How to Solve Finding Pairs With a Certain Sum Problem
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Finding Pairs With a Certain Sum
You are given two integer arrays nums1 and nums2. You are tasked to implement a data structure that supports queries of two types: Add a positive integer to an element of a given index in the array nu...
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Understanding the Finding Pairs With a Certain Sum Problem
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Problem Statement
You are given two integer arrays nums1 and nums2. You are tasked to implement a data structure that supports queries of two types: Add a positive integer to an element of a given index in the array nums2. Count the number of pairs (i, j) such that nums1[i] + nums2[j] equals a given value (0 <= i < nums1.length and 0 <= j < nums2.length). Implement the FindSumPairs class: FindSumPairs(int[] nums1, int[] nums2) Initializes the FindSumPairs object with two integer arrays nums1 and nums2. void add(int index, int val) Adds val to nums2[index], i.e., apply nums2[index] += val. int count(int tot) Returns the number of pairs (i, j) such that nums1[i] + nums2[j] == tot.
Finding Pairs With a Certain Sum
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Examples
Example inputExample outputConstraints
1 <= nums1.length <= 10001 <= nums2.length <= 1051 <= nums1[i] <= 1091 <= nums2[i] <= 1050 <= index < nums2.length1 <= val <= 1051 <= tot <= 109At most 1000 calls are made to add and count each.How Interview Coder Helps with Leetcode Problems
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