题解 + Python/Java/C++/Go 代码：
- Q1 https://leetcode.cn/problems/find-indices-of-stable-mountains/solution/bian-li-pythonjavacgo-by-endlesscheng-7hf1/
- Q2 https://leetcode.cn/problems/find-a-safe-walk-through-a-grid/solution/0-1-bfs-xian-xing-zuo-fa-pythonjavacgo-b-zlzq/
- Q3 https://leetcode.cn/problems/find-the-maximum-sequence-value-of-array/solution/qian-hou-zhui-fen-jie-er-wei-0-1-bei-bao-8icz/
- Q4 https://leetcode.cn/problems/length-of-the-longest-increasing-path/solution/pai-xu-lispythonjavacgo-by-endlesscheng-803g/
具体请看 视频讲解，欢迎点赞关注~