GitHub - Ginkgo001/leetcode: LeetCode Problems' Solutions

###LeetCode Algorithm

(Notes: "♥" means you need buy a book from Leetcode)

# Title Solution Difficulty

292 Nim Game C++ Easy

290 Word Pattern C++ Easy

287 Find the Duplicate Number C++ Hard

285 Inorder Successor in BST ♥ Java Medium

283 Move Zeroes C++ Easy

279 Perfect Squares C++ Medium

278 First Bad Version C++, Java Easy

274 H-Index C++ Medium

273 Integer to English Words C++ Medium

268 Missing Number C++ Medium

264 Ugly Number II C++ Medium

263 Ugly Number C++ Easy

258 Add Digits C++ Easy

242 Valid Anagram C++ Easy

241 Different Ways to Add Parentheses C++ Medium

240 Search a 2D Matrix II C++ Medium

239 Sliding Window Maximum C++ Hard

238 Product of Array Except Self C++ Medium

237 Delete Node in a Linked List C++ Easy

236 Lowest Common Ancestor of a Binary Tree C++, Java Medium

235 Lowest Common Ancestor of a Binary Search Tree C++ Easy

234 Palindrome Linked List C++ Easy

233 Number of Digit One C++ Medium

232 Implement Queue using Stacks C++ Easy

231 Power of Two C++ Easy

230 Kth Smallest Element in a BST C++ Medium

229 Majority Element II C++ Medium

228 Summary Ranges C++ Easy

227 Basic Calculator II C++ Medium

226 Invert Binary Tree C++ Easy

225 Implement Stack using Queues C++ Medium

224 Basic Calculator C++ Medium

223 Rectangle Area C++ Easy

222 Count Complete Tree Nodes C++ Medium

221 Maximal Square C++ Medium

220 Contains Duplicate III C++ Medium

219 Contains Duplicate II C++ Easy

218 The Skyline Problem C++ Hard

217 Contains Duplicate C++ Easy

216 Combination Sum III C++ Medium

215 Kth Largest Element in an Array C++ Medium

214 Shortest Palindrome C++ Hard

213 House Robber II C++ Medium

212 Word Search II C++ Hard

211 Add and Search Word - Data structure design C++ Medium

210 Course Schedule II C++ Medium

209 Minimum Size Subarray Sum C++ Medium

208 Implement Trie (Prefix Tree) C++ Medium

207 Course Schedule C++ Medium

206 Reverse Linked List C++ Easy

205 Isomorphic Strings C++ Easy

204 Count Primes C++ Easy

203 Remove Linked List Elements C++ Easy

202 Happy Number C++ Easy

201 Bitwise AND of Numbers Range C++ Medium

200 Number of Islands C++ Medium

199 Binary Tree Right Side View C++ Medium

198 House Robber C++ Easy

191 Number of 1 Bits C++ Easy

190 Reverse Bits C++ Easy

189 Rotate Array C++ Easy

188 Best Time to Buy and Sell Stock IV C++ Hard

187 Repeated DNA Sequences C++ Medium

186 Reverse Words in a String II ♥ C++ Medium

179 Largest Number C++ Medium

174 Dungeon Game C++ Hard

173 Binary Search Tree Iterator C++, Java Medium

172 Factorial Trailing Zeroes C++ Easy

171 Excel Sheet Column Number C++ Easy

170 Two Sum III - Data structure design ♥ C++ Easy

169 Majority Element C++ Easy

168 Excel Sheet Column Title C++ Easy

167 Two Sum II - Input array is sorted ♥ C++ Medium

166 Fraction to Recurring Decimal C++ Medium

165 Compare Version Numbers C++ Easy

164 Maximum Gap C++ Hard

163 Missing Ranges ♥ C++ Medium

162 Find Peak Element C++, Java Medium

161 One Edit Distance♥ C++ Medium

160 Intersection of Two Linked Lists C++ Easy

159 Longest Substring with At Most Two Distinct Characters ♥ C++ Hard

158 Read N Characters Given Read4 II - Call multiple times ♥ C++ Hard

157 Read N Characters Given Read4 ♥ C++ Easy

156 Binary Tree Upside Down ♥ C++ Medium

155 Min Stack C++ Easy

154 Find Minimum in Rotated Sorted Array II C++ Hard

153 Find Minimum in Rotated Sorted Array C++, Java Medium

152 Maximum Product Subarray C++ Medium

151 Reverse Words in a String C++ Medium

150 Evaluate Reverse Polish Notation C++ Medium

149 Max Points on a Line C++ Hard

148 Sort List C++ Medium

147 Insertion Sort List C++ Medium

146 LRU Cache C++ Hard

145 Binary Tree Postorder Traversal C++ Hard

144 Binary Tree Preorder Traversal C++, Java Medium

143 Reorder List C++ Medium

142 Linked List Cycle II C++ Medium

141 Linked List Cycle C++ Medium

140 Word Break II C++ Hard

139 Word Break C++ Medium

138 Copy List with Random Pointer C++ Hard

137 Single Number II C++ Medium

136 Single Number C++ Medium

135 Candy C++ Hard

134 Gas Station C++ Medium

133 Clone Graph C++ Medium

132 Palindrome Partitioning II C++ Hard

131 Palindrome Partitioning C++ Medium

130 Surrounded Regions C++ Medium

129 Sum Root to Leaf Numbers C++ Medium

128 Longest Consecutive Sequence C++ Hard

127 Word Ladder C++ Medium

126 Word Ladder II C++ Hard

125 Valid Palindrome C++ Easy

124 Binary Tree Maximum Path Sum C++, Java Hard

123 Best Time to Buy and Sell Stock III C++ Hard

122 Best Time to Buy and Sell Stock II C++ Medium

121 Best Time to Buy and Sell Stock C++ Medium

120 Triangle C++, Java Medium

119 Pascal's Triangle II C++ Easy

118 Pascal's Triangle C++ Easy

117 Populating Next Right Pointers in Each Node II C++ Hard

116 Populating Next Right Pointers in Each Node C++ Medium

115 Distinct Subsequences C++ Hard

114 Flatten Binary Tree to Linked List C++ Medium

113 Path Sum II C++ Medium

112 Path Sum C++ Easy

111 Minimum Depth of Binary Tree C++ Easy

110 Balanced Binary Tree C++, Java Easy

109 Convert Sorted List to Binary Search Tree C++ Medium

108 Convert Sorted Array to Binary Search Tree C++ Medium

107 Binary Tree Level Order Traversal II C++ Easy

106 Construct Binary Tree from Inorder and Postorder Traversal C++ Medium

105 Construct Binary Tree from Preorder and Inorder Traversal C++ Medium

104 Maximum Depth of Binary Tree C++, Java Easy

103 Binary Tree Zigzag Level Order Traversal C++ Medium

102 Binary Tree Level Order Traversal C++, Java Easy

101 Symmetric Tree C++ Easy

100 Same Tree C++ Easy

99 Recover Binary Search Tree C++ Hard

98 Validate Binary Search Tree C++, Java Medium

97 Interleaving String C++ Hard

96 Unique Binary Search Trees C++ Medium

95 Unique Binary Search Trees II C++ Medium

94 Binary Tree Inorder Traversal C++ Medium

93 Restore IP Addresses C++ Medium

92 Reverse Linked List II C++ Medium

91 Decode Ways C++ Medium

90 Subsets II C++, Java Medium

89 Gray Code C++ Medium

88 Merge Sorted Array C++ Easy

87 Scramble String C++ Hard

86 Partition List C++ Medium

85 Maximal Rectangle C++ Hard

84 Largest Rectangle in Histogram C++ Hard

83 Remove Duplicates from Sorted List C++ Easy

82 Remove Duplicates from Sorted List II C++ Medium

81 Search in Rotated Sorted Array II C++ Medium

80 Remove Duplicates from Sorted Array II C++ Medium

79 Word Search C++ Medium

78 Subsets C++, Java Medium

77 Combinations C++ Medium

76 Minimum Window Substring C++ Hard

75 Sort Colors C++ Medium

74 Search a 2D Matrix C++, Java Medium

73 Set Matrix Zeroes C++ Medium

72 Edit Distance C++ Hard

71 Simplify Path C++ Medium

70 Climbing Stairs C++, Java Easy

69 Sqrt(x) C++ Medium

68 Text Justification C++ Hard

67 Add Binary C++ Easy

66 Plus One C++ Easy

65 Valid Number C++ Easy

64 Minimum Path Sum C++, Java Medium

63 Unique Paths II C++, Java Medium

62 Unique Paths C++, Java Medium

61 Rotate List C++ Medium

60 Permutation Sequence C++ Medium

59 Spiral Matrix II C++ Medium

58 Length of Last Word C++ Easy

57 Insert Interval C++ Hard

56 Merge Intervals C++ Hard

55 Jump Game C++ Medium

54 Spiral Matrix C++ Medium

53 Maximum Subarray C++ Medium

52 N-Queens II C++ Hard

51 N-Queens C++ Hard

50 "Pow(x, n)" C++ Medium

49 Group Anagrams C++ Medium

48 Rotate Image C++ Medium

47 Permutations II C++ Hard

46 Permutations C++ Medium

45 Jump Game II C++ Hard

44 Wildcard Matching C++ Hard

43 Multiply Strings C++ Medium

42 Trapping Rain Water C++ Hard

41 First Missing Positive C++ Hard

40 Combination Sum II C++ Medium

39 Combination Sum C++ Medium

38 Count and Say C++ Easy

37 Sudoku Solver C++ Hard

36 Valid Sudoku C++ Easy

35 Search Insert Position C++, Java Medium

34 Search for a Range C++, Java Medium

33 Search in Rotated Sorted Array C++, Java Hard

32 Longest Valid Parentheses C++ Hard

31 Next Permutation C++ Medium

30 Substring with Concatenation of All Words C++ Hard

29 Divide Two Integers C++ Medium

28 Implement strStr() C++, Java Easy

27 Remove Element C++ Easy

26 Remove Duplicates from Sorted Array C++ Easy

25 Reverse Nodes in k-Group C++ Hard

24 Swap Nodes in Pairs C++ Medium

23 Merge k Sorted Lists C++ Hard

22 Generate Parentheses C++ Medium

21 Merge Two Sorted Lists C++ Easy

20 Valid Parentheses C++ Easy

19 Remove Nth Node From End of List C++ Easy

18 4Sum C++ Medium

17 Letter Combinations of a Phone Number C++ Medium

16 3Sum Closest C++ Medium

15 3Sum C++ Medium

14 Longest Common Prefix C++ Easy

13 Roman to Integer C++ Easy

12 Integer to Roman C++ Medium

11 Container With Most Water C++ Medium

10 Regular Expression Matching C++ Hard

9 Palindrome Number C++ Easy

8 String to Integer (atoi) C++ Easy

7 Reverse Integer C++ Easy

6 ZigZag Conversion C++ Easy

5 Longest Palindromic Substring C++ Medium

4 Median of Two Sorted Arrays C++ Hard

3 Longest Substring Without Repeating Characters C++ Medium

2 Add Two Numbers C++ Medium

1 Two Sum C++ Medium

###LeetCode Shell

# Title Solution Difficulty

4 Tenth Line Bash Easy

3 Transpose File Bash Medium

2 Valid Phone Numbers Bash Easy

1 Word Frequency Bash Medium

###LintCode

# Title Solution Difficulty

1 Search in a big sorted array Java Medium

2 Search Range in Binary Search Tree Java Medium

Name		Name	Last commit message	Last commit date
Latest commit History 253 Commits
algorithms		algorithms
scripts		scripts
shell		shell
.gitignore		.gitignore
README.md		README.md

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#	Title	Solution	Difficulty
292	Nim Game	C++	Easy
290	Word Pattern	C++	Easy
287	Find the Duplicate Number	C++	Hard
285	Inorder Successor in BST ♥	Java	Medium
283	Move Zeroes	C++	Easy
279	Perfect Squares	C++	Medium
278	First Bad Version	C++, Java	Easy
274	H-Index	C++	Medium
273	Integer to English Words	C++	Medium
268	Missing Number	C++	Medium
264	Ugly Number II	C++	Medium
263	Ugly Number	C++	Easy
258	Add Digits	C++	Easy
242	Valid Anagram	C++	Easy
241	Different Ways to Add Parentheses	C++	Medium
240	Search a 2D Matrix II	C++	Medium
239	Sliding Window Maximum	C++	Hard
238	Product of Array Except Self	C++	Medium
237	Delete Node in a Linked List	C++	Easy
236	Lowest Common Ancestor of a Binary Tree	C++, Java	Medium
235	Lowest Common Ancestor of a Binary Search Tree	C++	Easy
234	Palindrome Linked List	C++	Easy
233	Number of Digit One	C++	Medium
232	Implement Queue using Stacks	C++	Easy
231	Power of Two	C++	Easy
230	Kth Smallest Element in a BST	C++	Medium
229	Majority Element II	C++	Medium
228	Summary Ranges	C++	Easy
227	Basic Calculator II	C++	Medium
226	Invert Binary Tree	C++	Easy
225	Implement Stack using Queues	C++	Medium
224	Basic Calculator	C++	Medium
223	Rectangle Area	C++	Easy
222	Count Complete Tree Nodes	C++	Medium
221	Maximal Square	C++	Medium
220	Contains Duplicate III	C++	Medium
219	Contains Duplicate II	C++	Easy
218	The Skyline Problem	C++	Hard
217	Contains Duplicate	C++	Easy
216	Combination Sum III	C++	Medium
215	Kth Largest Element in an Array	C++	Medium
214	Shortest Palindrome	C++	Hard
213	House Robber II	C++	Medium
212	Word Search II	C++	Hard
211	Add and Search Word - Data structure design	C++	Medium
210	Course Schedule II	C++	Medium
209	Minimum Size Subarray Sum	C++	Medium
208	Implement Trie (Prefix Tree)	C++	Medium
207	Course Schedule	C++	Medium
206	Reverse Linked List	C++	Easy
205	Isomorphic Strings	C++	Easy
204	Count Primes	C++	Easy
203	Remove Linked List Elements	C++	Easy
202	Happy Number	C++	Easy
201	Bitwise AND of Numbers Range	C++	Medium
200	Number of Islands	C++	Medium
199	Binary Tree Right Side View	C++	Medium
198	House Robber	C++	Easy
191	Number of 1 Bits	C++	Easy
190	Reverse Bits	C++	Easy
189	Rotate Array	C++	Easy
188	Best Time to Buy and Sell Stock IV	C++	Hard
187	Repeated DNA Sequences	C++	Medium
186	Reverse Words in a String II ♥	C++	Medium
179	Largest Number	C++	Medium
174	Dungeon Game	C++	Hard
173	Binary Search Tree Iterator	C++, Java	Medium
172	Factorial Trailing Zeroes	C++	Easy
171	Excel Sheet Column Number	C++	Easy
170	Two Sum III - Data structure design ♥	C++	Easy
169	Majority Element	C++	Easy
168	Excel Sheet Column Title	C++	Easy
167	Two Sum II - Input array is sorted ♥	C++	Medium
166	Fraction to Recurring Decimal	C++	Medium
165	Compare Version Numbers	C++	Easy
164	Maximum Gap	C++	Hard
163	Missing Ranges ♥	C++	Medium
162	Find Peak Element	C++, Java	Medium
161	One Edit Distance♥	C++	Medium
160	Intersection of Two Linked Lists	C++	Easy
159	Longest Substring with At Most Two Distinct Characters ♥	C++	Hard
158	Read N Characters Given Read4 II - Call multiple times ♥	C++	Hard
157	Read N Characters Given Read4 ♥	C++	Easy
156	Binary Tree Upside Down ♥	C++	Medium
155	Min Stack	C++	Easy
154	Find Minimum in Rotated Sorted Array II	C++	Hard
153	Find Minimum in Rotated Sorted Array	C++, Java	Medium
152	Maximum Product Subarray	C++	Medium
151	Reverse Words in a String	C++	Medium
150	Evaluate Reverse Polish Notation	C++	Medium
149	Max Points on a Line	C++	Hard
148	Sort List	C++	Medium
147	Insertion Sort List	C++	Medium
146	LRU Cache	C++	Hard
145	Binary Tree Postorder Traversal	C++	Hard
144	Binary Tree Preorder Traversal	C++, Java	Medium
143	Reorder List	C++	Medium
142	Linked List Cycle II	C++	Medium
141	Linked List Cycle	C++	Medium
140	Word Break II	C++	Hard
139	Word Break	C++	Medium
138	Copy List with Random Pointer	C++	Hard
137	Single Number II	C++	Medium
136	Single Number	C++	Medium
135	Candy	C++	Hard
134	Gas Station	C++	Medium
133	Clone Graph	C++	Medium
132	Palindrome Partitioning II	C++	Hard
131	Palindrome Partitioning	C++	Medium
130	Surrounded Regions	C++	Medium
129	Sum Root to Leaf Numbers	C++	Medium
128	Longest Consecutive Sequence	C++	Hard
127	Word Ladder	C++	Medium
126	Word Ladder II	C++	Hard
125	Valid Palindrome	C++	Easy
124	Binary Tree Maximum Path Sum	C++, Java	Hard
123	Best Time to Buy and Sell Stock III	C++	Hard
122	Best Time to Buy and Sell Stock II	C++	Medium
121	Best Time to Buy and Sell Stock	C++	Medium
120	Triangle	C++, Java	Medium
119	Pascal's Triangle II	C++	Easy
118	Pascal's Triangle	C++	Easy
117	Populating Next Right Pointers in Each Node II	C++	Hard
116	Populating Next Right Pointers in Each Node	C++	Medium
115	Distinct Subsequences	C++	Hard
114	Flatten Binary Tree to Linked List	C++	Medium
113	Path Sum II	C++	Medium
112	Path Sum	C++	Easy
111	Minimum Depth of Binary Tree	C++	Easy
110	Balanced Binary Tree	C++, Java	Easy
109	Convert Sorted List to Binary Search Tree	C++	Medium
108	Convert Sorted Array to Binary Search Tree	C++	Medium
107	Binary Tree Level Order Traversal II	C++	Easy
106	Construct Binary Tree from Inorder and Postorder Traversal	C++	Medium
105	Construct Binary Tree from Preorder and Inorder Traversal	C++	Medium
104	Maximum Depth of Binary Tree	C++, Java	Easy
103	Binary Tree Zigzag Level Order Traversal	C++	Medium
102	Binary Tree Level Order Traversal	C++, Java	Easy
101	Symmetric Tree	C++	Easy
100	Same Tree	C++	Easy
99	Recover Binary Search Tree	C++	Hard
98	Validate Binary Search Tree	C++, Java	Medium
97	Interleaving String	C++	Hard
96	Unique Binary Search Trees	C++	Medium
95	Unique Binary Search Trees II	C++	Medium
94	Binary Tree Inorder Traversal	C++	Medium
93	Restore IP Addresses	C++	Medium
92	Reverse Linked List II	C++	Medium
91	Decode Ways	C++	Medium
90	Subsets II	C++, Java	Medium
89	Gray Code	C++	Medium
88	Merge Sorted Array	C++	Easy
87	Scramble String	C++	Hard
86	Partition List	C++	Medium
85	Maximal Rectangle	C++	Hard
84	Largest Rectangle in Histogram	C++	Hard
83	Remove Duplicates from Sorted List	C++	Easy
82	Remove Duplicates from Sorted List II	C++	Medium
81	Search in Rotated Sorted Array II	C++	Medium
80	Remove Duplicates from Sorted Array II	C++	Medium
79	Word Search	C++	Medium
78	Subsets	C++, Java	Medium
77	Combinations	C++	Medium
76	Minimum Window Substring	C++	Hard
75	Sort Colors	C++	Medium
74	Search a 2D Matrix	C++, Java	Medium
73	Set Matrix Zeroes	C++	Medium
72	Edit Distance	C++	Hard
71	Simplify Path	C++	Medium
70	Climbing Stairs	C++, Java	Easy
69	Sqrt(x)	C++	Medium
68	Text Justification	C++	Hard
67	Add Binary	C++	Easy
66	Plus One	C++	Easy
65	Valid Number	C++	Easy
64	Minimum Path Sum	C++, Java	Medium
63	Unique Paths II	C++, Java	Medium
62	Unique Paths	C++, Java	Medium
61	Rotate List	C++	Medium
60	Permutation Sequence	C++	Medium
59	Spiral Matrix II	C++	Medium
58	Length of Last Word	C++	Easy
57	Insert Interval	C++	Hard
56	Merge Intervals	C++	Hard
55	Jump Game	C++	Medium
54	Spiral Matrix	C++	Medium
53	Maximum Subarray	C++	Medium
52	N-Queens II	C++	Hard
51	N-Queens	C++	Hard
50	"Pow(x, n)"	C++	Medium
49	Group Anagrams	C++	Medium
48	Rotate Image	C++	Medium
47	Permutations II	C++	Hard
46	Permutations	C++	Medium
45	Jump Game II	C++	Hard
44	Wildcard Matching	C++	Hard
43	Multiply Strings	C++	Medium
42	Trapping Rain Water	C++	Hard
41	First Missing Positive	C++	Hard
40	Combination Sum II	C++	Medium
39	Combination Sum	C++	Medium
38	Count and Say	C++	Easy
37	Sudoku Solver	C++	Hard
36	Valid Sudoku	C++	Easy
35	Search Insert Position	C++, Java	Medium
34	Search for a Range	C++, Java	Medium
33	Search in Rotated Sorted Array	C++, Java	Hard
32	Longest Valid Parentheses	C++	Hard
31	Next Permutation	C++	Medium
30	Substring with Concatenation of All Words	C++	Hard
29	Divide Two Integers	C++	Medium
28	Implement strStr()	C++, Java	Easy
27	Remove Element	C++	Easy
26	Remove Duplicates from Sorted Array	C++	Easy
25	Reverse Nodes in k-Group	C++	Hard
24	Swap Nodes in Pairs	C++	Medium
23	Merge k Sorted Lists	C++	Hard
22	Generate Parentheses	C++	Medium
21	Merge Two Sorted Lists	C++	Easy
20	Valid Parentheses	C++	Easy
19	Remove Nth Node From End of List	C++	Easy
18	4Sum	C++	Medium
17	Letter Combinations of a Phone Number	C++	Medium
16	3Sum Closest	C++	Medium
15	3Sum	C++	Medium
14	Longest Common Prefix	C++	Easy
13	Roman to Integer	C++	Easy
12	Integer to Roman	C++	Medium
11	Container With Most Water	C++	Medium
10	Regular Expression Matching	C++	Hard
9	Palindrome Number	C++	Easy
8	String to Integer (atoi)	C++	Easy
7	Reverse Integer	C++	Easy
6	ZigZag Conversion	C++	Easy
5	Longest Palindromic Substring	C++	Medium
4	Median of Two Sorted Arrays	C++	Hard
3	Longest Substring Without Repeating Characters	C++	Medium
2	Add Two Numbers	C++	Medium
1	Two Sum	C++	Medium

#	Title	Solution	Difficulty
4	Tenth Line	Bash	Easy
3	Transpose File	Bash	Medium
2	Valid Phone Numbers	Bash	Easy
1	Word Frequency	Bash	Medium

#	Title	Solution	Difficulty
1	Search in a big sorted array	Java	Medium
2	Search Range in Binary Search Tree	Java	Medium

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