From b5133271c71a607770fc24d952b521a39f8a6c4c Mon Sep 17 00:00:00 2001 From: Jeremy Kaplan Date: Sun, 1 Dec 2019 12:40:55 -0800 Subject: [PATCH] 2019: Day 1 Part 2 --- 2019/day1/part2.rb | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 2019/day1/part2.rb diff --git a/2019/day1/part2.rb b/2019/day1/part2.rb new file mode 100644 index 0000000..0066be6 --- /dev/null +++ b/2019/day1/part2.rb @@ -0,0 +1,24 @@ +# frozen_string_literal: true + +def fuel_needed(mass) + [(mass / 3).truncate - 2, 0].max +end + +def total_fuel(mass) + fuel = 0 + current = mass + while current.positive? + current = fuel_needed(current) + fuel += current + end + fuel +end + +fuel = 0 +File.open(File.join(__dir__, 'input')) do |file| + file.readlines.each do |line| + mass = line.to_i + fuel += total_fuel(mass) + end +end +puts fuel