Initial commit

.gitattributes

@@ -0,0 +1,2 @@
+# Auto detect text files and perform LF normalization
+* text=auto

.gitignore

@@ -0,0 +1,398 @@
+## Ignore Visual Studio temporary files, build results, and
+## files generated by popular Visual Studio add-ons.
+##
+## Get latest from https://github.com/github/gitignore/blob/main/VisualStudio.gitignore
+
+# User-specific files
+*.rsuser
+*.suo
+*.user
+*.userosscache
+*.sln.docstates
+
+# User-specific files (MonoDevelop/Xamarin Studio)
+*.userprefs
+
+# Mono auto generated files
+mono_crash.*
+
+# Build results
+[Dd]ebug/
+[Dd]ebugPublic/
+[Rr]elease/
+[Rr]eleases/
+x64/
+x86/
+[Ww][Ii][Nn]32/
+[Aa][Rr][Mm]/
+[Aa][Rr][Mm]64/
+bld/
+[Bb]in/
+[Oo]bj/
+[Ll]og/
+[Ll]ogs/
+
+# Visual Studio 2015/2017 cache/options directory
+.vs/
+# Uncomment if you have tasks that create the project's static files in wwwroot
+#wwwroot/
+
+# Visual Studio 2017 auto generated files
+Generated\ Files/
+
+# MSTest test Results
+[Tt]est[Rr]esult*/
+[Bb]uild[Ll]og.*
+
+# NUnit
+*.VisualState.xml
+TestResult.xml
+nunit-*.xml
+
+# Build Results of an ATL Project
+[Dd]ebugPS/
+[Rr]eleasePS/
+dlldata.c
+
+# Benchmark Results
+BenchmarkDotNet.Artifacts/
+
+# .NET Core
+project.lock.json
+project.fragment.lock.json
+artifacts/
+
+# ASP.NET Scaffolding
+ScaffoldingReadMe.txt
+
+# StyleCop
+StyleCopReport.xml
+
+# Files built by Visual Studio
+*_i.c
+*_p.c
+*_h.h
+*.ilk
+*.meta
+*.obj
+*.iobj
+*.pch
+*.pdb
+*.ipdb
+*.pgc
+*.pgd
+*.rsp
+*.sbr
+*.tlb
+*.tli
+*.tlh
+*.tmp
+*.tmp_proj
+*_wpftmp.csproj
+*.log
+*.tlog
+*.vspscc
+*.vssscc
+.builds
+*.pidb
+*.svclog
+*.scc
+
+# Chutzpah Test files
+_Chutzpah*
+
+# Visual C++ cache files
+ipch/
+*.aps
+*.ncb
+*.opendb
+*.opensdf
+*.sdf
+*.cachefile
+*.VC.db
+*.VC.VC.opendb
+
+# Visual Studio profiler
+*.psess
+*.vsp
+*.vspx
+*.sap
+
+# Visual Studio Trace Files
+*.e2e
+
+# TFS 2012 Local Workspace
+$tf/
+
+# Guidance Automation Toolkit
+*.gpState
+
+# ReSharper is a .NET coding add-in
+_ReSharper*/
+*.[Rr]e[Ss]harper
+*.DotSettings.user
+
+# TeamCity is a build add-in
+_TeamCity*
+
+# DotCover is a Code Coverage Tool
+*.dotCover
+
+# AxoCover is a Code Coverage Tool
+.axoCover/*
+!.axoCover/settings.json
+
+# Coverlet is a free, cross platform Code Coverage Tool
+coverage*.json
+coverage*.xml
+coverage*.info
+
+# Visual Studio code coverage results
+*.coverage
+*.coveragexml
+
+# NCrunch
+_NCrunch_*
+.*crunch*.local.xml
+nCrunchTemp_*
+
+# MightyMoose
+*.mm.*
+AutoTest.Net/
+
+# Web workbench (sass)
+.sass-cache/
+
+# Installshield output folder
+[Ee]xpress/
+
+# DocProject is a documentation generator add-in
+DocProject/buildhelp/
+DocProject/Help/*.HxT
+DocProject/Help/*.HxC
+DocProject/Help/*.hhc
+DocProject/Help/*.hhk
+DocProject/Help/*.hhp
+DocProject/Help/Html2
+DocProject/Help/html
+
+# Click-Once directory
+publish/
+
+# Publish Web Output
+*.[Pp]ublish.xml
+*.azurePubxml
+# Note: Comment the next line if you want to checkin your web deploy settings,
+# but database connection strings (with potential passwords) will be unencrypted
+*.pubxml
+*.publishproj
+
+# Microsoft Azure Web App publish settings. Comment the next line if you want to
+# checkin your Azure Web App publish settings, but sensitive information contained
+# in these scripts will be unencrypted
+PublishScripts/
+
+# NuGet Packages
+*.nupkg
+# NuGet Symbol Packages
+*.snupkg
+# The packages folder can be ignored because of Package Restore
+**/[Pp]ackages/*
+# except build/, which is used as an MSBuild target.
+!**/[Pp]ackages/build/
+# Uncomment if necessary however generally it will be regenerated when needed
+#!**/[Pp]ackages/repositories.config
+# NuGet v3's project.json files produces more ignorable files
+*.nuget.props
+*.nuget.targets
+
+# Microsoft Azure Build Output
+csx/
+*.build.csdef
+
+# Microsoft Azure Emulator
+ecf/
+rcf/
+
+# Windows Store app package directories and files
+AppPackages/
+BundleArtifacts/
+Package.StoreAssociation.xml
+_pkginfo.txt
+*.appx
+*.appxbundle
+*.appxupload
+
+# Visual Studio cache files
+# files ending in .cache can be ignored
+*.[Cc]ache
+# but keep track of directories ending in .cache
+!?*.[Cc]ache/
+
+# Others
+ClientBin/
+~$*
+*~
+*.dbmdl
+*.dbproj.schemaview
+*.jfm
+*.pfx
+*.publishsettings
+orleans.codegen.cs
+
+# Including strong name files can present a security risk
+# (https://github.com/github/gitignore/pull/2483#issue-259490424)
+#*.snk
+
+# Since there are multiple workflows, uncomment next line to ignore bower_components
+# (https://github.com/github/gitignore/pull/1529#issuecomment-104372622)
+#bower_components/
+
+# RIA/Silverlight projects
+Generated_Code/
+
+# Backup & report files from converting an old project file
+# to a newer Visual Studio version. Backup files are not needed,
+# because we have git ;-)
+_UpgradeReport_Files/
+Backup*/
+UpgradeLog*.XML
+UpgradeLog*.htm
+ServiceFabricBackup/
+*.rptproj.bak
+
+# SQL Server files
+*.mdf
+*.ldf
+*.ndf
+
+# Business Intelligence projects
+*.rdl.data
+*.bim.layout
+*.bim_*.settings
+*.rptproj.rsuser
+*- [Bb]ackup.rdl
+*- [Bb]ackup ([0-9]).rdl
+*- [Bb]ackup ([0-9][0-9]).rdl
+
+# Microsoft Fakes
+FakesAssemblies/
+
+# GhostDoc plugin setting file
+*.GhostDoc.xml
+
+# Node.js Tools for Visual Studio
+.ntvs_analysis.dat
+node_modules/
+
+# Visual Studio 6 build log
+*.plg
+
+# Visual Studio 6 workspace options file
+*.opt
+
+# Visual Studio 6 auto-generated workspace file (contains which files were open etc.)
+*.vbw
+
+# Visual Studio 6 auto-generated project file (contains which files were open etc.)
+*.vbp
+
+# Visual Studio 6 workspace and project file (working project files containing files to include in project)
+*.dsw
+*.dsp
+
+# Visual Studio 6 technical files 
+*.ncb
+*.aps
+
+# Visual Studio LightSwitch build output
+**/*.HTMLClient/GeneratedArtifacts
+**/*.DesktopClient/GeneratedArtifacts
+**/*.DesktopClient/ModelManifest.xml
+**/*.Server/GeneratedArtifacts
+**/*.Server/ModelManifest.xml
+_Pvt_Extensions
+
+# Paket dependency manager
+.paket/paket.exe
+paket-files/
+
+# FAKE - F# Make
+.fake/
+
+# CodeRush personal settings
+.cr/personal
+
+# Python Tools for Visual Studio (PTVS)
+__pycache__/
+*.pyc
+
+# Cake - Uncomment if you are using it
+# tools/**
+# !tools/packages.config
+
+# Tabs Studio
+*.tss
+
+# Telerik's JustMock configuration file
+*.jmconfig
+
+# BizTalk build output
+*.btp.cs
+*.btm.cs
+*.odx.cs
+*.xsd.cs
+
+# OpenCover UI analysis results
+OpenCover/
+
+# Azure Stream Analytics local run output
+ASALocalRun/
+
+# MSBuild Binary and Structured Log
+*.binlog
+
+# NVidia Nsight GPU debugger configuration file
+*.nvuser
+
+# MFractors (Xamarin productivity tool) working folder
+.mfractor/
+
+# Local History for Visual Studio
+.localhistory/
+
+# Visual Studio History (VSHistory) files
+.vshistory/
+
+# BeatPulse healthcheck temp database
+healthchecksdb
+
+# Backup folder for Package Reference Convert tool in Visual Studio 2017
+MigrationBackup/
+
+# Ionide (cross platform F# VS Code tools) working folder
+.ionide/
+
+# Fody - auto-generated XML schema
+FodyWeavers.xsd
+
+# VS Code files for those working on multiple tools
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+*.code-workspace
+
+# Local History for Visual Studio Code
+.history/
+
+# Windows Installer files from build outputs
+*.cab
+*.msi
+*.msix
+*.msm
+*.msp
+
+# JetBrains Rider
+*.sln.iml

1. Two Sum/1. Two Sum.csproj

@@ -0,0 +1,11 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <RootNamespace>_1._Two_Sum</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

1. Two Sum/Program.cs

@@ -0,0 +1,10 @@
+namespace _1._Two_Sum
+{
+    internal class Program
+    {
+        static void Main(string[] args)
+        {
+            Console.WriteLine("Hello, World!");
+        }
+    }
+}

1. Two Sum/Solution.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace _1._Two_Sum;
+
+public class Solution
+{
+    public int[]? TwoSum(int[] nums, int target)
+    {
+        for (int i = 0; i < nums.Length; i++)
+            for (int j = i+1; j < nums.Length; j++)
+                if (nums[i] + nums[j] == target)
+                    return new int[] { i, j };
+        return null;
+    }
+}

1480. Running Sum of 1d Array/1480. Running Sum of 1d Array.csproj

@@ -0,0 +1,11 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <RootNamespace>_1480._Running_Sum_of_1d_Array</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

1480. Running Sum of 1d Array/Program.cs

@@ -0,0 +1,10 @@
+namespace _1480._Running_Sum_of_1d_Array
+{
+    internal class Program
+    {
+        static void Main(string[] args)
+        {
+            Console.WriteLine("Hello, World!");
+        }
+    }
+}

1480. Running Sum of 1d Array/Solution.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace _1480._Running_Sum_of_1d_Array;
+
+public class Solution
+{
+    public int[] RunningSum(int[] nums)
+    {
+        int[] result = new int[nums.Length];
+        result[0] = nums[0];
+        for(int i = 1; i < nums.Length; i++)
+            result[i] = nums[i] + result[i-1];
+        return result;
+    }
+}

205. Isomorphic Strings/205. Isomorphic Strings.csproj

@@ -0,0 +1,11 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <RootNamespace>_205._Isomorphic_Strings</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

205. Isomorphic Strings/Program.cs

@@ -0,0 +1,10 @@
+namespace _205._Isomorphic_Strings
+{
+    internal class Program
+    {
+        static void Main(string[] args)
+        {
+            Console.WriteLine(new Solution().IsIsomorphic("egg","foo"));
+        }
+    }
+}

205. Isomorphic Strings/Solution.cs

@@ -0,0 +1,37 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace _205._Isomorphic_Strings;
+
+public class Solution
+{
+    public bool IsIsomorphic(string s, string t)
+    {
+        Dictionary<char, char> table = new Dictionary<char, char>();
+        Dictionary<char, char> antiTable = new Dictionary<char, char>();
+        for(int i = 0; i < s.Length; i++)
+        {
+            char source = s[i];
+            char to = t[i];
+            if (table.ContainsKey(source))
+            {
+                if(table[source] != to)
+                    return false;
+            }
+            else
+                table.Add(source, to);
+
+            if (antiTable.ContainsKey(to))
+            {
+                if (antiTable[to] != source)
+                    return false;
+            }
+            else
+                antiTable.Add(to, source);
+        }
+        return true;
+    }
+}

217. Contains Duplicate/217. Contains Duplicate.csproj

@@ -0,0 +1,11 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <RootNamespace>_217._Contains_Duplicate</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

217. Contains Duplicate/Program.cs

@@ -0,0 +1,10 @@
+namespace _217._Contains_Duplicate
+{
+    internal class Program
+    {
+        static void Main(string[] args)
+        {
+            Console.WriteLine("Hello, World!");
+        }
+    }
+}

217. Contains Duplicate/Solution.cs

@@ -0,0 +1,9 @@
+namespace _217._Contains_Duplicate;
+
+public class Solution
+{
+    public bool ContainsDuplicate(int[] nums)
+    {
+        return nums.ToHashSet().Count != nums.Length;
+    }
+}

350. Intersection of Two Arrays II/350. Intersection of Two Arrays II.csproj

@@ -0,0 +1,11 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <RootNamespace>_350._Intersection_of_Two_Arrays_II</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

350. Intersection of Two Arrays II/Program.cs

@@ -0,0 +1,10 @@
+namespace _350._Intersection_of_Two_Arrays_II
+{
+    internal class Program
+    {
+        static void Main(string[] args)
+        {
+            Console.WriteLine("Hello, World!");
+        }
+    }
+}

350. Intersection of Two Arrays II/Solution.cs

@@ -0,0 +1,9 @@
+namespace _350._Intersection_of_Two_Arrays_II;
+
+public class Solution
+{
+    public int[] Intersect(int[] nums1, int[] nums2)
+    {
+
+    }
+}

392. Is Subsequence/392. Is Subsequence.csproj

@@ -0,0 +1,11 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <RootNamespace>_392._Is_Subsequence</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

392. Is Subsequence/Program.cs

@@ -0,0 +1,10 @@
+namespace _392._Is_Subsequence
+{
+    internal class Program
+    {
+        static void Main(string[] args)
+        {
+            Console.WriteLine("Hello, World!");
+        }
+    }
+}

392. Is Subsequence/Solution.cs

@@ -0,0 +1,27 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace _392._Is_Subsequence;
+
+public class Solution
+{
+    public bool IsSubsequence(string s, string t)
+    {
+        if (s.Length == 0)
+            return true;
+        int sIndex = 0;
+        for(int i = 0; i < t.Length; i++)
+        {
+            if (t[i] == s[sIndex])
+            {
+                sIndex++;
+                if (sIndex >= s.Length)
+                    return true;
+            }
+        }
+        return false;
+    }
+}

53. Maximum Subarray/53. Maximum Subarray.csproj

@@ -0,0 +1,11 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <RootNamespace>_53._Maximum_Subarray</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

53. Maximum Subarray/Program.cs

@@ -0,0 +1,10 @@
+namespace _53._Maximum_Subarray
+{
+    internal class Program
+    {
+        static void Main(string[] args)
+        {
+            Console.WriteLine("Hello, World!");
+        }
+    }
+}

53. Maximum Subarray/Solution.cs

@@ -0,0 +1,16 @@
+namespace _53._Maximum_Subarray;
+
+public class Solution
+{
+    public int MaxSubArray(int[] nums)
+    {
+        int best_sum = int.MinValue;
+        int current_sum = 0;
+        foreach(var x in nums)
+        {
+            current_sum = Math.Max(x, current_sum + x);
+            best_sum = Math.Max(best_sum, current_sum);
+        }
+        return best_sum;
+    }
+}

724. Find Pivot Index/724. Find Pivot Index.csproj

@@ -0,0 +1,11 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <RootNamespace>_724._Find_Pivot_Index</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

724. Find Pivot Index/Program.cs

@@ -0,0 +1,11 @@
+namespace _724._Find_Pivot_Index
+{
+    internal class Program
+    {
+        static void Main(string[] args)
+        {
+            Solution sol = new Solution();
+            sol.PivotIndex(new int[] { 1,4,2});
+        }
+    }
+}

724. Find Pivot Index/Solution.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace _724._Find_Pivot_Index;
+
+public class Solution
+{
+    public int PivotIndex(int[] nums)
+    {
+        int[] sumsFromLeft = new int[nums.Length];
+        int[] sumsFromRight = new int[nums.Length];
+        for(int i = 1; i < nums.Length; i++)
+            sumsFromLeft[i] = nums[i - 1] + sumsFromLeft[i - 1];
+
+        for (int i = nums.Length - 2; i >= 0; i--)
+            sumsFromRight[i] = nums[i + 1] + sumsFromRight[i + 1];
+        Console.WriteLine(String.Join(" ", sumsFromLeft));
+        Console.WriteLine(String.Join(" ", sumsFromRight));
+        return 0;
+    }
+}

88. Merge Sorted Array/88. Merge Sorted Array.csproj

@@ -0,0 +1,11 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <RootNamespace>_88._Merge_Sorted_Array</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

88. Merge Sorted Array/Program.cs

@@ -0,0 +1,14 @@
+namespace _88._Merge_Sorted_Array
+{
+    internal class Program
+    {
+        static void Main(string[] args)
+        {
+            int[] n1 = new int[] { 1, 2, 3, 0, 0, 0 }; 
+            int[] n2 = new int[] { 2,5,6 };
+            Solution solution = new Solution();
+            solution.Merge(n1, 3, n2, n2.Length);
+            Console.WriteLine(String.Join(" ", n1));
+        }
+    }
+}

88. Merge Sorted Array/Solution.cs

@@ -0,0 +1,42 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace _88._Merge_Sorted_Array;
+
+public class Solution
+{
+    public void Merge(int[] nums1, int m, int[] a2, int n)
+    {
+        int[] a1 = new int[m];
+        for(int i = 0; i < m; i++)
+            a1[i] = nums1[i];
+        int resIndex = 0;
+        int a1Index = 0, a2Index = 0;
+        while (resIndex < nums1.Length)
+        {
+            int? n1 = a1Index < a1.Length ? a1[a1Index] : null;
+            int? n2 = a2Index < a2.Length ? a2[a2Index] : null;
+            int toWrite = 0;
+            if (n1 != null && n2 != null)
+            {
+                toWrite = Math.Min(n1.Value,n2.Value);
+                if (n1 < n2)
+                    a1Index++;
+                else
+                    a2Index++;
+            }
+            else if(n1!=null)
+            {
+                toWrite = n1.Value;
+                a1Index++;
+            }
+            else if(n2!=null)
+            {
+                toWrite = n2.Value;
+                a2Index++;
+            }
+            nums1[resIndex++] = toWrite;
+        }
+    }
+}

Leetcode.sln

@@ -0,0 +1,73 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.3.32901.215
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "1480. Running Sum of 1d Array", "1480. Running Sum of 1d Array\1480. Running Sum of 1d Array.csproj", "{9B7BDB44-0BFF-412B-A5D6-85D17BCDABF2}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "724. Find Pivot Index", "724. Find Pivot Index\724. Find Pivot Index.csproj", "{BC5BBAB9-1773-4CFB-95F3-28B00F1AE9A4}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "217. Contains Duplicate", "217. Contains Duplicate\217. Contains Duplicate.csproj", "{E21F0BDF-460A-4B8D-8883-EEA5685944F3}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "53. Maximum Subarray", "53. Maximum Subarray\53. Maximum Subarray.csproj", "{E0110066-D8FE-465D-A3FC-E141E80CDCC2}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "1. Two Sum", "1. Two Sum\1. Two Sum.csproj", "{F5685CDB-BFC9-46A1-AF6D-15B6045D4643}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "88. Merge Sorted Array", "88. Merge Sorted Array\88. Merge Sorted Array.csproj", "{52F34DF1-C947-43F1-9968-21C5F99E114A}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "205. Isomorphic Strings", "205. Isomorphic Strings\205. Isomorphic Strings.csproj", "{0F02F764-E6BC-457A-86C1-03F8ABDD0531}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "392. Is Subsequence", "392. Is Subsequence\392. Is Subsequence.csproj", "{82D9F372-85D0-4293-932D-6F90D4AF9CBD}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "350. Intersection of Two Arrays II", "350. Intersection of Two Arrays II\350. Intersection of Two Arrays II.csproj", "{3EDA43F9-22B1-4CFE-9912-031FFAA2200E}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{9B7BDB44-0BFF-412B-A5D6-85D17BCDABF2}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{9B7BDB44-0BFF-412B-A5D6-85D17BCDABF2}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{9B7BDB44-0BFF-412B-A5D6-85D17BCDABF2}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{9B7BDB44-0BFF-412B-A5D6-85D17BCDABF2}.Release|Any CPU.Build.0 = Release|Any CPU
+		{BC5BBAB9-1773-4CFB-95F3-28B00F1AE9A4}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{BC5BBAB9-1773-4CFB-95F3-28B00F1AE9A4}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{BC5BBAB9-1773-4CFB-95F3-28B00F1AE9A4}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{BC5BBAB9-1773-4CFB-95F3-28B00F1AE9A4}.Release|Any CPU.Build.0 = Release|Any CPU
+		{E21F0BDF-460A-4B8D-8883-EEA5685944F3}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{E21F0BDF-460A-4B8D-8883-EEA5685944F3}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{E21F0BDF-460A-4B8D-8883-EEA5685944F3}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{E21F0BDF-460A-4B8D-8883-EEA5685944F3}.Release|Any CPU.Build.0 = Release|Any CPU
+		{E0110066-D8FE-465D-A3FC-E141E80CDCC2}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{E0110066-D8FE-465D-A3FC-E141E80CDCC2}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{E0110066-D8FE-465D-A3FC-E141E80CDCC2}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{E0110066-D8FE-465D-A3FC-E141E80CDCC2}.Release|Any CPU.Build.0 = Release|Any CPU
+		{F5685CDB-BFC9-46A1-AF6D-15B6045D4643}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{F5685CDB-BFC9-46A1-AF6D-15B6045D4643}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{F5685CDB-BFC9-46A1-AF6D-15B6045D4643}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{F5685CDB-BFC9-46A1-AF6D-15B6045D4643}.Release|Any CPU.Build.0 = Release|Any CPU
+		{52F34DF1-C947-43F1-9968-21C5F99E114A}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{52F34DF1-C947-43F1-9968-21C5F99E114A}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{52F34DF1-C947-43F1-9968-21C5F99E114A}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{52F34DF1-C947-43F1-9968-21C5F99E114A}.Release|Any CPU.Build.0 = Release|Any CPU
+		{0F02F764-E6BC-457A-86C1-03F8ABDD0531}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{0F02F764-E6BC-457A-86C1-03F8ABDD0531}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{0F02F764-E6BC-457A-86C1-03F8ABDD0531}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{0F02F764-E6BC-457A-86C1-03F8ABDD0531}.Release|Any CPU.Build.0 = Release|Any CPU
+		{82D9F372-85D0-4293-932D-6F90D4AF9CBD}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{82D9F372-85D0-4293-932D-6F90D4AF9CBD}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{82D9F372-85D0-4293-932D-6F90D4AF9CBD}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{82D9F372-85D0-4293-932D-6F90D4AF9CBD}.Release|Any CPU.Build.0 = Release|Any CPU
+		{3EDA43F9-22B1-4CFE-9912-031FFAA2200E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{3EDA43F9-22B1-4CFE-9912-031FFAA2200E}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{3EDA43F9-22B1-4CFE-9912-031FFAA2200E}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{3EDA43F9-22B1-4CFE-9912-031FFAA2200E}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {4CC0BCE7-4740-4C5D-990B-11428B9F1BD8}
+	EndGlobalSection
+EndGlobal

Leetcode/.gitattributes

@@ -0,0 +1,2 @@
+# Auto detect text files and perform LF normalization
+* text=auto

Leetcode/.gitignore

@@ -0,0 +1,398 @@
+## Ignore Visual Studio temporary files, build results, and
+## files generated by popular Visual Studio add-ons.
+##
+## Get latest from https://github.com/github/gitignore/blob/main/VisualStudio.gitignore
+
+# User-specific files
+*.rsuser
+*.suo
+*.user
+*.userosscache
+*.sln.docstates
+
+# User-specific files (MonoDevelop/Xamarin Studio)
+*.userprefs
+
+# Mono auto generated files
+mono_crash.*
+
+# Build results
+[Dd]ebug/
+[Dd]ebugPublic/
+[Rr]elease/
+[Rr]eleases/
+x64/
+x86/
+[Ww][Ii][Nn]32/
+[Aa][Rr][Mm]/
+[Aa][Rr][Mm]64/
+bld/
+[Bb]in/
+[Oo]bj/
+[Ll]og/
+[Ll]ogs/
+
+# Visual Studio 2015/2017 cache/options directory
+.vs/
+# Uncomment if you have tasks that create the project's static files in wwwroot
+#wwwroot/
+
+# Visual Studio 2017 auto generated files
+Generated\ Files/
+
+# MSTest test Results
+[Tt]est[Rr]esult*/
+[Bb]uild[Ll]og.*
+
+# NUnit
+*.VisualState.xml
+TestResult.xml
+nunit-*.xml
+
+# Build Results of an ATL Project
+[Dd]ebugPS/
+[Rr]eleasePS/
+dlldata.c
+
+# Benchmark Results
+BenchmarkDotNet.Artifacts/
+
+# .NET Core
+project.lock.json
+project.fragment.lock.json
+artifacts/
+
+# ASP.NET Scaffolding
+ScaffoldingReadMe.txt
+
+# StyleCop
+StyleCopReport.xml
+
+# Files built by Visual Studio
+*_i.c
+*_p.c
+*_h.h
+*.ilk
+*.meta
+*.obj
+*.iobj
+*.pch
+*.pdb
+*.ipdb
+*.pgc
+*.pgd
+*.rsp
+*.sbr
+*.tlb
+*.tli
+*.tlh
+*.tmp
+*.tmp_proj
+*_wpftmp.csproj
+*.log
+*.tlog
+*.vspscc
+*.vssscc
+.builds
+*.pidb
+*.svclog
+*.scc
+
+# Chutzpah Test files
+_Chutzpah*
+
+# Visual C++ cache files
+ipch/
+*.aps
+*.ncb
+*.opendb
+*.opensdf
+*.sdf
+*.cachefile
+*.VC.db
+*.VC.VC.opendb
+
+# Visual Studio profiler
+*.psess
+*.vsp
+*.vspx
+*.sap
+
+# Visual Studio Trace Files
+*.e2e
+
+# TFS 2012 Local Workspace
+$tf/
+
+# Guidance Automation Toolkit
+*.gpState
+
+# ReSharper is a .NET coding add-in
+_ReSharper*/
+*.[Rr]e[Ss]harper
+*.DotSettings.user
+
+# TeamCity is a build add-in
+_TeamCity*
+
+# DotCover is a Code Coverage Tool
+*.dotCover
+
+# AxoCover is a Code Coverage Tool
+.axoCover/*
+!.axoCover/settings.json
+
+# Coverlet is a free, cross platform Code Coverage Tool
+coverage*.json
+coverage*.xml
+coverage*.info
+
+# Visual Studio code coverage results
+*.coverage
+*.coveragexml
+
+# NCrunch
+_NCrunch_*
+.*crunch*.local.xml
+nCrunchTemp_*
+
+# MightyMoose
+*.mm.*
+AutoTest.Net/
+
+# Web workbench (sass)
+.sass-cache/
+
+# Installshield output folder
+[Ee]xpress/
+
+# DocProject is a documentation generator add-in
+DocProject/buildhelp/
+DocProject/Help/*.HxT
+DocProject/Help/*.HxC
+DocProject/Help/*.hhc
+DocProject/Help/*.hhk
+DocProject/Help/*.hhp
+DocProject/Help/Html2
+DocProject/Help/html
+
+# Click-Once directory
+publish/
+
+# Publish Web Output
+*.[Pp]ublish.xml
+*.azurePubxml
+# Note: Comment the next line if you want to checkin your web deploy settings,
+# but database connection strings (with potential passwords) will be unencrypted
+*.pubxml
+*.publishproj
+
+# Microsoft Azure Web App publish settings. Comment the next line if you want to
+# checkin your Azure Web App publish settings, but sensitive information contained
+# in these scripts will be unencrypted
+PublishScripts/
+
+# NuGet Packages
+*.nupkg
+# NuGet Symbol Packages
+*.snupkg
+# The packages folder can be ignored because of Package Restore
+**/[Pp]ackages/*
+# except build/, which is used as an MSBuild target.
+!**/[Pp]ackages/build/
+# Uncomment if necessary however generally it will be regenerated when needed
+#!**/[Pp]ackages/repositories.config
+# NuGet v3's project.json files produces more ignorable files
+*.nuget.props
+*.nuget.targets
+
+# Microsoft Azure Build Output
+csx/
+*.build.csdef
+
+# Microsoft Azure Emulator
+ecf/
+rcf/
+
+# Windows Store app package directories and files
+AppPackages/
+BundleArtifacts/
+Package.StoreAssociation.xml
+_pkginfo.txt
+*.appx
+*.appxbundle
+*.appxupload
+
+# Visual Studio cache files
+# files ending in .cache can be ignored
+*.[Cc]ache
+# but keep track of directories ending in .cache
+!?*.[Cc]ache/
+
+# Others
+ClientBin/
+~$*
+*~
+*.dbmdl
+*.dbproj.schemaview
+*.jfm
+*.pfx
+*.publishsettings
+orleans.codegen.cs
+
+# Including strong name files can present a security risk
+# (https://github.com/github/gitignore/pull/2483#issue-259490424)
+#*.snk
+
+# Since there are multiple workflows, uncomment next line to ignore bower_components
+# (https://github.com/github/gitignore/pull/1529#issuecomment-104372622)
+#bower_components/
+
+# RIA/Silverlight projects
+Generated_Code/
+
+# Backup & report files from converting an old project file
+# to a newer Visual Studio version. Backup files are not needed,
+# because we have git ;-)
+_UpgradeReport_Files/
+Backup*/
+UpgradeLog*.XML
+UpgradeLog*.htm
+ServiceFabricBackup/
+*.rptproj.bak
+
+# SQL Server files
+*.mdf
+*.ldf
+*.ndf
+
+# Business Intelligence projects
+*.rdl.data
+*.bim.layout
+*.bim_*.settings
+*.rptproj.rsuser
+*- [Bb]ackup.rdl
+*- [Bb]ackup ([0-9]).rdl
+*- [Bb]ackup ([0-9][0-9]).rdl
+
+# Microsoft Fakes
+FakesAssemblies/
+
+# GhostDoc plugin setting file
+*.GhostDoc.xml
+
+# Node.js Tools for Visual Studio
+.ntvs_analysis.dat
+node_modules/
+
+# Visual Studio 6 build log
+*.plg
+
+# Visual Studio 6 workspace options file
+*.opt
+
+# Visual Studio 6 auto-generated workspace file (contains which files were open etc.)
+*.vbw
+
+# Visual Studio 6 auto-generated project file (contains which files were open etc.)
+*.vbp
+
+# Visual Studio 6 workspace and project file (working project files containing files to include in project)
+*.dsw
+*.dsp
+
+# Visual Studio 6 technical files 
+*.ncb
+*.aps
+
+# Visual Studio LightSwitch build output
+**/*.HTMLClient/GeneratedArtifacts
+**/*.DesktopClient/GeneratedArtifacts
+**/*.DesktopClient/ModelManifest.xml
+**/*.Server/GeneratedArtifacts
+**/*.Server/ModelManifest.xml
+_Pvt_Extensions
+
+# Paket dependency manager
+.paket/paket.exe
+paket-files/
+
+# FAKE - F# Make
+.fake/
+
+# CodeRush personal settings
+.cr/personal
+
+# Python Tools for Visual Studio (PTVS)
+__pycache__/
+*.pyc
+
+# Cake - Uncomment if you are using it
+# tools/**
+# !tools/packages.config
+
+# Tabs Studio
+*.tss
+
+# Telerik's JustMock configuration file
+*.jmconfig
+
+# BizTalk build output
+*.btp.cs
+*.btm.cs
+*.odx.cs
+*.xsd.cs
+
+# OpenCover UI analysis results
+OpenCover/
+
+# Azure Stream Analytics local run output
+ASALocalRun/
+
+# MSBuild Binary and Structured Log
+*.binlog
+
+# NVidia Nsight GPU debugger configuration file
+*.nvuser
+
+# MFractors (Xamarin productivity tool) working folder
+.mfractor/
+
+# Local History for Visual Studio
+.localhistory/
+
+# Visual Studio History (VSHistory) files
+.vshistory/
+
+# BeatPulse healthcheck temp database
+healthchecksdb
+
+# Backup folder for Package Reference Convert tool in Visual Studio 2017
+MigrationBackup/
+
+# Ionide (cross platform F# VS Code tools) working folder
+.ionide/
+
+# Fody - auto-generated XML schema
+FodyWeavers.xsd
+
+# VS Code files for those working on multiple tools
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+*.code-workspace
+
+# Local History for Visual Studio Code
+.history/
+
+# Windows Installer files from build outputs
+*.cab
+*.msi
+*.msix
+*.msm
+*.msp
+
+# JetBrains Rider
+*.sln.iml

Leetcode/Leetcode.csproj

@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

Leetcode/Program.cs

@@ -0,0 +1,10 @@
+namespace Leetcode
+{
+    internal class Program
+    {
+        static void Main(string[] args)
+        {
+            Console.WriteLine("Hello, World!");
+        }
+    }
+}