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Grokking the Coding Interview Patterns in C#

Solution: Longest Consecutive Sequence

Explore how to solve the longest consecutive sequence problem in an unsorted array by applying the Union Find algorithm. Learn to connect consecutive elements into sets to efficiently determine the longest sequence length in linear time, understanding both time and space complexities of the solution.

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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:

  • 0≤0 \leq nums.lengths ≤103\leq 10^{3}
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