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Problem
The requirement is to efficiently find two indices in an array where the corresponding numbers sum to a given target.
Solution
Implemented a Python function that uses a hash map to find the indices of the two numbers that add up to the target in a single pass.
Changes Proposed
Created the function two_sum(nums, target) to perform the computation.
Used a dictionary to store the indices of numbers for quick lookup.
Ensured the function returns indices in an optimal manner.
Other Changes
Added unit tests for various scenarios to verify function correctness.
Updated the documentation to explain the function's usage clearly.