1650. Lowest Common Ancestor of a Binary Tree III
1650. Lowest Common Ancestor of a Binary Tree III
Check
LeetCode
1644. Lowest Common Ancestor of a Binary Tree II
1644. Lowest Common Ancestor of a Binary Tree II
Check
236. Lowest Common Ancestor of a Binary Tree
236. Lowest Common Ancestor of a Binary Tree
Check 235.
235. Lowest Common Ancestor of a Binary Search Tree
* 235. Lowest Common Ancestor of a Binary Search Tree
* 236.
18. 4 Sum
18. 4 Sum
Check 15. 3 Sum
5. Longest Palindromic Substring
5. Longest Palindromic Substring
這一題是我們要找出子字串中的最長的回文，其實最好從暴力解法開始學習起，前面的題目已經重複提過了好多次的回文的性質，這裡就用暴力法先來思考以下。
暴力法 (TLE)
887. Super Egg Drop
887. Super Egg Drop
參考 1884. Egg Drop With 2
732. My Calendar III
732. My Calendar III
題目在考 253. Meeting Rooms II 。
class
490. The Maze
490. The Maze
這一個題目可以使用廣度優先搜索來解，這一個題目的困難是在於要如何理解球的運動方向。
一般而言廣度優先搜索的探索步伐是一部，可是這個題目裡面，球會滾到撞牆為止，所以當我在座標 (row,
937. Reorder Data in Log Files
937. Reorder Data in Log Files
自定義排序
1. 如果第一個字是文字，有比較高的優先級，