NeetCode #293LC-2563MediumBinary Search
← Back to All Problems#293 · #2563 · Count the Number of Fair Pairs(统计公平数对的数目)
📌 Problem Statement & Constraints
Given a 0-indexed integer array
nums and two integers lower and upper, return the number of fair pairs: pairs (i, j) with i < j and lower <= nums[i] + nums[j] <= upper. Constraints: 1 <= nums.length <= 10^5, -10^9 <= nums[i], lower, upper <= 10^9.🔒
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