https://blog.gongquiz.com/2022/08/22/2%ec%a7%84%ec%88%98-0011%ec%97%90%ec%84%9c-2%ec%9d%98-%eb%b3%b4%ec%88%982s-complement%eb%8a%94-%ec%a0%95%eb%b3%b4%ed%86%b5%ec%8b%a0%ea%b8%b0%ec%82%ac-2021%eb%85%84-3%ec%9b%94-13/