My Solution to the Josephus Problem.

josephus.rb

def last_man_standing(total)
  total_in_circle = *1..total

  until total_in_circle.size == 1
    for i in (1..((total_in_circle.size.to_f / 2)).ceil)
      if total_in_circle[i] == total_in_circle[total_in_circle.size - 2]
        total_in_circle.delete_at i
        total_in_circle.delete_at(0)
      else
        total_in_circle.delete_at i
      end
    end
  end

  puts total_in_circle[0]
end

(1..1000).each do |x|
  last_man_standing x
end