Solving the Advent of Code 2020 has never been easier.
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From https://adventofcode.com/2020/about
Advent of Code is an Advent calendar of small programming puzzles for a variety of skill sets and skill levels that can be solved in any programming language you like. People use them as a speed contest, interview prep, company training, university coursework, practice problems, or to challenge each other.
Eclipse Che provides one-click developer workspaces and eliminates local environment configuration for your entire team. Che brings an in-browser IDE, allowing you to code, build, test and run applications from any machine. Che supports a large number of languages through VisualStudio Code extensions.