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Grokking the Coding Interview Patterns in C++

Solution: Longest Consecutive Sequence

Explore how to apply the union find technique to solve the longest consecutive sequence problem in an unsorted array. Understand how to treat consecutive elements as connected components, combine them efficiently, and compute the longest sequence length with optimal time and space 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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