Advent of Code 2020 solutions are mostly written on Rascal MPL, Haskell, F# and C. All puzzles done

F# solution

F#, Rascal and Stratego (SDF3)

1. Using rel transitive closure {}+
2. Solution p1 with regex patterns
3. Sollution p1_2 with syntax definition

Cellular automata

Turtle graphics

C solution for faster search

Rascal: regex conversion of given rules to syntax definition
Haskell: rules are set of functions

Manipulating pictures in a form of rings

Rascal and Z3 solution - see generated d21.z3 file and result of run in d21.z3.res

Part 1 - Rascal, part 2 - C.