ZiyaoGeng / LeetCode_Java

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✏️ Leetcode Solutions with Java

Update time: 2018-6-21 12:48

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#	Title	Source Code	Difficulty	Time	Solved
1	Two Sum	Java	Easy	2017/11/22
15	3 Sum	Java	Medium	2017/11/23
16	3 Sum Closest	Java	Medium	2017/11/23
18	4 Sum	Java	Medium	2017/11/23
2	Add Tow Numbers	Java	Medium	2017/11/22
445	Add Tow NumbersⅡ	Java	Medium	2017/11/26
3	Longest Substring Without Repeating Characters	Java	Medium	2017/11/27
4	Median of Two Sorted Arrays	Java	Hard	2017/12/4
5	Longest Palindromic Substring	Java	Medium	2017/12/7
6	ZigZag Conversion	Java	Medium	2017/12/10
7	Reverse Integer	Java	Easy	2017/12/10
9	Palindrome Number	Java	Easy	2017/12/12
8	String to Integer (atoi)	Java	Medium	2017/12/11
10	Regular Expression Matching	Java	Hard	2017/12/18
11	Container With Most Water	Java	Medium	2017/12/19
12	Integer to Roman	Java	Medium	2017/12/19
13	Roman to Integer	Java	Easy	2017/12/19
14	Longest Common Prefix	Java	Easy	2017/12/19
17	Letter Combinations of a Phone Number	Java	Medium	2017/12/20
22	Generate Parentheses	Java	Medium	2017/12/23
19	Remove Nth Node From End of List	Java	Medium	2017/12/20
20	Valid Parentheses	Java	Easy	2017/12/21
21	Merge Two Sorted Lists	Java	Easy	2017/12/21
23	Merge k Sorted Lists	Java	Hard	2017/12/24
24	Swap Nodes in Pairs	Java	Medium	2017/12/24
25	Reverse Nodes in k-Group	Java	Hard	2017/12/25
26	Remove Duplicates from Sorted Array	Java	Easy	2017/12/25
27	Remove Element	Java	Easy	2017/12/25
28	Implement strStr()	Java	Easy	2017/12/26
29	Implement strStr()	Java	Medium	2017/12/27
30	Substring with Concatenation of All Words	Java	Hard	2017/12/30
31	Next Permutation	Java	Medium	2017/12/30
32	Longest Valid Parentheses	Java	Hard	2017/12/31
33	Search in Rotated Sorted Array	Java	Medium	2017/12/31
81	Search in Rotated Sorted Array II	Java	Medium	2018/1/1
34	Search for a Range	Java	Medium	2018/1/2
35	Search Insert Position	Java	Easy	2018/1/2
36	Valid Sudoku	Java	Medium	2018/1/3
38	Count and Say	Java	Easy	2018/1/4
39	Combination Sum	Java	Medium	2018/1/5
40	Combination Sum II	Java	Medium	2018/1/8
42	Trapping Rain Water	Java	Hard	2018/5/7	N
43	Multiply Strings	Java	Medium	2018/1/21
415	Add Strings	Java	Easy	2018/1/21
46	Permutations	Java	Medium	2018/2/6
47	Permutations II	Java	Medium	2018/2/7
48	Rotate Image	Java	Medium	2018/3/5
49	Group Anagrams	Java	Medium	2018/3/4
50	Pow(x, n)	Java	Easy	2018/1/6
51	N-Queens	Java	Hard	2018/5/5	Y
52	N-QueensII	Java	Hard	2018/5/6	Y
53	Maximum Subarray	Java	Easy	2017/11/19
54	Spiral Matrix	Java	Medium	2018/3/6	Y
59	Spiral Matrix II	Java	Medium	2018/3/11	N
55	Jump Game	Java	Medium	2018/3/8
56	Merge Intervals	Java	Medium	2018/3/7
58	Length of Last Word	Java	Easy	2017/11/19
60	Permutation Sequence	Java	Medium	2018/3/12	Y
61	Rotate List	Java	Medium	2018/3/14	Y
62	Unique Paths	Java	Medium	2018/3/10	N
63	Unique PathsII	Java	Medium	2018/3/10	N
64	Minimum Path Sum	Java	Medium	2018/3/13	Y
66	Plus One	Java	Easy	2017/11/19
67	Add Binary	Java	Easy	2017/11/19
69	Sqrt(x)	Java	Easy	2017/11/19
70	Climbing Stairs	Java	Easy	2017/11/20
73	Set Matrix Zeroes	Java	Medium	2018/4/19	Y
74	Search a 2D Matrix	Java	Medium	2018/4/21	Y
240	Search a 2D Matrix II	Java	Medium	2018/4/22	N
75	Sort Colors	Java	Medium	2018/4/29	N
77	Combinations	Java	Medium	2018/4/30	Y
78	Subsets	Java	Medium	2018/4/18	Y
90	Subsets II	Java	Medium	2018/4/21	Y
79	Word Search	Java	Medium	2018/3/17	N
80	Remove Duplicates from Sorted Array II	Java	Medium	2018/5/1	Y
82	Remove Duplicates from Sorted List II	Java	Medium	2018/4/3	N
83	Remove Duplicates from Sorted List	Java	Easy	2017/11/20
86	MPartition List	Java	Medium	2018/4/4	Y
88	Merge Sorted Array	Java	Easy	2017/11/21
89	Gray Code	Java	Medium	2018/4/27	N
92	Reverse Linked List II	Java	Meium	2018/4/9	N
93	Restore IP Addresses	Java	Meium	2018/4/17	Y
94	Binary Tree Inorder Traversal	Java	Meium	2018/3/16	Y
144	Binary Tree Preorder Traversal	Java	Meium	2018/3/16	Y
145	Binary Tree Postorder Traversal	Java	Hard	2018/3/16	Y
96	Unique Binary Search Trees	Java	Meium	2018/3/18	N
100	Same Tree	Java	Easy	2017/11/22
101	Symmetric Tree	Java	Easy	2018/3/26	Y
102	Binary Tree Level Order Traversal	Java	Medium	2018/3/28	Y
103	Binary Tree Zigzag Level Order Traversal	Java	Medium	2018/5/10	N
104	Maximum Depth of Binary Tree	Java	Easy	2018/3/27	Y
105	Construct Binary Tree from Preorder and Inorder Traversal	Java	Medium	2018/5/13	N
107	Binary Tree Level Order Traversal II	Java	Easy	2018/3/29	Y
110	Balanced Binary Tree	Java	Easy	2018/4/1	N
111	Minimum Depth of Binary Tree	Java	Easy	2018/4/2	N
112	Path Sum	Java	Easy	2018/3/30	N
113	Path Sum II	Java	Easy	2018/3/31	Y
114	Flatten Binary Tree to Linked List	Java	Medium	2018/5/15	N
116	Populating Next Right Pointers in Each Node	Java	Medium	2018/5/14	Y
117	Populating Next Right Pointers in Each NodeII	Java	Medium	2018/5/15	Y
118	Pascal's Triangle	Java	Easy	2018/4/24	Y
119	Pascal's Triangle II	Java	Easy	2018/4/25	Y
120	Triangle	Java	Medium	2018/5/8	N
121	Best Time to Buy and Sell Stock	Java	Easy	2018/4/28	Y
122	Best Time to Buy and Sell Stock II	Java	Easy	2018/5/2	N
125	Valid Palindrome	Java	Easy	2018/5/29	Y
129	Sum Root to Leaf Numbers	Java	Medium	2018/5/9	Y
136	Single Number	Java	Easy	2018/3/21	Y
137	Single NumberII	Java	Medium	2018/5/3	Y
260	Single NumberIII	Java	Medium	2018/5/5	Y
138	Copy List with Random Pointer	Java	Medium	2018/4/15	Y
139	Word Break	Java	Medium	2018/4/15	N
141	Linked List Cycle	Java	Easy	2018/3/24	Y
142	Linked List Cycle II	Java	Medium	2018/3/25	Y
143	Reorder List	Java	Medium	2018/4/12	Y
147	Insertion Sort List	Java	Medium	2018/4/13	Y
148	Sort List	Java	Medium	2018/4/14	Y
152	Maximum Product Subarray	Java	Medium	2018/6/21	N
153	Find Minimum in Rotated Sorted Array	Java	Medium	2018/5/23	Y
154	Find Minimum in Rotated Sorted ArrayII	Java	Hard	2018/5/23	Y
155	MinStack	Java	Medium	2018/5/24	Y
160	Intersection of Two Linked Lists	Java	Easy	2018/4/12	N
162	Find Peak Element	Java	Medium	2018/6/22	Y
167	Two Sum II - Input array is sorted	Java	Easy	2018/4/26	Y
168	Excel Sheet Column Title	Java	Easy	2018/6/23	Y
169	Majority Element	Java	Easy	2018/5/12	Y
171	Excel Sheet Column Number	Java	Easy	2018/5/25	Y
172	Factorial Trailing Zeroes	Java	Easy	2018/5/26	N
187	Repeated DNA Sequences	Java	Medium	2018/6/24	N
189	Rotate Array	Java	Easy	2018/4/23	Y
191	Number of 1 Bits	Java	Easy	2018/5/28	N
198	House Robber	Java	Easy	2018/5/27	N
199	Rotate Array	Java	Medium	2018/5/17	Y
200	Number of Islands	Java	Medium	2018/5/22	Y
201	Bitwise AND of Numbers Range	Java	Medium	2018/6/25	Y
202	Happy Number	Java	Easy	2018/5/20	Y
203	Remove Linked List Elements	Java	Easy	2018/4/10	Y
205	Isomorphic Strings	Java	Easy	2018/5/21	N
206	Reverse Linked List	Java	Easy	2018/4/10	Y
209	Minimum Size Subarray Sum	Java	Medium	2018/5/31	Y
215	Kth Largest Element in an Array	Java	Medium	2018/5/19	Y
216	Combination Sum III	Java	Medium	2018/5/18	Y
217	Contains Duplicate	Java	Easy	2018/6/1	Y
219	Contains Duplicate II	Java	Easy	2018/6/2	N
221	Maximal Square	Java	Medium	2018/6/14	N
222	Count Complete Tree Nodes	Java	Medium	2018/6/14	N
223	Rectangle Area	Java	Medium	2018/6/13	N
225	Implement Stack using Queues	Java	Easy	2018/6/3	Y
226	Invert Binary Tree	Java	Easy	2018/6/12	Y
231	Power of Two	Java	Easy	2018/6/4	Y
232	Implement Queue using Stacks	Java	Easy	2018/6/11	Y
234	Palindrome Linked List	Java	Easy	2018/4/11	Y
237	Delete Node in a Linked List	Java	Easy	2018/4/11	N
238	Product of Array Except Self	Java	Medium	2018/6/11	N
241	Different Ways to Add Parentheses	Java	Medium	2018/6/10	N
242	Valid Anagram	Java	Easy	2018/6/9	Y
257	Binary Tree Paths	Java	Easy	2018/6/8	Y
258	Add Digits	Java	Easy	2018/6/7	Y
263	Ugly Number	Java	Easy	2018/6/5	Y
264	Ugly Number II	Java	Medium	2018/6/6	N
268	Missing Number	Java	Easy	2018/6/15	Y
283	Move Zeroes	Java	Easy	2018/6/17	Y
292	Nim Game	Java	Easy	2018/6/15	Y
318	Maximum Product of Word Lengths	Java	Medium	2018/6/20	N
326	Power of Three	Java	Easy	2018/7/17	Y
328	Odd Even Linked List	Java	Medium	2018/4/15	Y
342	Power of Four	Java	Medium	2018/6/28	N
343	Integer Break	Java	Medium	2018/6/26	N
349	Intersection of Two Arrays	Java	Easy	2018/6/18	Y
350	Intersection of Two Arrays II	Java	Easy	2018/6/19	Y
725	Split Linked List in Parts	Java	Medium	2018/4/16	Y
817	Linked List Components	Java	Medium	2018/4/16	Y