Coding

Longest Consecutive Sequence

Determine the length of the longest consecutive elements sequence.

Input: nums = [0,3,7,2,5,8,4,6,0,1]

Output: 9

Explanation: The longest consecutive sequence is 0 through 8 (length 9), utilizing a hash set to check connectivity in linear time.

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Interview question asked to Software Engineers interviewing at DataRobot, Xandr, Doubtnut and other companies. Original question asked: Longest Consecutive Sequence.