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Count Pairs Whose Sum is Less than Target

Explore how to determine the number of distinct pairs in an integer array whose sums are less than a given target. Learn to apply the two pointers technique to solve this problem efficiently, enhancing your ability to recognize and implement this approach in coding interviews.

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:

  • 0i<j<n0 \leq i < j < n ...