Leetcode Longest Consecutive Sequence Java

LeetCode – Longest Consecutive Sequence (Java)

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Given an unsorted array of integers, find the length of the longest consecutive elements sequence. For example, given [100, 4, 200, 1, 3, 2], the longest consecutive elements sequence should be [1, 2, 3, 4]. Its length is 4. Your algorithm should run in O(n) complexity. Java Solution 1 Because it requires O(n) complexity, we … Read more