Check If Array Pairs Are Divisible by k | Simplest Explanation | Leetcode 1497 | codestorywithMIK

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This is the 14th Video of our Playlist "Hash Map/ Hash Set Data Structure : Popular Interview Problems" by codestorywithMIK

In this video we will try to solve a good Problem : Check If Array Pairs Are Divisible by k | Simplest Explanation | Dry Run | Leetcode 1497 | codestorywithMIK

I will explain the intuition so easily that you will never forget and start seeing this as cakewalk EASYYY.
We will do live coding after explanation and see if we are able to pass all the test cases.
Also, please note that my Github solution link below contains both C++ as well as JAVA code.

Problem Name : Check If Array Pairs Are Divisible by k | Simplest Explanation | Dry Run | Leetcode 1497 | codestorywithMIK
Company Tags : will update soon

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Summary :
The approach uses remainder arithmetic to solve the problem of determining if the array can be rearranged into pairs whose sums are divisible by a given integer k. Here's a brief summary of the method:

Calculate Remainder Frequencies:

Traverse through the array and compute the remainders when each element is divided by k.
Use an array mp of size k to count the frequency of these remainders, handling negative remainders correctly.
Check Conditions for Valid Pairing:

For elements with a remainder of 0, their frequency must be even to ensure they can be paired.
For other remainders rem, ensure that mp[rem] (frequency of rem) matches mp[k - rem] (frequency of its complement remainder) to allow pairing.
Return Result:

If all conditions are met, return true; otherwise, return false.

✨ Timelines✨
00:00 - Introduction

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Hello bhaiya aapke kaaran mera placement ho gya pine labs sde role
Thank you so much bhaiya itne ache se concepts smjhane k liye aage aur bhi mehnat krunga aapke hi videos dekhkr bs aap ye kaam krna Mt choddiyega 🙏🙏🙏

_Aryan_Chandel

I learnt how to get the remainder for negative numbers -
int remainder = ((num % k) + k) % k
Grateful for your teachings 🙏

SrishtiKapoor-dw

My goal for the end of this year is to cover all remaining topics of DSA like DP, Graphs, Trie, and master the topics which I already studied.

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I'll learn and work in upcoming 3 months to become better at DSA and Development.
Will do DSA whole week and do Dev Projects at weekends.
Thanks @codestorywithMIK 💫

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bhai 3 mahine mein job le lunga maze se ....10-12 ghante padhai krta hun 2 ghnate gym and whey protein kha ke so jata hun yahi routine hai pichle 6 mahine se ...working reallly hard to buy g wagon .

atifakhtar

Bro really helpful videos commenting just because to let you know that i found you one of the best tutor on u tube more than some big name also .... may you get millions of subscribers thank you so much.❤❤.... bs m interview m kuj nh bhul jau😂🙏🏼

GungunSaluja-sybr

going to USA for ms in jan 2025, preparing DSA, mern + rust(in future) and CP (from now) + currently in cut for winter (proper low carb diet), full 3 months grind for everything, your videos always helps, if i am stuck in a daily problem, cur prob count -> 653 target - > 950 until jan 1st + knight + pupil + 3star + rust

adityarao

My goal for the remaining days:
Solve potd daily
Give contests and upsolve ques
Learn react and Springboot
1 or 2 projects
Learn AWS

Anonymous_

I was trying to write my own logic and was facing issues, in Java
two things I learnt
1 - I was having issues with ==, usually only String used to give issues with this, but even for Integers it was creating issue
2 - I was ignoring the remainders if the rem didn't exist in the map, which was causing issues for scenarios where their counter half was present in the map, as we were not checking those....

aizadiqbal

I am also taking up this challenge to be a better version of myself. Improved skills, good health, and happy mind.

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My goal to become a best problem solver by the end of this year and thanks my best inspirational teacher mik

kartikkaushik

Hello Mik Bhaiya,

I'm a 3rd-year engineering student, and I'm facing problems in building a strong command of DSA. Sometimes, I can solve problems on my own, but other times, I feel like I can't overcome certain difficulties. When I see my friends progressing ahead, I start to doubt myself, wondering if I'll ever be able to do it. Watching your videos gives me confidence that I can, but when I try to solve problems on my own, it doesn't always work, and I start feeling more anxious. On top of that, I need to manage both DSA and development, and I'm not sure how to balance the two. Please suggest what I should do. I'm feeling confused.

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WINTER ARC!!
DSA Contests upsolving(leetcode and codeforces) + daily quesn(leetcode)
ML Development projects
Research paper reading + Implementation

Divyansh-nh

kindly request if you could create videos on Fenwick tree concepts like you have done segment tree. Your teaching style would be incredibly valuable in helping others understand this complex topic. Looking forward to your consideration.

harshalyallewar

My goal for the end of the year is to Complete topics like DP and Graph and practice other DSA topics. For development, I have to complete JS and make some good projects using it.

pranavJha

Rule No1: Every time If want to do something, think with peaceful mind that is it required or will it add any value
Rule No2: Follow rule no1

gorrejayasai

can you refer a video where you explained the remainder of negative numbers

notladinesh-iiitk

Bhaiya ye maths modulo properties kese padhe please ek series me maths concept padha dijiye.

HA_edits

Goal : GATE AIR <= 1001
Day 1 : Starting with algorithms, Python and LeetCode Daily Problem.

NabinSharma-nr

My goal is to get into product based company and get better in DSA and DEV

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