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85 Commits
Binary Trees
Binary Trees
 
 
DP
DP
 
 
Divide and Conquer
Divide and Conquer
 
 
Graphs
Graphs
 
 
Kickstart
Kickstart
 
 
Linkedlists
Linkedlists
 
 
Sorting
Sorting
 
 
String_search
String_search
 
 
maths
maths
 
 
面试准备
面试准备
 
 
.DS_Store
.DS_Store
 
 
.gitattributes
.gitattributes
 
 
102. Binary Tree Level Order Traversal .py
102. Binary Tree Level Order Traversal .py
 
 
103.Binary Tree Zigzag Level Order Traversal.py
103.Binary Tree Zigzag Level Order Traversal.py
 
 
1046. Last Stone Weight .py
1046. Last Stone Weight .py
 
 
105. Construct Binary Tree from Preorder and Inorder Traversal.py
105. Construct Binary Tree from Preorder and Inorder Traversal.py
 
 
106. Construct Binary Tree from Inorder and Postorder Traversal .py
106. Construct Binary Tree from Inorder and Postorder Traversal .py
 
 
108. Convert Sorted Array to Binary Search Tree.py
108. Convert Sorted Array to Binary Search Tree.py
 
 
110. Balanced Binary Tree .py
110. Balanced Binary Tree .py
 
 
111. Minimum Depth of Binary Tree.py
111. Minimum Depth of Binary Tree.py
 
 
112. Path Sum.py
112. Path Sum.py
 
 
113. Path Sum II .py
113. Path Sum II .py
 
 
1146. Snapshot Array .py
1146. Snapshot Array .py
 
 
1189. Maximum Number of Balloons.py
1189. Maximum Number of Balloons.py
 
 
1196. How Many Apples Can You Put into the Basket .py
1196. How Many Apples Can You Put into the Basket .py
 
 
120.triangle.py
120.triangle.py
 
 
121. Best Time to Buy and Sell Stock .py
121. Best Time to Buy and Sell Stock .py
 
 
1214. Two Sum BSTs.py
1214. Two Sum BSTs.py
 
 
1219. Path with Maximum Gold .py
1219. Path with Maximum Gold .py
 
 
1338. Reduce Array Size to The Half.py
1338. Reduce Array Size to The Half.py
 
 
134. Gas Station .py
134. Gas Station .py
 
 
136. Single Number .py
136. Single Number .py
 
 
1382. Balance a Binary Search Tree .py
1382. Balance a Binary Search Tree .py
 
 
139. Word Break .py
139. Word Break .py
 
 
144. Binary Tree Preorder Traversal.py
144. Binary Tree Preorder Traversal.py
 
 
1469. Find All The Lonely Nodes.py
1469. Find All The Lonely Nodes.py
 
 
150.evaluatereversepolishnotation.py
150.evaluatereversepolishnotation.py
 
 
152. Maximum Product Subarray .py
152. Maximum Product Subarray .py
 
 
198. House Robber .py
198. House Robber .py
 
 
200. Number of Islands .py
200. Number of Islands .py
 
 
206. Reverse Linked List .py
206. Reverse Linked List .py
 
 
212. Word Search II .py
212. Word Search II .py
 
 
213. House Robber II.py
213. House Robber II.py
 
 
22- Generate Parenthesis.py
22- Generate Parenthesis.py
 
 
221. Maximal Square .py
221. Maximal Square .py
 
 
225. Implement Stack using Queues.py
225. Implement Stack using Queues.py
 
 
232. Implement Queue using Stacks.py
232. Implement Queue using Stacks.py
 
 
234. Palindrome Linked List.py
234. Palindrome Linked List.py
 
 
235. Lowest Common Ancestor of a Binary Search Tree .py
235. Lowest Common Ancestor of a Binary Search Tree .py
 
 
238. Product of Array Except Self.py
238. Product of Array Except Self.py
 
 
253. Meeting Rooms II .py
253. Meeting Rooms II .py
 
 
266. Palindrome Permutation .py
266. Palindrome Permutation .py
 
 
279. Perfect Squares .py
279. Perfect Squares .py
 
 
285. Inorder Successor in BST.py
285. Inorder Successor in BST.py
 
 
300. Longest Increasing Subsequence .py
300. Longest Increasing Subsequence .py
 
 
300. Longest Increasing Subsequence.py
300. Longest Increasing Subsequence.py
 
 
309. Best Time to Buy and Sell Stock with Cooldown .py
309. Best Time to Buy and Sell Stock with Cooldown .py
 
 
322. Coin Change .py
322. Coin Change .py
 
 
334. Increasing Triplet Subsequence .py
334. Increasing Triplet Subsequence .py
 
 
342. Integer Break.py
342. Integer Break.py
 
 
347.Top K frequent elements
347.Top K frequent elements
 
 
39. Combination Sum .py
39. Combination Sum .py
 
 
3sumclosest.py
3sumclosest.py
 
 
40. Combination Sum II .py
40. Combination Sum II .py
 
 
409. Longest Palindrome .py
409. Longest Palindrome .py
 
 
413 Arthimetic Slices.py and 446. Arithmetic Slices II - Subsequence .py
413 Arthimetic Slices.py and 446. Arithmetic Slices II - Subsequence .py
 
 
42. Trapping Rain Water .py
42. Trapping Rain Water .py
 
 
438. Find All Anagrams in a String .py
438. Find All Anagrams in a String .py
 
 
451. Sort Characters By Frequency.py
451. Sort Characters By Frequency.py
 
 
46. Permutations .py
46. Permutations .py
 
 
49. Group Anagrams .py
49. Group Anagrams .py
 
 
5. Longest Palindromic Substring .py
5. Longest Palindromic Substring .py
 
 
538. Convert BST to Greater Tree .py
538. Convert BST to Greater Tree .py
 
 
540. Single Element in a Sorted Array.py
540. Single Element in a Sorted Array.py
 
 
567. Permutation in String .py
567. Permutation in String .py
 
 
62. Unique Paths .py
62. Unique Paths .py
 
 
628. Maximum Product of Three Numbers .py
628. Maximum Product of Three Numbers .py
 
 
63. Unique Paths II .py
63. Unique Paths II .py
 
 
64. Minimum Path Sum.py
64. Minimum Path Sum.py
 
 
653. Two Sum IV - Input is a BST.py
653. Two Sum IV - Input is a BST.py
 
 
692. Top K Frequent Words .py
692. Top K Frequent Words .py
 
 
740. Delete and Earn .py
740. Delete and Earn .py
 
 
75. Sort Colors.py
75. Sort Colors.py
 
 
77. Combinations .py
77. Combinations .py
 
 
78. Subsets .py
78. Subsets .py
 
 
801. Minimum Swaps To Make Sequences Increasing .py
801. Minimum Swaps To Make Sequences Increasing .py
 
 
819. Most Common Word .py
819. Most Common Word .py
 
 
844. Backspace String Compare .py
844. Backspace String Compare .py
 
 
85. Maximal Rectangle .py
85. Maximal Rectangle .py
 
 
860. Lemonade Change .py
860. Lemonade Change .py
 
 
876. Middle of the Linked List .py
876. Middle of the Linked List .py
 
 
98. Validate Binary Search Tree .py
98. Validate Binary Search Tree .py
 
 
BST.py
BST.py
 
 
Binary Tree Inorder Traversal .py
Binary Tree Inorder Traversal .py
 
 
How Many Numbers Are Smaller Than the Current Number.py
How Many Numbers Are Smaller Than the Current Number.py
 
 
LC 199. Binary Tree Right Side View .py
LC 199. Binary Tree Right Side View .py
 
 
Longest Substring Without Repeating Characters.py
Longest Substring Without Repeating Characters.py
 
 
Meeting rooms2.py
Meeting rooms2.py
 
 
Morris.py
Morris.py
 
 
NQueens.py
NQueens.py
 
 

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Data-structure-and-Algo-Notes

My LC solutions and Algo & Data structure Notes - I am active on leetcode and I post explanations to questions in the discussion channel. You can view my profile here

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My LC solutions and Algo & Data structure Notes : see https://leetcode.com/lucylichenhui/

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