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.	Find the Index of the First Occurrence in a String	M
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