LeetCode 解题攻略——Kotlin

引言

这篇文章的输出并非做者计划好的，它来源于做者的一个习惯。这个习惯就是每周都会解决一道LeetCode的题目，从毕业至今一直保持着。最近忽然发现每周的一道题和一篇解题思路的文章已经累积到60+，因而水到渠成地决定写下这篇汇总文章，既是对过去的总结，也但愿能对他人有一些启发。

汇总

已经完成的LeetCode题目按问题难度汇总到下方的表格，分为Easy/Medium/Hard三部分，Title列点击题目能够跳转到该题答案和解题思路。

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

总结

不积跬步，无以致千里；不积小流，无以成江海。做者毕业至今保持着每周一道LeetCode的习惯，不知不觉中已经完成了100+的题目。经过梳理题目，总结解题思路，解题的效率也愈来愈高，效果仍是很明显的。很推荐你们经过作LeetCode题目的方式保持思惟的活跃，从枯燥的业务中适当释放一下，既能提升逻辑思惟能力，也能提升对算法和数据结构的理解。