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# Advent of Code 2018
# AoC2018
This is a repo for my Advent of Code 2018 solutions.
I'll be trying to solve challenges using Ruby and editing in VS Code to learn both better.
I'm using 2018 challenges as a warm up for 2021 AoC.
Link: https://adventofcode.com/
AoC 2018 code.

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#!/bin/env ruby
# Sum all numbers in the text file.
# Part 1
sum = File.readlines('./input').map { |line| line.to_i}.sum
# Part 2
numbers = File.readlines('./input').map { |line| line.to_i}
freqs = [0]
numbers.cycle do |num|
freqs.push(freqs[-1] + num)
break if freqs[0..-2].include?(freqs[-1])
end
puts freqs[-1]