leetcode

LeetCode Solutions

#	Title	Solution	Difficulty
888	Fair Candy Swap	Java	Easy
886	Possible Bipartition	Java	Medium
230	Kth Smallest Element in a BST	Java	Medium
226	Invert Binary Tree	Java	Easy
223	Rectangle Area	Java	Medium
222	Count Complete Tree Nodes	Java	Medium
221	Maximal Square	Java	Medium
217	Contains Duplicate	Java	Easy
215	Kth Largest Element in an Array	Java	Medium
213	House Robber II	Java	Medium
211	Add and Search Word - Data structure design	Java	Medium
208	Implement Trie (Prefix Tree)	Java	Medium
206	Reverse Linked List	Java	Easy
205	Isomorphic Strings	Java	Easy
203	Remove Linked List Elements	Java	Easy
202	Happy Number	Java	Easy
201	Bitwise AND of Numbers Range	Java	Medium
199	Binary Tree Right Side View	Java	Medium
198	House Robber	Java	Medium
191	Number of 1 Bits	Java	Easy
190	Reverse Bits	Java	Easy
189	Rotate Array	Java	Easy
187	Repeated DNA Sequences	Java	Medium
176	Second Highest Salary	SQL	Easy
175	Combine Two Tables	SQL	Easy
173	Binary Search Tree Iterator	Java	Medium
172	Factorial Trailing Zeroes	Java	Easy
171	Excel Sheet Column Number	Java	Easy
169	Majority Element	Java	Easy
168	Excel Sheet Column Title	Java	Easy
167	Two Sum II - Input array is sorted	Java	Easy
165	Compare Version Numbers	Java	Medium
162	Find Peak Element	Java	Medium
160	Intersection of Two Linked Lists	Java	Easy
155	Min Stack	Java	Easy
154	Find Minimum in Rotated Sorted Array II	Java	Hard
153	Find Minimum in Rotated Sorted Array	Java	Medium
152	Maximum Product Subarray	Java	Medium
151	Reverse Words in a String	Java	Medium
150	Evaluate Reverse Polish Notation	Java	Medium
148	Sort List	Java	Medium
147	Insertion Sort List	Java	Medium
146	LRU Cache	Java	Hard
145	Binary Tree Postorder Traversal	Java	Hard
144	Binary Tree Preorder Traversal	Java	Medium
143	Reorder List	Java	Medium
142	Linked List Cycle II	Java	Medium
141	Linked List Cycle	Java	Easy
138	Copy List with Random Pointer	Java	Medium
137	Single Number II	Java	Medium
136	Single Number	Java	Easy
135	Candy	Java	Meidum
134	Gas Station	Java	Meidum
132	Palindrome Partitioning II	Java	Hard
131	Palindrome Partitioning	Java	Medium
129	Sum Root to Leaf Numbers	Java	Medium
127	Word Ladder	Java	Medium
125	Valid Palindrome	Java	Easy
124	Binary Tree Maximum Path Sum	Java	Hard
123	Best Time to Buy and Sell Stock III	Java	Hard
122	Best Time to Buy and Sell Stock II	Java	Easy
121	Best Time to Buy and Sell Stock	Java	Easy
120	Triangle	Java	Medium
119	Pascal's Triangle II	Java	Easy
118	Pascal's Triangle	Java	Easy
117	Populating Next Right Pointers in Each Node II	Java	Medium
116	Populating Next Right Pointers in Each Node	Java	Medium
114	Flatten Binary Tree to Linked List	Java	Medium
113	Path Sum II	Java	Medium
112	Path Sum	Java	Easy
111	Minimum Depth of Binary Tree	Java	Easy
110	Balanced Binary Tree	Java	Easy
109	Convert Sorted List to Binary Search Tree	Java	Medium
108	Convert Sorted Array to Binary Search Tree	Java	Easy
107	Binary Tree Level Order Traversal II	Java	Easy
106	Construct Binary Tree from Inorder and Postorder Traversal	Java	Medium
105	Construct Binary Tree from Preorder and Inorder Traversal	Java	Medium
104	Maximum Depth of Binary Tree	Java	Easy
103	Binary Tree Zigzag Level Order Traversal	Java	Medium
102	Binary Tree Level Order Traversal	Java	Medium
101	Symmetric Tree	Java	Easy
100	Same Tree	Java	Easy
99	Recover Binary Search Tree	Java	Hard
98	Validate Binary Search Tree	Java	Medium
97	Interleaving String	Java	Hard
96	Unique Binary Search Trees	Java	Medium
95	Unique Binary Search Trees II	Java	Medium
94	Binary Tree Inorder Traversal	Java	Medium
93	Restore IP Addresses	Java	Medium
92	Reverse Linked List II	Java	Medium
91	Decode Ways	Java	Medium
90	Subsets II	Java	Medium
89	Gray Code	Java	Medium
88	Merge Sorted Array	Java	Easy
87	Scramble String	Java	Hard
86	Partition List	Java	Medium
85	Maximal Rectangle	Java	Hard
84	Largest Rectangle in Histogram	Java	Hard
83	Remove Duplicates from Sorted List	Java	Easy
82	Remove Duplicates from Sorted List II	Java	Medium
81	Search in Rotated Sorted Array II	Java	Medium
80	Remove Duplicates from Sorted Array II	Java	Medium
79	Word Search	Java	Medium
78	Subsets	Java	Medium
77	Combinations	Java	Medium
76	Minimum Window Substring	Java	Hard
75	Sort Colors	Java	Medium
74	Search a 2D Matrix	Java	Medium
73	Set Matrix Zeroes	Java	Medium
72	Edit Distance	Java	Hard
71	Simplify Path	Java	Medium
70	Climbing Stairs	Java	Easy
69	Sqrt(x)	Java	Easy
68	Text Justification	Java	Hard
67	Add Binary	Java	Easy
66	Plus One	Java	Easy
65	Valid Number	Java	Hard
64	Minimum Path Sum	Java	Medium
63	Unique Paths II	Java	Medium
62	Unique Paths	Java	Medium
61	Rotate List	Java	Medium
60	Permutation Sequence	Java	Medium
59	Spiral Matrix II	Java	Medium
58	Length of Last Word	Java	Medium
57	Insert Interval	Java	Hard
56	Merge Intervals	Java	Medium
55	Jump Game	Java	Medium
54	Spiral Matrix	Java	Medium
53	Maximum Subarray	Java	Easy
52	N-Queens II	Java	Hard
51	N-Queens	Java	Hard
50	Pow(x, n)	Java	Medium
49	Group Anagrams	Java	Medium
48	Rotate Image	Java	Medium
47	Permutations II	Java	Medium
46	Permutations	Java	Medium
45	Jump Game II	Java	Hard
44	Wildcard Matching	Java	Hard
43	Multiply Strings	Java	Medium
42	Trapping Rain Water	Java	Hard
41	First Missing Positive	Java	Hard
40	Combination Sum II	Java	Medium
39	Combination Sum	Java	Medium
38	Count and Say	Java	Easy
37	Sudoku Solver	Java	Hard
36	Valid Sudoku	Java	Medium
35	Search Insert Position	Java	Easy
34	Search for a Range	Java	Medium
33	Search in Rotated Sorted Array	Java	Medium
32	Longest Valid Parentheses	Java	Hard
31	Next Permutation	Java	Medium
30	Substring with Concatenation of All Words	Java	Hard
29	Divide Two Integers	Java	Medium
28	Implement strStr()	Java	Easy
27	Remove Element	Java	Easy
26	Remove Duplicates from Sorted Array	Java	Easy
25	Reverse Nodes in k-Group	Java	Hard
24	Swap Nodes in Pairs	Java	Medium
23	Merge k Sorted Lists	Java	Hard
22	Generate Parentheses	Java	Medium
21	Merge Two Sorted Lists	Java	Easy
20	Valid Parentheses	Java	Easy
19	Remove Nth Node From End of List	Java	Medium
18	4Sum	Java	Medium
17	Letter Combinations of a Phone Number	Java	Medium
16	3Sum Closest	Java	Medium
15	3Sum	Java	Medium
14	Longest Common Prefix	Java	Easy
13	Roman to Integer	Java	Easy
12	Integer to Roman	Java	Medium
11	Container With Most Water	Java	Medium
10	Regular Expression Matching	Java	Hard
9	Palindrome Number	Java	Easy
8	String to Integer	Java	Medium
7	Reverse Integer	Java	Easy
6	ZigZag Conversion	Java	Medium
5	Longest Palindromic Substring	Java	Medium
4	Median of Two Sorted Arrays	Java	Hard
3	Longest Substring Without Repeating Characters	Java	Medium
2	Add Two Numbers	Java	Medium
1	Two Sum	Java	Medium