最近開始刷 LeetCode，但雖然有些題目解了出來，但還是存在很多似懂非懂的模糊空間，因此想透過記錄的方式記下這些經驗與領略，並用自己的方式表達出來，以釐清這些模糊的空間。
是說才剛開始刷題，長路漫漫阿…
| NO. | 題目 | 難度 | 備註 |
|---|---|---|---|
| 0771. | Jewels and Stones | E | |
| 0226. | Invert Binary Tree | E | |
| 0208. | Implement Trie (Prefix Tree) | M | |
| 0189. | Rotate Array | E | |
| 0175. | Combine Two Tables | E | |
| 0140. | Word Break II | H | |
| 0139. | Word Break | M | |
| 0071. | Simplify Path | M | |
| 0066. | Plus One | E | |
| 0065. | Valid Number | H | |
| 0044. | Wildcard Matching* | M | |
| 0043. | Multiply Strings | M | |
| 0036. | Valid Sudoku | M | |
| 0035. | Search Insert Position | E | |
| 0034. | Find First and Last Position of Element in Sorted Array | M | |
| 0033. | Search in Rotated Sorted Array | M | |
| 0032. | Longest Valid Parentheses* | H | |
| 0031. | Next Permutation | M | |
| 0030. | Substring with Concatenation of All Words | H | |
| 0029. | Divide Two Integers | M | |
| 0028. | Implement strStr() | E | |
| 0027. | Remove Element | E | |
| 0026. | Remove Duplicates from Sorted Array | E | |
| 0025. | Reverse Nodes in k-Group | H | |
| 0024. | Swap Nodes in Pairs | M | |
| 0023. | Merge k Sorted Lists | H | |
| 0022. | Generate Parentheses | M | |
| 0021. | Merge Two Sorted Lists | E | |
| 0020. | Valid Parentheses | E | |
| 0019. | Remove Nth Node From End of List | M | |
| 0018. | 4Sum* | M | |
| 0017. | Letter Combinations of a Phone Number | M | |
| 0016. | 3Sum Closest | M | |
| 0015. | 3Sum | M | |
| 0014. | Longest Common Prefix | E | |
| 0013. | Roman to Integer | E | |
| 0012. | Integer to Roman | M | |
| 0011. | Container With Most Water | M | |
| 0010. | Regular Expression Matching | H | |
| 0009. | Palindrome Number | E | |
| 0008. | String to Integer (atoi) | M | |
| 0007. | Reverse Integer | E | |
| 0006. | ZigZag Conversion | M | |
| 0005. | Longest Palindromic Substring | M | |
| 0003. | Longest Substring Without Repeating Characters | M | |
| 0002. | Add Two Numbers | M | |
| 0001. | Two Sum | E |