LeetCode Work

Record my codes for resolving problems in leetcode.

C++ code available

C++ code library

Python code available

Python code library

Problem List

ps: Bold font of the problems name means they are emphasis.

• Backtracking

  • 46. Permutations
  • 17. Letter Combinations of a Phone Number
  • 90. Subsets II

• HashTable

  • 454. 4Sum II (Python3)

• List

  • 92. Reverse Linked List II
  • 21. Merge Two Sorted Lists
  • 148. NEED DO
  • 146. NEED DO

• Tree

  • 100. Same Tree
  • 101. Symmetric Tree
  • 145. Binary Tree Postorder Traversal
  • 105. Construct Binary Tree from Preorder and Inorder Traversal
  • 106. Construct Binary Tree from Inorder and Postorder Traversal
  • 102. Binary Tree Level Order Traversal
  • 653. Two Sum IV - Input is a BST
  • 236. Lowest Common Ancestor of a Binary Tree
  • 543. Diameter of Binary Tree
  • 124. Binary Tree Maximum Path Sum(Method Simiar to above)
  • 87. NEED DO
  • 117. NEED DO
  • 99. NEED DO
  • 337. NEED DO

• Array

  • 34. Find First and Last Position of Element in Sorted Array (Python3)
  • 42. Trapping Rain Water

• Dynamic Programming

  • 300. Longest Increasing Subsequence
  • 72. NEED DO
  • 121. Best Time to Buy and Sell Stock
  • 198. House Robber
  • 312. NEED DO
  • 96. NEED DO
  • 140. NEED DO
  • 10. NEED DO
  • 338. Counting Bits

• String

  • 14. Longest Common Prefix(Python3)
  • 5. Longest Palindromic Substring(Python3)