Submission #236434

---

Source Code Expand

def is_uru?(year)
  if year % 4 == 0
    if year % 100 == 0
      if year % 400 == 0
        return true
      end
      return false
    end
    return true
  end
  return false
end

a, b = gets.strip.chomp.split(' ').map{|i| i.to_i}

ad = (a / 400 + 1) * 400

bd = (b / 400) * 400

unko = ((bd - ad) / 400) * 97

cnt = 0

a.upto(ad - 1) do |y|
  cnt += 1 if is_uru?(y)
end

bd.upto(b) do |y|
  cnt += 1 if is_uru?(y)
end

puts cnt + unko

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