https://blog.gongquiz.com/2024/04/26/a3-%eb%98%90%eb%8a%94-acm-%ec%84%a0%eb%b3%b4%eb%8b%a4-3050%e2%84%83-%eb%86%92%ec%9d%80-%ec%98%a8%eb%8f%84%eb%a1%9c-%ea%b0%80%ec%97%b4%ed%95%98%ec%97%ac-%ec%9d%bc%ec%a0%95%ed%95%9c-%ec%8b%9c%ea%b0%84/