8th December solution - Advent of Code 2020 - swift

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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 - 8th December 2020

Given is a list of instructions.

  1. Follow instructions until a instruction is about to be run a second time and print result.

  2. Change one instruction to be able to run until the last instruction.

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

The lines variable is an array of strings containing a set of characters of each member given by Advent of Code, which is individual for each user.

Here is the solution:

Overview of all solutions of 2020:

Advent of Code 2020 Solutions Overview