Solution: Find Symmetric Pairs in a List
Explore how to identify symmetric pairs in a list by using hash sets for efficient lookups. Understand the algorithm that checks for reversed pairs and learn the implementation with Python code. This lesson helps you master using hash tables to solve common algorithm problems with linear time complexity.
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:
nums.length...