#!/usr/koeki/bin/ruby

people = 0  
video = 0   
day = 0     

t_people = 0  
t_video = 0   

open("iimoriyama.dat", "r") do |rental|     
  while shop = rental.gets
    #  p shop
    # print shop
    if /(\d+)\s+(\d+)/ =~ shop
      people = $1.to_i
      video  = $2.to_f
      printf("%d 日目: \t%d 人 \t%d 本\t\t 売上げ %d 円\n", 
             day + 1, people, video, video * 100)
      t_people += people
      t_video += video
      day += 1
    end
  end
end

# p people
# p day

printf("%d 人が %2.0f 本借りていきました\n", t_people, t_video)
printf("一日の平均売上げは %d 円です\n", t_video * 100 / day)
printf("1 人あたり借りた平均は %2.1f 本です\n", t_video / t_people )