[2023][ruby][8.2] til about Integer#lcm

12 months ago · ca65631b37
parent 5d7fc5b308
commit ca65631b37
1 changed files with 1 additions and 5 deletions
--- a/2023/ruby/day_08.rb
+++ b/2023/ruby/day_08.rb
@ -23,8 +23,4 @@ p steps.("AAA", /ZZZ/)
 # part two
 nodes = network.keys.select { _1.end_with?(?A) }
 node_steps = nodes.map { steps.(_1, /Z$/) }
-p node_steps
+p node_steps.inject(1, :lcm)
  .map { Prime.prime_division(_1).to_h }
  .inject {|acc, fac| acc.merge(fac) {|_,old,new| [old, new].max}}
  .map { _1**_2 }
  .inject(:*)