Solution: Find Symmetric Pairs in a List
Explore how to find symmetric pairs in a list of pairs by applying hashing. Learn to use sets for efficient lookups and understand the algorithm's time and space complexity. This lesson helps you implement a solution that identifies pairs where both [a, b] and [b, a] exist, preparing you for coding interview challenges involving hashing.
We'll cover the following...
We'll cover the following...
Statement
Given a list of pairs, nums, find all the symmetric pairs from it.
A symmetric pair is defined as a pair [a, b] such that both [a, b] and [b, a] exist in the list.
If no symmetric pair is found, return an empty list.
Each symmetric pair should be returned once (you may return either
[a, b]or[b, a]).The output can be in any order.
Constraints:
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