第五週：編碼

https://www.dropbox.com/s/kr6au6qr5r2l9ig/s18014108%E9%BB%83%E5%AD%9F%E8%BB%92-%E9%96%8B%E6%94%BE%E6%80%A7%E7%B7%A8%E7%A2%BC%28101.10.14%29.docx