As part of Advent of Code (adventofcode.com) each day there are two programming tasks to be solved. All solutions are listed here.

I am writing the solutions in Swift with the Playground environment in xCode.

Tasks - 3rd December 2020

1. Count the number of # in a grid when traversing through it going 3 right and 1 down.

2. Count the number of # in a grid when traversing through it, going:

   • 1 right and 1 down,
   • 3 right and 1 down,
   • 5 right and 1 down,
   • 7 right and 1 down,
   • 1 right and 2 down and multiply these results.

For a more detailed description of the tasks check this out.

The lines variable is an array of strings containing the lines given by Advent of Code, which is individual for each user. I use String Extensions for a more convenient solution.

Here is the solution:

Overview of all solutions of 2020:

Advent of Code 2020 Solutions Overview