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Solution: Find Two Numbers That Add up to k—Hashing

Explore how to find two numbers in a list that add up to a given target by applying hashing methods. Learn to implement solutions using dictionaries and sets that run in linear time and understand their space complexity for coding interview preparation.

Statement

Given a list of integers nums and an integer target, k, find two numbers in the list that sum up to the target k.

There is exactly one solution for each input, and each element of the list can only be used once in the solution. The order of the returned elements does not matter.

Constraints:

  • 22 \leq nums.length 103\leq10^3 ...