Running Haskell code

cat input.txt | stack solution.hs "part1"
cat input.txt | stack solution.hs "part2"

Running J code (after entering jconsole)

0!:1 < 'solution.ijs'

Running Rust code

// before you run first time: cargo install rust-script
// Run tests
rust-script --test solution.rs

// Run Rust code with file
rust-script solution.rs input.txt part1