https://blog.gongquiz.com/2023/05/21/%ed%99%a9%ec%82%b0-49g%ec%9d%84-%eb%ac%bc%ec%97%90-%eb%85%b9%ec%97%ac-%ec%9a%a9%ec%95%a1-1l%ec%9d%84-%eb%a7%8c%eb%93%a4%ec%97%88%eb%8b%a4-%ec%9d%b4-%ec%88%98%ec%9a%a9%ec%95%a1%ec%9d%98-%eb%aa%b0/