You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
68 lines
1.5 KiB
68 lines
1.5 KiB
4 years ago
|
# require "bundler/inline"
|
||
|
|
|
||
|
|
# gemfile do
|
||
|
|
# source "https://rubygems.org"
|
||
|
|
# gem "parslet"
|
||
|
|
# end
|
||
|
|
|
||
|
|
rules, messages = ARGF.read.split("\n\n")
|
||
|
|
|
||
|
|
# class Day19 < Parslet::Parser
|
||
|
|
# root(:rule_0)
|
||
|
|
# end
|
||
|
|
|
||
|
|
# rules = rules.split("\n").map {|rule| rule.split(": ") }.to_h
|
||
|
|
# rules["8"] = "42 | 42 8"
|
||
|
|
# rules["11"] = "42 31 | 42 11 31"
|
||
|
|
# rules.each do |rule, sub_rules|
|
||
|
|
# sub_rules = sub_rules.split(" | ").map {|sub_rule|
|
||
|
|
# sub_rule.split(/\s+/).map {|sub_sub_rule|
|
||
|
|
# sub_sub_rule =~ /^\d+$/ ? "rule_#{sub_sub_rule}" : "str(#{sub_sub_rule})"
|
||
|
|
# }.join(" >> ")
|
||
|
|
# }.join(" | ")
|
||
|
|
# rule = "rule(:rule_#{rule}) { #{sub_rules} }"
|
||
|
|
# p rule
|
||
|
|
|
||
|
|
# Day19.class_eval(rule)
|
||
|
|
# end
|
||
|
|
|
||
|
|
# PARSER = Day19.new
|
||
|
|
# def parsable?(input)
|
||
|
|
# !!PARSER.parse(input)
|
||
|
|
# rescue
|
||
|
|
# false
|
||
|
|
# end
|
||
|
|
# puts messages.split("\n").select {|line| parsable?(line) }
|
||
|
|
|
||
|
|
# begin
|
||
|
|
# p PARSER.parse("bbbbbbbaaaabbbbaaabbabaaa")
|
||
|
|
# rescue Parslet::ParseFailed => failure
|
||
|
|
# puts failure.parse_failure_cause.ascii_tree
|
||
|
|
# end
|
||
|
|
|
||
|
|
rules = rules.split("\n").map {|line|
|
||
|
|
line.split(": ")
|
||
|
|
}.to_h
|
||
|
|
|
||
|
|
rule = rules["0"]
|
||
|
|
while rule =~ /\d/
|
||
|
|
rule.gsub!(/\d+/) {|r|
|
||
|
|
case r
|
||
|
|
when "8"
|
||
|
|
"(?:42)+"
|
||
|
|
when "11"
|
||
|
|
"(?:#{(1..5).map {|i| (Array.new(i, "42") + Array.new(i, "31")).join(" ") }.join(" | ")})"
|
||
|
|
else
|
||
|
|
value = rules.fetch(r)
|
||
|
|
value = value[1..-2] if value =~ /^"\w+"$/
|
||
|
|
"(?:#{value})"
|
||
|
|
end
|
||
|
|
}
|
||
|
|
end
|
||
|
|
rule.gsub!(" ", "")
|
||
|
|
while rule =~ /\(\?:\w+\)/
|
||
|
|
rule.gsub!(/\(\?:(\w+)\)/, '\1')
|
||
|
|
end
|
||
|
|
|
||
|
|
p messages.split("\n").count {|m| m =~ /^#{rule}$/ }
|