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Solution: Count Pairs Whose Sum is Less than Target

Explore how to apply the two pointers approach to count distinct pairs in a sorted array with sums less than a target value. Understand sorting benefits, pointer movement strategies, and how to efficiently calculate valid pairs while analyzing time and space complexity.

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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