From 39326a228cea60573c61823f88d82799dec84904 Mon Sep 17 00:00:00 2001 From: Alpha Chen Date: Sun, 13 Dec 2015 09:41:45 -0800 Subject: [PATCH] Day 13.0 --- day_13.rb | 71 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 71 insertions(+) create mode 100644 day_13.rb diff --git a/day_13.rb b/day_13.rb new file mode 100644 index 0000000..74297f0 --- /dev/null +++ b/day_13.rb @@ -0,0 +1,71 @@ +regex = /(\w+) would (\w+) (\d+) happiness units by sitting next to (\w+)/ +happiness = Hash.new {|h,k| h[k] = {} } +DATA.read.scan(regex).each do |left, sign, units, right| + units = units.to_i + units *= (sign == "gain") ? 1 : -1 + happiness[left][right] = units +end + +puts happiness.keys.permutation.map { |arrangement| + arrangement << arrangement.first + arrangement.each_cons(2).map { |left,right| + happiness[left][right] + happiness[right][left] + }.inject(:+) +}.max +__END__ +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.