https://go-learning-blog.pages.dev/difficulties/hard/ Recent content in Hard on Go 与算法手记 Hugo zh-cn Fri, 03 Apr 2026 18:30:00 +0800 https://go-learning-blog.pages.dev/posts/trapping-rain-water-stack/ Fri, 03 Apr 2026 18:30:00 +0800 https://go-learning-blog.pages.dev/posts/trapping-rain-water-stack/ 接雨水是单调栈的进阶题，重点不只是会写代码，而是理解为什么弹栈时刚好能确定一个凹槽的面积。 https://go-learning-blog.pages.dev/posts/minimum-window-substring/ Fri, 03 Apr 2026 18:00:00 +0800 https://go-learning-blog.pages.dev/posts/minimum-window-substring/ 这道题是滑动窗口进阶版，关键不是单纯扩缩窗口，而是维护“覆盖要求是否满足”和“什么时候可以继续收缩”。