> For the complete documentation index, see [llms.txt](https://leetcode-solution-leetcode-pp.gitbook.io/leetcode-solution/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://leetcode-solution-leetcode-pp.gitbook.io/leetcode-solution/hard/2179.-tong-ji-shu-zu-zhong-hao-san-yuan-zu-shu-mu.md).

# 2179. 统计数组中好三元组数目 👍