problem128

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v1.6.3 Latest Latest Go to latest Published: May 30, 2020 License: MIT Imports: 0 Imported by: 0

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

Your algorithm should run in O(n) complexity.

Example:

Input: [100, 4, 200, 1, 3, 2]
Output: 4
Explanation: The longest consecutive elements sequence is [1, 2, 3, 4]. Therefore its length is 4.

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