求一个未排序数组中，出现的长度最长的连续子序列长度。

Given an unsorted array of integers, find the length of the longest consecutive elements sequence.

youdao

求一个未排序数组中，出现的长度最长的连续子序列长度。

Given an unsorted array of integers, find the length of the longest consecutive elements sequence.

youdao