✅ Check If Array Pairs Are Divisible by k | LeetCode 1497 | C++ Solution

Problem Link:leetcode.com/p...
🎯 In this video, we solve LeetCode problem 1497 - Check If Array Pairs Are Divisible by k using C++.
This problem tests your ability to find pairs of numbers whose sums are divisible by a given integer k. We'll break down the problem, go through the approach step-by-step, and implement a highly efficient C++ solution.
🔍 Problem Overview: We are given an array arr of integers and a divisor k. Our task is to check whether we can divide the array into pairs such that the sum of every pair is divisible by k.
📘 Examples:
Input: arr = [1,2,3,4,5,10,6,7,8,9], k = 5
Output: true
Input: arr = [1,2,3,4,5,6], k = 7
Output: true
Input: arr = [1,2,3,4,5,6], k = 10
Output: false
We will explain how to handle remainder calculations and check complementing remainders efficiently to determine if the array can be paired as required.
🛠 Solution Approach:
Calculate the remainder of each element when divided by k.
Use a frequency array to count how many times each remainder appears.
Verify if the array can be paired by ensuring certain conditions for the remainders.
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GitHub Solution Repository:
🔗 github.com/raj...
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