> For the complete documentation index, see [llms.txt](https://851958789.gitbook.io/notes/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://851958789.gitbook.io/notes/0056_merge_intervals/slt.md).

# 思路1 按照start排序，再合并

有点像machine test guide中看最多节目的那道题。

复杂度：Sorting takes O(n log(n)) and merging the intervals takes O(n). So, the resulting algorithm takes O(n log(n)).