2824. Count Pairs Whose Sum is Less than Target

LeetCodeArrayTwo PointersBinary SearchSortingOpen on judge ↗

Given a 0-indexed integer array nums of length n and an integer target, return the number of pairs (i, j) where 0 <= i < j < n and nums[i] + nums[j] < target. Example 1: Input: nums = [-1,1,2,3,1], target = 2 Output: 3 Explanation: There are 3 pairs of indices that satisfy the conditions in the statement: - (0, 1) since 0 < 1 and nums[0] + nums[1] = 0 < target - (0, 2) since 0 < 2 and nums[0] +

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solution.cppC++17

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