题解 + Python/Java/C++/Go 代码： Q1 https://leetcode.cn/problems/sum-of-good-numbers/solution/bian-li-pythonjavacgo-by-endlesscheng-uyrp/ Q2 https://leetcode.cn/problems/separate-squares-i/solution/zheng-shu-er-fen-pythonjavacgo-by-endles-8yn5/ Q3 https://leetcode.cn/problems/separate-squares-ii/solution/lazy-xian-duan-shu-sao-miao-xian-pythonj-eeqk/ Q4 https://leetcode.cn/problems/shortest-matching-substring/solution/xian-xing-zuo-fa-kmpmei-ju-zhong-jian-sa-5qow/
本题视频讲解，欢迎点赞关注~