This is my collection of apps used to solve the Advent of Code 2018 puzzles. They are written in Rust 2018 Edition, which currently requires the nightly compiler.
The root is a Cargo workspace with subfolders containing an application for each day. Each app accepts its input data on stdin. To run a particular app, change to the appropriate dayN folder and execute the equivalent of the following for your shell:
cat input | cargo run --release