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Grokking the Coding Interview Patterns in Python

Solution: Longest Consecutive Sequence

Explore solving the longest consecutive sequence problem using the Union Find pattern. Learn to initialize data structures, connect consecutive elements, and efficiently determine the sequence length. This lesson helps improve problem-solving skills for coding interviews by applying graph connectivity concepts 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:

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