算法题单 https://leetcode.cn/circle/discuss/RvFUtj/
题解 + Python/Java/C++/Go 代码：
- Q1 https://leetcode.cn/problems/unique-3-digit-even-numbers/solution/bao-li-pythonjavacgo-by-endlesscheng-uqp5/
- Q2 https://leetcode.cn/problems/design-spreadsheet/solution/ha-xi-biao-mo-ni-pythonjavacgo-by-endles-jgip/
- Q3 https://leetcode.cn/problems/longest-common-prefix-of-k-strings-after-removal/solution/pai-xu-lcp-xing-zhi-jian-ji-xie-fa-pytho-6p8e/
- Q4 https://leetcode.cn/problems/longest-special-path-ii/solution/shu-shang-hua-chuang-zhi-xu-zai-3425-de-xqm73/
具体请看 视频讲解，欢迎点赞关注~