# LeetCode練習筆記 LeetCode --- - 1. [Two Sum](/@Hao2000/leetcode1) - 2. [Add Two Numbers](/@Hao2000/leetcode2) - 3. [Longest Substring Without Repeating Characters](/@Hao2000/leetcode3) - 5. [Longest Palindromic Substring](/@Hao2000/leetcode5) - 429. [N-ary Tree Level Order Traversal](/@Hao2000/leetcode429) ###### tags: `leetcode` `Java` `algorithm` `lintcode`