LeetCode 解題攻略——Kotlin

引言

這篇文章的輸出並非做者計劃好的，它來源於做者的一個習慣。這個習慣就是每週都會解決一道LeetCode的題目，從畢業至今一直保持着。最近忽然發現每週的一道題和一篇解題思路的文章已經累積到60+，因而水到渠成地決定寫下這篇彙總文章，既是對過去的總結，也但願能對他人有一些啓發。

彙總

已經完成的LeetCode題目按問題難度彙總到下方的表格，分爲Easy/Medium/Hard三部分，Title列點擊題目能夠跳轉到該題答案和解題思路。

Easy

#	Title
717	1-bit and 2-bit Characters
804	Unique Morse Code Words
929	Unique Email Addresses
653	Two Sum IV - Input is a BST
709	To Lower Case
404	Sum of Left Leaves
905	Sort Array By Parity
922	Sort Array By Parity II
700	Search in a Binary Search Tree
938	Range Sum of BST
883	Projection Area of 3D Shapes
762	Prime Number of Set Bits in Binary Representation
852	Peak Index in a Mountain Array
876	Middle of the Linked List
771	Jewels and Stones
897	Increasing Order Search Tree
832	Flipping an Image
744	Find Smallest Letter Greater Than Target
760	Find Anagram Mappings
448	Find All Numbers Disappeared in an Array
942	DI String Match
944	Delete Columns to Make Sorted
696	Count Binary Substrings
538	Convert BST to Greater Tree
606	Construct String from Binary Tree
961	N-Repeated Element in Size 2N Array
977	Squares of a Sorted Array
965	Univalued Binary Tree
509	Fibonacci Number
985	Sum of Even Numbers After Queries
933	Number of Recent Calls
821	Shortest Distance to a Character
872	Leaf-Similar Trees
908	Smallest Range I
1002	Find Common Characters
836	Rectangle Overlap
783	Minimum Distance Between BST Nodes
303	Range Sum Query - Immutable

Medium

#	Title
861	Score After Flipping Matrix
950	Reveal Cards In Increasing Order
763	Partition Labels
921	Minimum Add to Make Parentheses Valid
807	Max Increase to Keep City Skyline
701	Insert into a Binary Search Tree
515	Find Largest Value in Each Tree Row
890	Find and Replace Pattern
814	Binary Tree Pruning
797	All Paths From Source to Target
894	All Possible Full Binary Trees
399	Evaluate Division
328	Odd Even Linked List
16	3Sum Closest
147	Insertion Sort List
802	Find Eventual Safe States
59	Spiral Matrix II
162	Find Peak Element
56	Merge Intervals
831	Masking Personal Information
725	Split Linked List in Parts
855	Exam Room
791	Custom Sort String

Hard

#	Title
57	Insert Interval
446	Arithmetic Slices II - Subsequence
410	Split Array Largest Sum
51	N-Queens
928	Minimize Malware Spread II

總結

不積跬步，無以致千里；不積小流，無以成江海。做者畢業至今保持着每週一道LeetCode的習慣，不知不覺中已經完成了100+的題目。經過梳理題目，總結解題思路，解題的效率也愈來愈高，效果仍是很明顯的。很推薦你們經過作LeetCode題目的方式保持思惟的活躍，從枯燥的業務中適當釋放一下，既能提升邏輯思惟能力，也能提升對算法和數據結構的理解。