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Hash Code CLI

A .NET 9.0 console application to explore and run Google Hash Code challenges.

Features

  • Browse challenges by year: View all Hash Code challenges organized by year
  • Search challenges: Search for specific challenges by name, description, or round
  • View challenge details: See full problem descriptions and solution explanations
  • Run solutions: Execute solutions on challenge input files (where available)
  • Interactive CLI: Beautiful terminal UI powered by Spectre.Console

Requirements

  • .NET 9.0 SDK or later

Building

cd src/HashCodeCli
dotnet build

Running

cd src/HashCodeCli
dotnet run

Or after building:

cd src/HashCodeCli/bin/Debug/net9.0
./HashCodeCli

Available Challenges

2014

  • Street View Routing (Final Round) - Optimize Street View car routes to maximize city coverage

2015

  • Optimize a Data Center (Qualification Round) - Optimize server placement to maximize availability
  • Loon (Final Round) - Plan altitude adjustments for Internet-providing balloons

Project Structure

HashCodeCli/
├── Models/
│   └── Challenge.cs          # Challenge data model
├── Solutions/
│   ├── StreetViewSolution.cs # 2014 Street View solution
│   └── DataCenterSolution.cs # 2015 Data Center solution
├── ChallengeRepository.cs     # Challenge data repository
└── Program.cs                 # Main CLI application

Adding New Challenges

  1. Add challenge data to ChallengeRepository.cs
  2. If the challenge has a runnable solution, create a new solution class in the Solutions/ directory
  3. Link the solution runner in the Challenge record

Technologies Used

  • .NET 9.0
  • C# 13
  • Spectre.Console (for terminal UI)