Web Reference: Feb 13, 2026 · Two pointers is really an easy and effective technique that is typically used for Two Sum in Sorted Arrays, Closest Two Sum, Three Sum, Four Sum, Trapping Rain Water and many other popular interview questions. Iterate through the array with the two pointers and check if the sum of the two numbers is equal to the target. If the sum is equal to the target, return the indices of the two numbers. Your task is to find two numbers in the array that add up to the target value and return their indices. The problem guarantees that there will be exactly one valid solution - meaning there's exactly one pair of numbers that sum to the target.
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