LeetCode Problems' Solutions

Algorithms

#	Title	Solution	Difficulty
1	Two Sum	Java	Medium
15	Three Sum	Java	Medium
27	Remove Element	Java	Easy
79	Word Search	Java	Medium
189	Rotate Array	Java	Easy
229	Majority Element II	Java	Medium
238	Product of Array Except Self	Java	Medium
268	Missing Number	Java	Medium
283	Move Zeros	Java	Easy
287	Find the Duplicate Number	Java	Hard

#	Title	Solution	Difficulty
211	Add and Search Word - Data structure design	Java	Medium

#	Title	Solution	Difficulty
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, Java	Medium
99	Recover Binary Search Tree	Java	Hard
100	Same Tree	Java	Easy
101	Symmetric Tree	Java	Easy
102	Binary Tree Level Order Traversal	Java	Easy
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	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, Java	Medium
117	Populating Next Right Pointers in Each Node II	Java	Hard
124	Binary Tree Maximum Path Sum	Java	Hard
129	Sum Root to Leaf Numbers	Java	Medium
144	Binary Tree Preorder Traversal	Java	Medium
145	Binary Tree Postorder Traversal	Java	Hard
173	Binary Search Tree Iterator	Java	Medium
199	Binary Tree Right Side View	Java	Medium
222	Count Complete Tree Nodes	Java	Medium
226	Invert Binary Tree	Java	Easy
230	Kth Smallest Element in a BST	Java	Medium
235	Lowest Common Ancestor of a Binary Search Tree	Java	Easy
236	Lowest Common Ancestor of a Binary Tree	Java	Medium
257	Binary Tree Paths	Java	Easy
297	Serialize and Deserialize Binary Tree	Java	Medium

Name		Name	Last commit message	Last commit date
Latest commit History 115 Commits
algorithms/java/src		algorithms/java/src
README.md		README.md