium	source
294	0429. N-ary Tree Level Order Traversal	easy	source
295	0430. Flatten a Multilevel Doubly Linked List	medium	source
296	0433. Minimum Genetic Mutation	medium	source
297	0435. Non-overlapping Intervals	medium	source
298	0438. Find All Anagrams in a String	medium	source
299	0439. Ternary Expression Parser	medium	source
300	0442. Find All Duplicates in an Array	medium	source
301	0443. String Compression	easy	source
302	0444. Sequence Reconstruction	medium	source
303	0448. Find All Numbers Disappeared in an Array		source
304	0449. Serialize and Deserialize BST	medium	source
305	0450. Delete Node in a BST	medium	source
306	0451. Sort Characters By Frequency	medium	source
307	0457. Circular Array Loop	medium	source
308	0463. Island Perimeter	easy	source
309	0464. Can I Win	medium	source
310	0468. Validate IP Address	medium	source
311	0470. Implement Rand10() Using Rand7()	medium	source
312	0474. Ones and Zeroes	medium	source
313	0481. Magical String	medium	source
314	0484. Find Permutation		source
315	0485. Max Consecutive Ones	easy	source
316	0486. Predict the Winner	medium	source
317	0487. Max Consecutive Ones II		source
318	0490. The Maze	medium	source
319	0493. Reverse Pairs	hard	source
320	0494. Target Sum	medium	source
321	0497. Random Point in Non-overlapping Rectangles	medium	source
322	0498. Diagonal Traverse	medium	source
323	0503. Next Greater Element II	medium	source
324	0505. The Maze II	medium	source
325	0510. Inorder Successor in BST II	medium	source
326	0518. Coin Change 2	medium	source
327	0519. Random Flip Matrix	medium	source
328	0522. Longest Uncommon Subsequence II	medium	source
329	0523. Continuous Subarray Sum	medium	source
330	0524. Longest Word in Dictionary through Deleting	medium	source
331	0526. Beautiful Arrangement	medium	source
332	0528. Random Pick with Weight	medium	source
333	0529. Minesweeper	medium	source
334	0531. Lonely Pixel I	medium	source
335	0533. Lonely Pixel II	medium	source
336	0535. Encode and Decode TinyURL	medium	source
337	0536. Construct Binary Tree from String	medium	source
338	0540. Single Element in a Sorted Array	medium	source
339	0542. 01 Matrix	medium	source
340	0544. Output Contest Matches	medium	source
341	0545. Boundary of Binary Tree	medium	source
342	0547. Friend Circles	medium	source
343	0548. Split Array with Equal Sum	medium	source
344	0549. Binary Tree Longest Consecutive Sequence II	medium	source
345	0555. Split Concatenated Strings	medium	source
346	0560. Subarray Sum Equals K	medium	source
347	0562. Longest Line of Consecutive One in Matrix	medium	source
348	0565. Array Nesting	medium	source
349	0567. Permutation in String	medium	source
350	0573. Squirrel Simulation	medium	source
351	0582. Kill Process	medium	source
352	0583. Delete Operation for Two Strings	medium	source
353	0593. Valid Square	medium	source
354	0604. Design Compressed String Iterator	easy	source
355	0609. Find Duplicate File in System	medium	source
356	0616. Add Bold Tag in String	medium	source
357	0621. Task Scheduler		source
358	0622. Design Circular Queue	medium	source
359	0624. Maximum Distance in Arrays	easy	source
360	0625. Minimum Factorization	medium	source
361	0628. Maximum Product of Three Numbers	easy	source
362	0634. Find the Derangement of An Array	medium	source
363	0635. Design Log Storage System	medium	source
364	0636. Exclusive Time of Functions	medium	source
365	0638. Shopping Offers	medium	source
366	0640. Solve the Equation	medium	source
367	0644. Maximum Average Subarray II	hard	source
368	0647. Palindromic Substrings	medium	source
369	0651. 4 Keys Keyboard	medium	source
370	0652. Find Duplicate Subtrees	medium	source
371	0657. Robot Return to Origin	easy	source
372	0658. Find K Closest Elements	medium	source
373	0659. Split Array into Consecutive Subsequences	medium	source
374	0662. Maximum Width of Binary Tree	medium	source
375	0663. Equal Tree Partition	medium	source
376	0666. Path Sum IV	medium	source
377	0676. Implement Magic Dictionary	medium	source
378	0681. Next Closest Time	medium	source
379	0684. Redundant Connection	medium	source
380	0688. Knight Probability in Chessboard	medium	source
381	0692. Top K Frequent Words	medium	source
382	0694. Number of Distinct Islands	medium	source
383	0695. Max Area of Island	medium	source
384	0698. Partition to K Equal Sum Subsets	medium	source
385	0701. Insert into a Binary Search Tree	medium	source
386	0702. Search in a Sorted Array of Unknown Size	medium	source
387	0708. Insert into a Cyclic Sorted List	medium	source
388	0713. Subarray Product Less Than K	medium	source
389	0714. Best Time to Buy and Sell Stock with Transaction Fee	medium	source
390	0716. Max Stack	easy	source
391	0721. Accounts Merge	medium	source
392	0722. Remove Comments	medium	source
393	0723. Candy Crush	medium	source
394	0725. Split Linked List in Parts	medium	source
395	0729. My Calendar I	medium	source
396	0731. My Calendar II	medium	source
397	0734. Sentence Similarity	easy	source
398	0737. Sentence Similarity II	medium	source
399	0739. Daily Temperatures	medium	source
400	0742. Closest Leaf in a Binary Tree	medium	source
401	0743. Network Delay Time	medium	source
402	0750. Number Of Corner Rectangles	medium	source
403	0751. IP to CIDR	easy	source
404	0752. Open the Lock	medium	source
405	0755. Pour Water	medium	source
406	0756. Pyramid Transition Matrix	medium	source
407	0758. Bold Words in String	easy	source
408	0760. Find Anagram Mappings	easy	source
409	0764. Largest Plus Sign	medium	source
410	0767. Reorganize String	medium	source
411	0769. Max Chunks To Make Sorted	medium	source
412	0776. Split BST	medium	source
413	0777. Swap Adjacent in LR String	medium	source
414	0779. K-th Symbol in Grammar	medium	source
415	0785. Is Graph Bipartite	medium	source
416	0787. Cheapest Flights Within K Stops	medium	source
417	0789. Escape The Ghosts	medium	source
418	0790. Domino and Tromino Tiling	medium	source
419	0792. Number of Matching Subsequences	medium	source
420	0794. Valid Tic-Tac-Toe State	medium	source
421	0797. All Paths From Source to Target	medium	source
422	0799. Champagne Tower	medium	source
423	0800. Similar RGB Color	easy	source
424	0801. Minimum Swaps To Make Sequences Increasing	medium	source
425	0802. Find Eventual Safe States	medium	source
426	0807. Max Increase to Keep City Skyline	medium	source
427	0808. Soup Servings	medium	source
428	0809. Expressive Words	medium	source
429	0813. Largest Sum of Averages	medium	source
430	0816. Ambiguous Coordinates	medium	source
431	0817. Linked List Components	medium	source
432	0832. Flipping an Image	easy	source
433	0833. Find And Replace in String	medium	source
434	0835. Image Overlap	medium	source
435	0837. New 21 Game	medium	source
436	0838. Push Dominoes	medium	source
437	0841. Keys and Rooms	medium	source
438	0845. Longest Mountain in Array	medium	source
439	0846. Hand of Straights	medium	source
440	0853. Car Fleet	medium	source
441	0855. Exam Room	medium	source
442	0863. All Nodes Distance K in Binary Tree	medium	source
443	0875. Koko Eating Bananas	medium	source
444	0877. Stone Game	medium	source
445	0881. Boats to Save People	medium	source
446	0889. Construct Binary Tree from Preorder and Postorder Traversal	medium	source
447	0890. Find and Replace Pattern	medium	source
448	0894. All Possible Full Binary Trees	medium	source
449	0900. RLE Iterator	medium	source
450	0904. Fruit Into Baskets		source
451	0909. Snakes and Ladders	medium	source
452	0911. Online Election	medium	source
453	0916. Word Subsets	medium	source
454	0919. Complete Binary Tree Inserter	medium	source
455	0926. Flip String to Monotone Increasing	medium	source
456	0929. Unique Email Addresses	easy	source
457	0931. Minimum Falling Path Sum	medium	source
458	0934. Shortest Bridge	medium	source
459	0935. Knight Dialer	medium	source
460	0939. Minimum Area Rectangle	medium	source
461	0946. Validate Stack Sequences	medium	source
462	0947. Most Stones Removed with Same Row or Column	medium	source
463	0948. Bag of Tokens	medium	source
464	0950. Reveal Cards In Increasing Order	medium	source
465	0951. Flip Equivalent Binary Trees	medium	source
466	0954. Array of Doubled Pairs	medium	source
467	0955. Delete Columns to Make Sorted II	medium	source
468	0958. Check Completeness of a Binary Tree	medium	source
469	0962. Maximum Width Ramp	medium	source
470	0963. Minimum Area Rectangle II	medium	source
471	0973. K Closest Points to Origin	medium	source
472	0979. Distribute Coins in Binary Tree	medium	source
473	0981. Time Based Key-Value Store	medium	source
474	0986. Interval List Intersections	medium	source
475	0987. Vertical Order Traversal of a Binary Tree	medium	source
476	0988. Smallest String Starting From Leaf	medium	source
477	1004. Max Consecutive Ones III	medium	source
478	1007. Minimum Domino Rotations For Equal Row	medium	source
479	1011. Capacity To Ship Packages Within D Days	medium	source
480	1015. Smallest Integer Divisible by K	medium	source
481	1016. Binary String With Substrings Representing 1 To N	medium	source
482	1020. Number of Enclaves	medium	source
483	1023. Camelcase Matching	medium	source
484	1024. Video Stitching	medium	source
485	1025. Divisor Game	easy	source
486	1027. Longest Arithmetic Sequence	medium	source
487	1031. Maximum Sum of Two Non-Overlapping Subarrays	medium	source
488	1048. Longest String Chain	medium	source
489	1055. Shortest Way to Form String	medium	source
490	1056. Confusing Number	easy	source
491	1057. Campus Bikes	medium	source
492	1058. Minimize Rounding Error to Meet Target	medium	source
493	1059. All Paths from Source Lead to Destination	medium	source
494	1060. Missing Element in Sorted Array	medium	source
495	1061. Lexicographically Smallest Equivalent String	medium	source
496	1062. Longest Repeating Substring	medium	source
497	1064. Fixed Point	easy	source
498	1065. Index Pairs of a String	easy	source
499	1066. Campus Bikes II	medium	source
500	1079. Letter Tile Possibilities	medium	source
501	1085. Sum of Digits in the Minimum Number	easy	source
502	1086. High Five	easy	source
503	1087. Brace Expansion	medium	source
504	1088. Confusing Number II	hard	source
505	1090. Largest Values From Labels	medium	source
506	1091. Shortest Path in Binary Matrix	medium	source
507	1099. Two Sum Less Than K	easy	source
508	1100. Find K-Length Substrings With No Repeated Characters	medium	source
509	1101. The Earliest Moment When Everyone Become Friends	medium	source
510	1102. Path With Maximum Minimum Value	medium	source
511	1105. Filling Bookcase Shelves	medium	source
512	1110. Delete Nodes And Return Forest	medium	source
513	1118. Number of Days in a Month	easy	source
514	1119. Remove Vowels from a String	easy	source
515	1120. Maximum Average Subtree	medium	source
516	1133. Largest Unique Number	easy	source
517	1134. Armstrong Number	easy	source
518	1135. Connecting Cities With Minimum Cost	medium	source
519	1138. Alphabet Board Path	medium	source
520	1143. Longest Common Subsequence	medium	source
521	1144. Decrease Elements To Make Array Zigzag	medium	source
522	1145. Binary Tree Coloring Game	medium	source
523	1146. Snapshot Array	medium	source
524	1150. Check If a Number Is Majority Element in a Sorted Array	easy	source
525	1151. Minimum Swaps to Group All 1's Together	medium	source
526	1152. Analyze User Website Visit Pattern	medium	source
527	1155. Number of Dice Rolls With Target Sum	medium	source
528	1161. Maximum Level Sum of a Binary Tree	medium	source
529	1165. Single-Row Keyboard	easy	source
530	1167. Minimum Cost to Connect Sticks	medium	source
531	1176. Diet Plan Performance	easy	source
532	1182. Shortest Distance to Target Color	medium	source
533	1188. Design Bounded Blocking Queue	medium	source
534	1197. Minimum Knight Moves	medium	source
535	1209. Remove All Adjacent Duplicates in String II	medium	source
536	1218. Longest Arithmetic Subsequence of Given Difference	medium	source
537	1219. Path with Maximum Gold	medium	source
538	1233. Remove Sub-Folders from the Filesystem	medium	source
539	1245. Tree Diameter	medium	source
540	1254. Number of Closed Islands	medium	source
541	1261. Find Elements in a Contaminated Binary Tree	medium	source
542	1267. Count Servers that Communicate	medium	source
543	1272. Remove Interval	medium	source
544	1277. Count Square Submatrices with All Ones	medium	source
545	1286. Iterator for Combination	medium	source
546	1292. Maximum Side Length of a Square with Sum Less than or Equal to Threshold	medium	source
547	1296. Divide Array in Sets of K Consecutive Numbers	medium	source
548	1300. Sum of Mutated Array Closest to Target	medium	source
549	1302. Deepest Leaves Sum	medium	source
550	1314. Matrix Block Sum	medium	source