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Grokking the Coding Interview Patterns in Python

Solution: Longest Consecutive Sequence

Understand how to solve the longest consecutive sequence problem by representing consecutive elements as connected components with Union Find. Learn to initialize data structures, combine sets, and track maximum sequence length efficiently. This lesson teaches an optimized approach with linear time complexity.

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Statement

Given an unsorted array, nums, your task is to return the length of the longest consecutive sequence of elements. The consecutive sequence of elements is such that there are no missing elements in the sequence. The consecutive elements can be present anywhere in the input array.

Note: Two elements, xx and yy, are called consecutive if the difference between them is equal to 11.

Constraints:

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