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.
advent-of-code/2023/ruby/day_06.rb

15 lines
373 B

11 months ago
times, records = ARGF.readlines(chomp: true).map { _1.scan(/\d+/).map(&:to_i) }
# part one
p times.zip(records)
.map {|time, record|
distances = (1...time).map {|hold| (time - hold) * hold }
distances.count { _1 > record }
}
.inject(:*)
# part two
time = times.join.to_i
record = records.join.to_i
p (1...time).count {|hold| (time - hold) * hold > record}