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Longest Consecutive Sequence

Put all numbers in a set, then expand sequences only from values whose previous number is absent. That avoids re-counting the same streak multiple times.

Coding Exercises Medium O(n)

Longest Consecutive Sequence

Put all numbers in a set, then expand sequences only from values whose previous number is absent. That avoids re-counting the same streak multiple times.

Return the length of the longest consecutive sequence in an unsorted array.

#arrays #python #set