LeetCode

This project uses the Swift language to solve questions on LeetCode-cn and records the solution and the answer.

Prerequisites

This project uses Xcode Playground to organize code files.

• Compiled with Xcode 10 and above.
• Swift 5.0 and above.

Directory

This section will list the questions that have been solved in this project.

Array

#	Title	Difficulty
914	X of a Kind in a Deck of Cards
941	Valid Mountain Array
999	Available Captures forRook
1365	How Many Numbers Are Smaller
289	Game of Life
912	Sort an Array
5381	Queries on a Permutation With Key
mst-01.07	Rotate Matrix LCCI
57	Insert Interval

Binary Search

#	Title	Difficulty
278	First Bad Version
34	Find First and Last Position of Element in Sorted Array

Breadth First Search

#	Title	Difficulty
127	Word Ladder
1162	As Far from Land as Possible

Dynamic Programming

#	Title	Difficulty
mst-17.16	The Masseuse LCCI

HashTable

#	Title	Difficulty
1207	Unique Number of Occurrences
463	Island Perimeter

Greedy

#	Title	Difficulty
55	Jump Game
134	Gas Station
1111	Maximum Nesting Depth of Two Valid Parentheses Strings
5195	Longest Happy String

Linked List

#	Title	Difficulty
876	Middle of the Linked List
2	Add Two Numbers

Math

#	Title	Difficulty
67	Add Binary
892	Surface Area of 3D Shapes

Stack

#	Title	Difficulty
232	Implement Queue using Stacks
mst-03.02	Min Stack LCCI
496	Validate Stack Sequences
42	Trapping Rain Water

String

#	Title	Difficulty
5380	String Matching in an Array
22	Generate Parentheses
151	Reverse Words in a String
5382	HTML Entity Parser

Tree

#	Title	Difficulty
104	Maximum Depth of Binary Tree
110	Balanced Binary Tree
226	Invert Binary Tree
94	Binary Tree Inorder Traversal
129	Sum Root to Leaf Numbers
144	Binary Tree Preorder Traversal
236	Lowest Common Ancestor of a Binary Tree
654	Maximum Binary Tree

Trie

#	Title	Difficulty
820	Short Encoding of Words

Two Pointers

#	Title	Difficulty
349	Intersection of Two Arrays