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Solution: Count Pairs Whose Sum is Less than Target

Explore how to efficiently count pairs in an integer array whose sums are less than a given target by applying the two pointers technique. This lesson helps you understand sorting arrays and using two pointers to reduce complexity, enabling you to solve such problems with clear logic and code.

Statement

You are given a 0-indexed integer array, nums, of length nn, and an integer target. Your task is to determine the number of distinct pairs of indexes (i,j)(i, j) such that:

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