Solution: Find Symmetric Pairs in an Array
Explore how to identify symmetric pairs in an array by using hashing with an unordered set. Learn to implement the solution efficiently in C++ and understand the algorithm's time and space complexity to improve your coding interview skills.
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Statement
Given an array 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 array.
If no symmetric pair is found, return an empty array.
Each symmetric pair should be returned once (you may return either
[a, b]or[b, a]).The output can be in any order.
Constraints:
nums.length...