memo

gistfile1.rb

MAX = 30
AMAX = 10.0
BMAX = 20.0

def limit_page(count_a, count_b)
  ap = (count_a / AMAX).ceil
  bp = (count_b / BMAX).ceil
  return ap, bp if ap == bp

  if ap < bp
    return ap, limit(ap, count_a, count_b, AMAX, BMAX)
  elsif ap > bp
    return limit(bp, count_b, count_a, BMAX, AMAX), bp
  end
end

def limit(less_page, less_count, more_count, less_max, more_max)
  m = less_count % less_max
  more_count1 = ((less_page + 1) * more_max) - m
  more_page = (more_count - more_count1) / more_max
  (less_page + more_page).ceil
end

p limit_page(10, 20)
p limit_page(10, 30)
p limit_page(20, 20)
p limit_page(28, 50)
p limit_page(30, 2000)