From 22f3e6b8b5224be4a482c983c85ba23e4b48420e Mon Sep 17 00:00:00 2001 From: Nathan Lasseter Date: Fri, 4 Dec 2015 01:39:35 +0000 Subject: Day 3. Ruby. Make this C if can BA. --- .gitignore | 1 + day3.input | 1 + day3.rb | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 52 insertions(+) create mode 100644 day3.input create mode 100755 day3.rb diff --git a/.gitignore b/.gitignore index cba7efc..03496f5 100644 --- a/.gitignore +++ b/.gitignore @@ -1 +1,2 @@ a.out +*.swp diff --git a/day3.input b/day3.input new file mode 100644 index 0000000..f7791cc --- /dev/null +++ b/day3.input @@ -0,0 +1 @@ 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diff --git a/day3.rb b/day3.rb new file mode 100755 index 0000000..17fd0ca --- /dev/null +++ b/day3.rb @@ -0,0 +1,50 @@ +#!/usr/bin/env ruby + +map = {:onlysanta => Hash.new(0), :robosanta => Hash.new(0)} +map[:onlysanta][[0,0]] += 1 +map[:robosanta][[0,0]] += 1 + +onlysanta = {:northing => 0, :easting => 0} +santa = {:northing => 0, :easting => 0} +robosanta = {:northing => 0, :easting => 0} + +input = STDIN.readlines.map(&:chomp).join + +input.chars.each_with_index do |ch, idx| + case ch + when '<' + onlysanta[:easting] -= 1 + if idx.odd? then + santa[:easting] -= 1 + else + robosanta[:easting] -= 1 + end + when '>' + onlysanta[:easting] += 1 + if idx.odd? then + santa[:easting] += 1 + else + robosanta[:easting] += 1 + end + when 'v' + onlysanta[:northing] -= 1 + if idx.odd? then + santa[:northing] -= 1 + else + robosanta[:northing] -= 1 + end + when '^' + onlysanta[:northing] += 1 + if idx.odd? then + santa[:northing] += 1 + else + robosanta[:northing] += 1 + end + end + map[:onlysanta][[onlysanta[:easting], onlysanta[:northing]]] += 1 + map[:robosanta][[santa[:easting], santa[:northing]]] += 1 + map[:robosanta][[robosanta[:easting], robosanta[:northing]]] += 1 +end + +puts "Santa only: #{map[:onlysanta].length}" +puts "Robosanta: #{map[:robosanta].length}" -- cgit v1.2.1