Module day09

Rope Bridge

This solution relies on the Point utility class. Two dimensional problems are common in Advent of Code, so having a decent Point (or Coord or Pos) class in your back pocket is handy.

Functions

apart 🔒

Two knots are considered “apart” if the they are not diagonally adjacent, that is the absolute distance in either x or y axes is greater than 1.

parse

Converts input lines into a pair of Point and integer amount, to indicate direction and magnitude respectively. Then determines the maximum extent of the head so that we can allocate a two dimensional grid.

part1

Simulate a rope length of 2

part2

Simulate a rope length of 10

simulate 🔒

Simulates a rope of arbitrary length.

Type Aliases

Input 🔒

Pair 🔒