Скачать или смотреть Check If Array Pairs Are Divisible by k| Leetcode 1497|remainder theorem |leetcode must do array DSA

Question link:- https://leetcode.com/problems/check-i...

Given an array of integers array of even length n and an integer k.

We want to divide the array into exactly n / 2 pairs such that the sum of each pair is divisible by k.

Return true If you can find a way to do that or false otherwise.

Check If Array Pairs Are Divisible by k
1497. Check If Array Pairs Are Divisible by k
Check If Array Pairs Are Divisible by k
1497. Check If Array Pairs Are Divisible by k

remainder theorem-based DSA question
must do DSA questions




i am keeping my approach very simple, i am just creating the modulus of all the number with the K and i am using remainder theorem concept to handle the negative values as well and storing the frequencies in HashMap. now i am again traversing throw my array and generating Mod and checking the frequency of mod and (k-mod) , if its not equal i will return false, also in case if the mod is 0 in that case i am checking if its frequency is odd then return false else continue. finally if i am coming out of loop i need to return true.
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