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Grokking the Coding Interview Patterns in C++

Solution: Longest Consecutive Sequence

Explore how to apply the union find pattern to efficiently find the longest consecutive sequence in an unsorted array. Learn to model consecutive elements as connected components, use union and find operations, and track sequence sizes to determine the maximum length. Understand the time and space complexity for this approach and how it improves over naive sorting solutions.

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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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