Leetcode Solutions

Update time: 2018-11-09 13:17:50

Auto created by leetcode_generate modified from bonfy/leetcode

242 / 883 problems solved!

139 problems locked.

#	Title	Source Code	Note	Difficulty
1	Two Sum	Java		Easy
2	Add Two Numbers	Java		Medium
3	Longest Substring Without Repeating Characters	Java		Medium
5	Longest Palindromic Substring	Java		Medium
7	Reverse Integer	Java		Easy
8	String to Integer (atoi)	Java		Medium
9	Palindrome Number	Java		Easy
11	Container With Most Water	Java		Medium
13	Roman to Integer	Java		Easy
14	Longest Common Prefix	Java		Easy
15	3Sum	Java		Medium
16	3Sum Closest	Java		Medium
17	Letter Combinations of a Phone Number	Java		Medium
18	4Sum	Java		Medium
19	Remove Nth Node From End of List	Java		Medium
20	Valid Parentheses	Java		Easy
21	Merge Two Sorted Lists	Java		Easy
22	Generate Parentheses	Java		Medium
24	Swap Nodes in Pairs	Java		Medium
26	Remove Duplicates from Sorted Array	Java		Easy
27	Remove Element	Java		Easy
28	Implement strStr()	Java		Easy
31	Next Permutation	Java		Medium
33	Search in Rotated Sorted Array	Java		Medium
34	Find First and Last Position of Element in Sorted Array	Java		Medium
35	Search Insert Position	Java		Easy
36	Valid Sudoku	Java		Medium
38	Count and Say	Java		Easy
39	Combination Sum	Java		Medium
40	Combination Sum II	Java		Medium
46	Permutations	Java		Medium
47	Permutations II	Java		Medium
48	Rotate Image	Java		Medium
49	Group Anagrams	Java		Medium
50	Pow(x, n)	Java		Medium
53	Maximum Subarray	Java		Easy
54	Spiral Matrix	Java		Medium
55	Jump Game	Java		Medium
56	Merge Intervals	Java		Medium
57	Insert Interval	Java		Hard
58	Length of Last Word	Java		Easy
59	Spiral Matrix II	Java		Medium
60	Permutation Sequence	Java		Medium
61	Rotate List	Java		Medium
62	Unique Paths	Java		Medium
63	Unique Paths II	Java		Medium
64	Minimum Path Sum	Java		Medium
66	Plus One	Java		Easy
67	Add Binary	Java		Easy
69	Sqrt(x)	Java		Easy
70	Climbing Stairs	Java		Easy
73	Set Matrix Zeroes	Java		Medium
74	Search a 2D Matrix	Java		Medium
75	Sort Colors	Java		Medium
77	Combinations	Java		Medium
78	Subsets	Java		Medium
79	Word Search	Java		Medium
80	Remove Duplicates from Sorted Array II	Java		Medium
81	Search in Rotated Sorted Array II	Java		Medium
82	Remove Duplicates from Sorted List II	Java		Medium
83	Remove Duplicates from Sorted List	Java		Easy
84	Largest Rectangle in Histogram	Java		Hard
86	Partition List	Java		Medium
88	Merge Sorted Array	Java		Easy
90	Subsets II	Java		Medium
92	Reverse Linked List II	Java		Medium
93	Restore IP Addresses	Java		Medium
94	Binary Tree Inorder Traversal	Java		Medium
95	Unique Binary Search Trees II	Java		Medium
96	Unique Binary Search Trees	Java		Medium
98	Validate Binary Search Tree	Java		Medium
100	Same Tree	Java		Easy
101	Symmetric Tree	Java		Easy
102	Binary Tree Level Order Traversal	Java		Medium
103	Binary Tree Zigzag Level Order Traversal	Java		Medium
104	Maximum Depth of Binary Tree	Java		Easy
105	Construct Binary Tree from Preorder and Inorder Traversal	Java		Medium
106	Construct Binary Tree from Inorder and Postorder Traversal	Java		Medium
107	Binary Tree Level Order Traversal II	Java		Easy
108	Convert Sorted Array to Binary Search Tree	Java		Easy
109	Convert Sorted List to Binary Search Tree	Java		Medium
110	Balanced Binary Tree	Java		Easy
111	Minimum Depth of Binary Tree	Java		Easy
112	Path Sum	Java		Easy
113	Path Sum II	Java		Medium
114	Flatten Binary Tree to Linked List	Java		Medium
116	Populating Next Right Pointers in Each Node	Java		Medium
118	Pascal's Triangle	Java		Easy
119	Pascal's Triangle II	Java		Easy
120	Triangle	Java		Medium
121	Best Time to Buy and Sell Stock	Java		Easy
122	Best Time to Buy and Sell Stock II	Java		Easy
125	Valid Palindrome	Java		Easy
130	Surrounded Regions	Java		Medium
131	Palindrome Partitioning	Java		Medium
134	Gas Station	Java		Medium
136	Single Number	Java		Easy
138	Copy List with Random Pointer	Java		Medium
139	Word Break	Java		Medium
141	Linked List Cycle	Java		Easy
142	Linked List Cycle II	Java		Medium
144	Binary Tree Preorder Traversal	Java		Medium
147	Insertion Sort List	Java		Medium
148	Sort List	Java		Medium
150	Evaluate Reverse Polish Notation	Java		Medium
152	Maximum Product Subarray	Java		Medium
153	Find Minimum in Rotated Sorted Array	Java		Medium
155	Min Stack	Java		Easy
160	Intersection of Two Linked Lists	Java		Easy
162	Find Peak Element	Java		Medium
167	Two Sum II - Input array is sorted	Java		Easy
169	Majority Element	Java		Easy
171	Excel Sheet Column Number	Java		Easy
172	Factorial Trailing Zeroes	Java		Easy
187	Repeated DNA Sequences	Java		Medium
189	Rotate Array	Java		Easy
190	Reverse Bits	Java		Easy
191	Number of 1 Bits	Java		Easy
198	House Robber	Java		Easy
199	Binary Tree Right Side View	Java		Medium
200	Number of Islands	Java		Medium
202	Happy Number	Java		Easy
204	Count Primes	Java		Easy
205	Isomorphic Strings	Java		Easy
206	Reverse Linked List	Java		Easy
207	Course Schedule	Java		Medium
209	Minimum Size Subarray Sum	Java		Medium
213	House Robber II	Java		Medium
215	Kth Largest Element in an Array	Java		Medium
216	Combination Sum III	Java		Medium
217	Contains Duplicate	Java		Easy
219	Contains Duplicate II	Java		Easy
220	Contains Duplicate III	Java		Medium
221	Maximal Square	Java		Medium
226	Invert Binary Tree	Java		Easy
230	Kth Smallest Element in a BST	Java		Medium
234	Palindrome Linked List	Java		Easy
235	Lowest Common Ancestor of a Binary Search Tree	Java		Easy
236	Lowest Common Ancestor of a Binary Tree	Java		Medium
237	Delete Node in a Linked List	Java		Easy
238	Product of Array Except Self	Java		Medium
240	Search a 2D Matrix II	Java		Medium
242	Valid Anagram	Java		Easy
257	Binary Tree Paths	Java		Easy
258	Add Digits	Java		Easy
263	Ugly Number	Java		Easy
264	Ugly Number II	Java		Medium
268	Missing Number	Java		Easy
274	H-Index	Java		Medium
275	H-Index II	Java		Medium
279	Perfect Squares	Java		Medium
283	Move Zeroes	Java		Easy
287	Find the Duplicate Number	Java		Medium
290	Word Pattern	Java		Easy
299	Bulls and Cows	Java		Medium
300	Longest Increasing Subsequence	Java		Medium
303	Range Sum Query - Immutable	Java		Easy
304	Range Sum Query 2D - Immutable	Java		Medium
309	Best Time to Buy and Sell Stock with Cooldown	Java		Medium
322	Coin Change	Java		Medium
324	Wiggle Sort II	Java		Medium
326	Power of Three	Java		Easy
328	Odd Even Linked List	Java		Medium
334	Increasing Triplet Subsequence	Java		Medium
337	House Robber III	Java		Medium
338	Counting Bits	Java		Medium
341	Flatten Nested List Iterator	Java		Medium
344	Reverse String	Java		Easy
345	Reverse Vowels of a String	Java		Easy
347	Top K Frequent Elements	Java		Medium
349	Intersection of Two Arrays	Java		Easy
350	Intersection of Two Arrays II	Java		Easy
371	Sum of Two Integers	Java		Easy
378	Kth Smallest Element in a Sorted Matrix	Java		Medium
380	Insert Delete GetRandom O(1)	Java		Medium
383	Ransom Note	Java		Easy
387	First Unique Character in a String	Java		Easy
389	Find the Difference	Java		Easy
392	Is Subsequence	Java		Medium
394	Decode String	Java		Medium
404	Sum of Left Leaves	Java		Easy
406	Queue Reconstruction by Height	Java		Medium
409	Longest Palindrome	Java		Easy
412	Fizz Buzz	Java		Easy
414	Third Maximum Number	Java		Easy
416	Partition Equal Subset Sum	Java		Medium
434	Number of Segments in a String	Java		Easy
435	Non-overlapping Intervals	Java		Medium
437	Path Sum III	Java		Easy
448	Find All Numbers Disappeared in an Array	Java		Easy
452	Minimum Number of Arrows to Burst Balloons	Java		Medium
455	Assign Cookies	Java		Easy
459	Repeated Substring Pattern	Java		Easy
463	Island Perimeter	Java		Easy
485	Max Consecutive Ones	Java		Easy
494	Target Sum	Java		Medium
501	Find Mode in Binary Search Tree	Java		Easy
520	Detect Capital	Java		Easy
521	Longest Uncommon Subsequence I	Java		Easy
524	Longest Word in Dictionary through Deleting	Java		Medium
530	Minimum Absolute Difference in BST	Java		Easy
532	K-diff Pairs in an Array	Java		Easy
541	Reverse String II	Java		Easy
551	Student Attendance Record I	Java		Easy
557	Reverse Words in a String III	Java		Easy
560	Subarray Sum Equals K	Java		Medium
561	Array Partition I	Java		Easy
566	Reshape the Matrix	Java		Easy
581	Shortest Unsorted Continuous Subarray	Java		Easy
605	Can Place Flowers	Java		Easy
606	Construct String from Binary Tree	Java		Easy
621	Task Scheduler	Java		Medium
628	Maximum Product of Three Numbers	Java		Easy
643	Maximum Average Subarray I	Java		Easy
647	Palindromic Substrings	Java		Medium
657	Robot Return to Origin	Java		Easy
661	Image Smoother	Java		Easy
665	Non-decreasing Array	Java		Easy
674	Longest Continuous Increasing Subsequence	Java		Easy
680	Valid Palindrome II	Java		Easy
686	Repeated String Match	Java		Easy
687	Longest Univalue Path	Java		Easy
690	Employee Importance	Java		Easy
695	Max Area of Island	Java		Medium
698	Partition to K Equal Sum Subsets	Java		Medium
733	Flood Fill	Java		Easy
744	Network Delay Time	Java		Easy
747	Min Cost Climbing Stairs	Java		Easy
764	N-ary Tree Level Order Traversal	Java		Easy
774	Maximum Depth of N-ary Tree	Java		Easy
799	Minimum Distance Between BST Nodes	Java		Easy
874	Backspace String Compare	Java		Easy
879	Maximize Distance to Closest Person	Java		Easy
890	Lemonade Change	Java		Easy
898	Transpose Matrix	Java		Easy
904	Leaf-Similar Trees	Java		Easy
908	Middle of the Linked List	Java		Easy
920	Uncommon Words from Two Sentences	Java		Easy
924	Fair Candy Swap	Java		Easy
932	Monotonic Array	Java		Easy
941	Sort Array By Parity	Java		Easy
950	X of a Kind in a Deck of Cards	Java		Easy