#!/bin/env ruby

#part 1
report = File.readlines('./input').map(&:strip)
masks = []
report[0].length.times{ masks.push(2 ** _1) }
report.map!{ _1.to_i(2) }
gamma = 0

masks.each do |mask|
    if report.map{ mask & _1 }.reject(&:zero?).count > report.count / 2
        gamma += mask
    end
end

epsilon = gamma ^ masks.sum
puts "Gamma is #{gamma}"
puts "Epsilon is #{epsilon}"
puts "Power is #{gamma * epsilon}"