Challenge: Find Symmetric Pairs in an Array
Explore how to find symmetric pairs in an array where both [a, b] and [b, a] exist. This lesson helps you understand hashing fundamentals and apply them in C++ to solve this problem efficiently using hash tables and array manipulation.
We'll cover the following...
We'll cover the following...
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...