Solved Day 13

day13/input

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+Alice would lose 57 happiness units by sitting next to Bob.
+Alice would lose 62 happiness units by sitting next to Carol.
+Alice would lose 75 happiness units by sitting next to David.
+Alice would gain 71 happiness units by sitting next to Eric.
+Alice would lose 22 happiness units by sitting next to Frank.
+Alice would lose 23 happiness units by sitting next to George.
+Alice would lose 76 happiness units by sitting next to Mallory.
+Bob would lose 14 happiness units by sitting next to Alice.
+Bob would gain 48 happiness units by sitting next to Carol.
+Bob would gain 89 happiness units by sitting next to David.
+Bob would gain 86 happiness units by sitting next to Eric.
+Bob would lose 2 happiness units by sitting next to Frank.
+Bob would gain 27 happiness units by sitting next to George.
+Bob would gain 19 happiness units by sitting next to Mallory.
+Carol would gain 37 happiness units by sitting next to Alice.
+Carol would gain 45 happiness units by sitting next to Bob.
+Carol would gain 24 happiness units by sitting next to David.
+Carol would gain 5 happiness units by sitting next to Eric.
+Carol would lose 68 happiness units by sitting next to Frank.
+Carol would lose 25 happiness units by sitting next to George.
+Carol would gain 30 happiness units by sitting next to Mallory.
+David would lose 51 happiness units by sitting next to Alice.
+David would gain 34 happiness units by sitting next to Bob.
+David would gain 99 happiness units by sitting next to Carol.
+David would gain 91 happiness units by sitting next to Eric.
+David would lose 38 happiness units by sitting next to Frank.
+David would gain 60 happiness units by sitting next to George.
+David would lose 63 happiness units by sitting next to Mallory.
+Eric would gain 23 happiness units by sitting next to Alice.
+Eric would lose 69 happiness units by sitting next to Bob.
+Eric would lose 33 happiness units by sitting next to Carol.
+Eric would lose 47 happiness units by sitting next to David.
+Eric would gain 75 happiness units by sitting next to Frank.
+Eric would gain 82 happiness units by sitting next to George.
+Eric would gain 13 happiness units by sitting next to Mallory.
+Frank would gain 77 happiness units by sitting next to Alice.
+Frank would gain 27 happiness units by sitting next to Bob.
+Frank would lose 87 happiness units by sitting next to Carol.
+Frank would gain 74 happiness units by sitting next to David.
+Frank would lose 41 happiness units by sitting next to Eric.
+Frank would lose 99 happiness units by sitting next to George.
+Frank would gain 26 happiness units by sitting next to Mallory.
+George would lose 63 happiness units by sitting next to Alice.
+George would lose 51 happiness units by sitting next to Bob.
+George would lose 60 happiness units by sitting next to Carol.
+George would gain 30 happiness units by sitting next to David.
+George would lose 100 happiness units by sitting next to Eric.
+George would lose 63 happiness units by sitting next to Frank.
+George would gain 57 happiness units by sitting next to Mallory.
+Mallory would lose 71 happiness units by sitting next to Alice.
+Mallory would lose 28 happiness units by sitting next to Bob.
+Mallory would lose 10 happiness units by sitting next to Carol.
+Mallory would gain 44 happiness units by sitting next to David.
+Mallory would gain 22 happiness units by sitting next to Eric.
+Mallory would gain 79 happiness units by sitting next to Frank.
+Mallory would lose 16 happiness units by sitting next to George.

day13/input.testing

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+Alice would gain 54 happiness units by sitting next to Bob.
+Alice would lose 79 happiness units by sitting next to Carol.
+Alice would lose 2 happiness units by sitting next to David.
+Bob would gain 83 happiness units by sitting next to Alice.
+Bob would lose 7 happiness units by sitting next to Carol.
+Bob would lose 63 happiness units by sitting next to David.
+Carol would lose 62 happiness units by sitting next to Alice.
+Carol would gain 60 happiness units by sitting next to Bob.
+Carol would gain 55 happiness units by sitting next to David.
+David would gain 46 happiness units by sitting next to Alice.
+David would lose 7 happiness units by sitting next to Bob.
+David would gain 41 happiness units by sitting next to Carol.

day13/solution.rb

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+#!/bin/env ruby
+require 'pry'
+
+input = File.readlines('./input').map(&:chomp)
+data = {}
+
+input.each do |line|
+  line = line.split
+  data[line[0].to_sym] = {} unless data.has_key?(line[0].to_sym)
+  num = line[2] == 'lose' ? -line[3].to_i : line[3].to_i
+  data[line[0].to_sym][line[-1].delete('.').to_sym] = num
+end
+
+names = input.map { |line| line.split[0].to_sym }.uniq.freeze
+arrangments = []
+names.permutation { |perm| arrangments.push(perm) }
+arrangments.map! { |arrangment| arrangment.push(arrangment[0]) }
+happiness = []
+
+happiness = arrangments.map do |arrangment|
+  arrangment.each_cons(2).map do |name1, name2|
+    data[name1][name2] + data[name2][name1]
+  end.sum
+end
+
+puts "Part 1 Solution: #{happiness.max}"
+# Part 2 (copy/pasting code, too lazy to make a method)
+
+data[:Jeff] = {}
+names.each do |name|
+  data[:Jeff][name] = 0
+  data[name][:Jeff] = 0
+end
+new_names = names.dup
+new_names.push(:Jeff).freeze
+arrangments = []
+new_names.permutation { |perm| arrangments.push(perm) }
+arrangments.map! { |arrangment| arrangment.push(arrangment[0]) }
+happiness = []
+
+happiness = arrangments.map do |arrangment|
+  arrangment.each_cons(2).map do |name1, name2|
+    data[name1][name2] + data[name2][name1]
+  end.sum
+end
+
+puts "Part 2 Solution: #{happiness.max}"
+
+# binding.pry