Problems | LeetCode OJ

#	Title	Acceptance	Difficulty
339	Nested List Weight Sum	54.5%	Easy
338	Counting Bits	55.8%	Medium
337	House Robber III	36.9%	Medium
336	Palindrome Pairs	18.6%	Hard
335	Self Crossing	18.0%	Medium
334	Increasing Triplet Subsequence	33.1%	Medium
333	Largest BST Subtree	26.4%	Medium
332	Reconstruct Itinerary	23.4%	Medium
331	Verify Preorder Serialization of a Binary Tree	31.4%	Medium
330	Patching Array	28.8%	Medium
329	Longest Increasing Path in a Matrix	30.7%	Hard
328	Odd Even Linked List	37.3%	Easy
327	Count of Range Sum	25.6%	Hard
326	Power of Three	35.9%	Easy
325	Maximum Size Subarray Sum Equals k	39.1%	Easy
324	Wiggle Sort II	21.9%	Medium
323	Number of Connected Components in an Undirected Graph	42.7%	Medium
322	Coin Change	24.7%	Medium
321	Create Maximum Number	20.3%	Hard
320	Generalized Abbreviation	40.1%	Medium
319	Bulb Switcher	40.2%	Medium
318	Maximum Product of Word Lengths	39.2%	Medium
317	Shortest Distance from All Buildings	30.9%	Hard
316	Remove Duplicate Letters	24.7%	Hard
315	Count of Smaller Numbers After Self	29.9%	Hard
314	Binary Tree Vertical Order Traversal	30.2%	Medium
313	Super Ugly Number	33.5%	Medium
312	Burst Balloons	35.8%	Hard
311	Sparse Matrix Multiplication	47.2%	Medium
310	Minimum Height Trees	26.6%	Medium
309	Best Time to Buy and Sell Stock with Cooldown	36.6%	Medium
308	Range Sum Query 2D - Mutable	21.7%	Hard
307	Range Sum Query - Mutable	17.2%	Medium
306	Additive Number	25.3%	Medium
305	Number of Islands II	33.8%	Hard
304	Range Sum Query 2D - Immutable	22.0%	Medium
303	Range Sum Query - Immutable	24.4%	Easy
302	Smallest Rectangle Enclosing Black Pixels	39.0%	Hard
301	Remove Invalid Parentheses	31.6%	Hard
300	Longest Increasing Subsequence	34.2%	Medium
299	Bulls and Cows	29.2%	Easy
298	Binary Tree Longest Consecutive Sequence	36.5%	Medium
297	Serialize and Deserialize Binary Tree	27.4%	Hard
296	Best Meeting Point	46.5%	Hard
295	Find Median from Data Stream	21.8%	Hard
294	Flip Game II	41.1%	Medium
293	Flip Game	49.4%	Easy
292	Nim Game	52.5%	Easy
291	Word Pattern II	34.6%	Hard
290	Word Pattern	28.8%	Easy
289	Game of Life	33.9%	Medium
288	Unique Word Abbreviation	15.7%	Easy
287	Find the Duplicate Number	38.3%	Hard
286	Walls and Gates	36.9%	Medium
285	Inorder Successor in BST	35.4%	Medium
284	Peeking Iterator	33.3%	Medium
283	Move Zeroes	43.8%	Easy
282	Expression Add Operators	24.4%	Hard
281	Zigzag Iterator	42.2%	Medium
280	Wiggle Sort	49.5%	Medium
279	Perfect Squares	32.1%	Medium
278	First Bad Version	22.2%	Easy
277	Find the Celebrity	34.9%	Medium
276	Paint Fence	30.7%	Easy
275	H-Index II	32.5%	Medium
274	H-Index	29.2%	Medium
273	Integer to English Words	18.5%	Hard
272	Closest Binary Search Tree Value II	32.6%	Hard
271	Encode and Decode Strings	27.0%	Medium
270	Closest Binary Search Tree Value	34.0%	Easy
269	Alien Dictionary	22.6%	Hard
268	Missing Number	39.8%	Medium
267	Palindrome Permutation II	27.4%	Medium
266	Palindrome Permutation	50.2%	Easy
265	Paint House II	35.4%	Hard
264	Ugly Number II	27.5%	Medium
263	Ugly Number	36.3%	Easy
261	Graph Valid Tree	32.3%	Medium
260	Single Number III	43.3%	Medium
259	3Sum Smaller	38.0%	Medium
258	Add Digits	48.3%	Easy
257	Binary Tree Paths	28.0%	Easy
256	Paint House	42.2%	Medium
255	Verify Preorder Sequence in Binary Search Tree	37.1%	Medium
254	Factor Combinations	34.5%	Medium
253	Meeting Rooms II	34.4%	Medium
252	Meeting Rooms	41.5%	Easy
251	Flatten 2D Vector	33.4%	Medium
250	Count Univalue Subtrees	36.2%	Medium
249	Group Shifted Strings	31.4%	Easy
248	Strobogrammatic Number III	26.4%	Hard
247	Strobogrammatic Number II	33.9%	Medium
246	Strobogrammatic Number	36.1%	Easy
245	Shortest Word Distance III	45.8%	Medium
244	Shortest Word Distance II	35.2%	Medium
243	Shortest Word Distance	46.2%	Easy
242	Valid Anagram	41.5%	Easy
241	Different Ways to Add Parentheses	34.2%	Medium
240	Search a 2D Matrix II	34.1%	Medium
239	Sliding Window Maximum	26.9%	Hard
238	Product of Array Except Self	42.2%	Medium
237	Delete Node in a Linked List	43.6%	Easy
236	Lowest Common Ancestor of a Binary Tree	28.7%	Medium
235	Lowest Common Ancestor of a Binary Search Tree	37.9%	Easy
234	Palindrome Linked List	27.7%	Easy
233	Number of Digit One	24.3%	Hard
232	Implement Queue using Stacks	33.9%	Easy
231	Power of Two	36.1%	Easy
230	Kth Smallest Element in a BST	37.1%	Medium
229	Majority Element II	25.5%	Medium
228	Summary Ranges	23.9%	Easy
227	Basic Calculator II	24.6%	Medium
226	Invert Binary Tree	44.9%	Easy
225	Implement Stack using Queues	30.5%	Easy
224	Basic Calculator	21.8%	Medium
223	Rectangle Area	29.6%	Easy
222	Count Complete Tree Nodes	24.7%	Medium
221	Maximal Square	23.3%	Medium
220	Contains Duplicate III	18.4%	Medium
219	Contains Duplicate II	29.7%	Easy
218	The Skyline Problem	21.7%	Hard
217	Contains Duplicate	40.9%	Easy
216	Combination Sum III	35.2%	Medium
215	Kth Largest Element in an Array	32.7%	Medium
214	Shortest Palindrome	19.5%	Hard
213	House Robber II	30.3%	Medium
212	Word Search II	19.0%	Hard
211	Add and Search Word - Data structure design	20.3%	Medium
210	Course Schedule II	21.0%	Medium
209	Minimum Size Subarray Sum	26.6%	Medium
208	Implement Trie (Prefix Tree)	25.3%	Medium
207	Course Schedule	26.6%	Medium
206	Reverse Linked List	39.0%	Easy
205	Isomorphic Strings	29.2%	Easy
204	Count Primes	24.0%	Easy
203	Remove Linked List Elements	28.4%	Easy
202	Happy Number	36.2%	Easy
201	Bitwise AND of Numbers Range	30.0%	Medium
200	Number of Islands	27.4%	Medium
199	Binary Tree Right Side View	33.9%	Medium
198	House Robber	33.9%	Easy
191	Number of 1 Bits	37.6%	Easy
190	Reverse Bits	29.2%	Easy
189	Rotate Array	20.9%	Easy
188	Best Time to Buy and Sell Stock IV	22.0%	Hard
187	Repeated DNA Sequences	24.8%	Medium
186	Reverse Words in a String II	29.2%	Medium
179	Largest Number	18.8%	Medium
174	Dungeon Game	20.6%	Hard
173	Binary Search Tree Iterator	34.2%	Medium
172	Factorial Trailing Zeroes	32.4%	Easy
171	Excel Sheet Column Number	41.1%	Easy
170	Two Sum III - Data structure design	24.0%	Easy
169	Majority Element	40.8%	Easy
168	Excel Sheet Column Title	21.4%	Easy
167	Two Sum II - Input array is sorted	47.7%	Medium
166	Fraction to Recurring Decimal	14.9%	Medium
165	Compare Version Numbers	17.3%	Easy
164	Maximum Gap	26.5%	Hard
163	Missing Ranges	29.0%	Medium
162	Find Peak Element	32.9%	Medium
161	One Edit Distance	28.2%	Medium
160	Intersection of Two Linked Lists	30.2%	Easy
159	Longest Substring with At Most Two Distinct Characters	34.3%	Hard
158	Read N Characters Given Read4 II - Call multiple times	23.3%	Hard
157	Read N Characters Given Read4	29.5%	Easy
156	Binary Tree Upside Down	38.0%	Medium
155	Min Stack	21.9%	Easy
154	Find Minimum in Rotated Sorted Array II	34.2%	Hard
153	Find Minimum in Rotated Sorted Array	35.9%	Medium
152	Maximum Product Subarray	21.9%	Medium
151	Reverse Words in a String	15.7%	Medium
150	Evaluate Reverse Polish Notation	23.3%	Medium
149	Max Points on a Line	14.2%	Hard
148	Sort List	24.6%	Medium
147	Insertion Sort List	29.1%	Medium
146	LRU Cache	15.8%	Hard
145	Binary Tree Postorder Traversal	35.1%	Hard
144	Binary Tree Preorder Traversal	39.5%	Medium
143	Reorder List	22.6%	Medium
142	Linked List Cycle II	31.5%	Medium
141	Linked List Cycle	36.9%	Medium
140	Word Break II	19.6%	Hard
139	Word Break	25.0%	Medium
138	Copy List with Random Pointer	26.0%	Hard
137	Single Number II	37.4%	Medium
136	Single Number	49.3%	Medium
135	Candy	22.2%	Hard
134	Gas Station	27.2%	Medium
133	Clone Graph	24.8%	Medium
132	Palindrome Partitioning II	21.5%	Hard
131	Palindrome Partitioning	27.6%	Medium
130	Surrounded Regions	16.0%	Medium
129	Sum Root to Leaf Numbers	32.4%	Medium
128	Longest Consecutive Sequence	31.9%	Hard
127	Word Ladder	19.6%	Medium
126	Word Ladder II	13.6%	Hard
125	Valid Palindrome	23.6%	Easy
124	Binary Tree Maximum Path Sum	23.2%	Hard
123	Best Time to Buy and Sell Stock III	26.1%	Hard
122	Best Time to Buy and Sell Stock II	42.0%	Medium
121	Best Time to Buy and Sell Stock	35.8%	Medium
120	Triangle	29.9%	Medium
119	Pascal's Triangle II	32.0%	Easy
118	Pascal's Triangle	33.1%	Easy
117	Populating Next Right Pointers in Each Node II	32.7%	Hard
116	Populating Next Right Pointers in Each Node	36.5%	Medium
115	Distinct Subsequences	28.6%	Hard
114	Flatten Binary Tree to Linked List	30.8%	Medium
113	Path Sum II	28.1%	Medium
112	Path Sum	31.1%	Easy
111	Minimum Depth of Binary Tree	30.5%	Easy
110	Balanced Binary Tree	33.8%	Easy
109	Convert Sorted List to Binary Search Tree	30.2%	Medium
108	Convert Sorted Array to Binary Search Tree	36.9%	Medium
107	Binary Tree Level Order Traversal II	33.6%	Easy
106	Construct Binary Tree from Inorder and Postorder Traversal	28.8%	Medium
105	Construct Binary Tree from Preorder and Inorder Traversal	28.4%	Medium
104	Maximum Depth of Binary Tree	47.6%	Easy
103	Binary Tree Zigzag Level Order Traversal	28.4%	Medium
102	Binary Tree Level Order Traversal	32.4%	Easy
101	Symmetric Tree	33.7%	Easy
100	Same Tree	43.1%	Easy
99	Recover Binary Search Tree	26.2%	Hard
98	Validate Binary Search Tree	20.9%	Medium
97	Interleaving String	22.3%	Hard
96	Unique Binary Search Trees	37.2%	Medium
95	Unique Binary Search Trees II	28.9%	Medium
94	Binary Tree Inorder Traversal	39.3%	Medium
93	Restore IP Addresses	23.2%	Medium
92	Reverse Linked List II	27.7%	Medium
91	Decode Ways	17.4%	Medium
90	Subsets II	30.3%	Medium
89	Gray Code	36.0%	Medium
88	Merge Sorted Array	30.0%	Easy
87	Scramble String	26.3%	Hard
86	Partition List	29.3%	Medium
85	Maximal Rectangle	23.3%	Hard
84	Largest Rectangle in Histogram	24.0%	Hard
83	Remove Duplicates from Sorted List	36.5%	Easy
82	Remove Duplicates from Sorted List II	26.7%	Medium
81	Search in Rotated Sorted Array II	31.9%	Medium
80	Remove Duplicates from Sorted Array II	32.5%	Medium
79	Word Search	22.7%	Medium
78	Subsets	31.1%	Medium
77	Combinations	33.9%	Medium
76	Minimum Window Substring	21.0%	Hard
75	Sort Colors	34.5%	Medium
74	Search a 2D Matrix	33.6%	Medium
73	Set Matrix Zeroes	33.3%	Medium
72	Edit Distance	28.4%	Hard
71	Simplify Path	21.7%	Medium
70	Climbing Stairs	36.5%	Easy
69	Sqrt(x)	25.1%	Medium
68	Text Justification	16.0%	Hard
67	Add Binary	27.2%	Easy
66	Plus One	33.2%	Easy
65	Valid Number	12.0%	Hard
64	Minimum Path Sum	34.6%	Medium
63	Unique Paths II	29.2%	Medium
62	Unique Paths	35.9%	Medium
61	Rotate List	22.8%	Medium
60	Permutation Sequence	24.9%	Medium
59	Spiral Matrix II	34.6%	Medium
58	Length of Last Word	29.1%	Easy
57	Insert Interval	23.6%	Hard
56	Merge Intervals	25.1%	Hard
55	Jump Game	28.1%	Medium
54	Spiral Matrix	22.3%	Medium
53	Maximum Subarray	36.4%	Medium
52	N-Queens II	39.0%	Hard
51	N-Queens	26.2%	Hard
50	Pow(x, n)	27.9%	Medium
49	Group Anagrams	27.2%	Medium
48	Rotate Image	34.4%	Medium
47	Permutations II	27.8%	Medium
46	Permutations	35.3%	Medium
45	Jump Game II	25.2%	Hard
44	Wildcard Matching	17.3%	Hard
43	Multiply Strings	23.2%	Medium
42	Trapping Rain Water	32.0%	Hard
41	First Missing Positive	23.7%	Hard
40	Combination Sum II	27.4%	Medium
39	Combination Sum	30.6%	Medium
38	Count and Say	28.6%	Easy
37	Sudoku Solver	24.6%	Hard
36	Valid Sudoku	30.3%	Easy
35	Search Insert Position	37.1%	Medium
34	Search for a Range	29.0%	Medium
33	Search in Rotated Sorted Array	30.2%	Hard
32	Longest Valid Parentheses	22.3%	Hard
31	Next Permutation	26.3%	Medium
30	Substring with Concatenation of All Words	20.7%	Hard
29	Divide Two Integers	15.6%	Medium
28	Implement strStr()	24.7%	Easy
27	Remove Element	33.5%	Easy
26	Remove Duplicates from Sorted Array	33.2%	Easy
25	Reverse Nodes in k-Group	27.3%	Hard
24	Swap Nodes in Pairs	35.0%	Easy
23	Merge k Sorted Lists	23.2%	Hard
22	Generate Parentheses	36.5%	Medium
21	Merge Two Sorted Lists	35.2%	Easy
20	Valid Parentheses	29.1%	Easy
19	Remove Nth Node From End of List	29.2%	Easy
18	4Sum	23.5%	Medium
17	Letter Combinations of a Phone Number	28.4%	Medium
16	3Sum Closest	28.8%	Medium
15	3Sum	18.6%	Medium
14	Longest Common Prefix	27.9%	Easy
13	Roman to Integer	38.9%	Easy
12	Integer to Roman	38.3%	Medium
11	Container With Most Water	34.3%	Medium
10	Regular Expression Matching	21.8%	Hard
9	Palindrome Number	31.4%	Easy
8	String to Integer (atoi)	13.4%	Easy
7	Reverse Integer	23.6%	Easy
6	ZigZag Conversion	23.7%	Easy
5	Longest Palindromic Substring	22.9%	Medium
4	Median of Two Sorted Arrays	18.4%	Hard
3	Longest Substring Without Repeating Characters	21.8%	Medium
2	Add Two Numbers	22.7%	Medium
1	Two Sum	22.4%	Easy

Announcement

CONGRATULATIONS