Finding 3-Digit Even Numbers | 2 Simple Approaches | Leetcode 2094 | codestorywithMIK
407Whatsapp Community Link : https://www.whatsapp.com/channel/0029Va6kVSjICVfiVdsHgi1A
Hi Everyone, this is the 87th video of our Playlist "Leetcode Easy".
Now we will be solving an easy Problem - Finding 3-Digit Even Numbers | 2 Simple Approaches | Leetcode 2094 | codestorywithMIK
I will explain it in full detail so that it becomes easy to understand. We will find the reason behind everything so that we understand why we did what we did.
And we will do a complete dry run.
Problem Name : Finding 3-Digit Even Numbers | 2 Simple Approaches | Leetcode 2094 | codestorywithMIK
Company Tags : will update later
Code Github(C++ & JAVA) : https://github.com/MAZHARMIK/Interview_DS_Algo/blob/master/Mathematical/Leetcode Easy/Finding 3-Digit Even Numbers.cpp
Leetcode Link : https://leetcode.com/problems/finding-3-digit-even-numbers
My DP Concepts Playlist : • Roadmap for DP | How to Start DP ? | ...
My Graph Concepts Playlist : • Graph Concepts & Qns - 1 : Graph will...
My Segment Tree Concepts Playlist : • Segment Tree | Introduction | Basics ...
My Recursion Concepts Playlist : • Introduction | Recursion Concepts And...
Trie Playlist - • Word Search II (Google, Amazon, Meta,...
Difference Array Technique: Concepts & Qns : • Introduction | What | How | Differenc...
My GitHub Repo for interview preparation : https://github.com/MAZHARMIK/Interview_DS_Algo
Instagram : https://www.instagram.com/codestorywithmik/
Facebook : https://www.facebook.com/people/codestorywithmik/100090524295846/
Twitter : https://twitter.com/CSwithMIK
Subscribe to my channel : / @codestorywithmik
╔═╦╗╔╦╗╔═╦═╦╦╦╦╗╔═╗
║╚╣║║║╚╣╚╣╔╣╔╣║╚╣═╣
╠╗║╚╝║║╠╗║╚╣║║║║║═╣
╚═╩══╩═╩═╩═╩╝╚╩═╩═╝
Video Summary :
Approach 1: Brute-force with Permutations
Iterates over all possible 3-digit combinations using different indices.
Filters valid numbers that are even and have no repeated indices, storing unique results in a set.
Time complexity is effectively O(1) due to bounded loops and small input size.
Approach 2: Frequency-based Enumeration
Counts digit frequencies first, then systematically constructs valid 3-digit even numbers by checking available digits.
Ensures uniqueness and avoids repeated permutations efficiently using the frequency array.
Also runs in O(1) time due to a fixed number of combinations (max 450).
✨ Timelines✨
00:00 - Introduction
0:18 - Motivation
0:43 - Problem Explanation
2:27 - Approach 1 + Dry Run
8:45 - Approach 2 + Dry Run
18:33 - Coding Approach-1
20:42 - Coding Approach-2
#MIK #mik #Mik
#coding #helpajobseeker #easyrecipes #leetcode #leetcodequestionandanswers #leetcodesolution #leetcodedailychallenge #leetcodequestions #leetcodechallenge #hindi #india #coding #helpajobseeker #easyrecipes #leetcode #leetcodequestionandanswers #leetcodesolution #leetcodedailychallenge #leetcodequestions #leetcodechallenge #hindi #india #hindiexplanation #hindiexplained #easyexplaination #interview#interviewtips #interviewpreparation #interview_ds_algo #hinglish #github #design #data #google #video #instagram #facebook #leetcode #computerscience #leetcodesolutions #leetcodequestionandanswers #code #learning #dsalgo #dsa #coding #programming #100daysofcode #developers #techjobs #datastructures #algorithms #webdevelopment #softwareengineering #computerscience #pythoncoding #codinglife #coderlife #javascript #datascience #leetcode #leetcodesolutions #leetcodedailychallenge #codinginterview #interviewprep #technicalinterview #interviewtips #interviewquestions #codingchallenges #interviewready #dsa #hindi #india #hindicoding #hindiprogramming #hindiexplanation #hindidevelopers #hinditech #hindilearning #helpajobseeker #jobseekers #jobsearchtips #careergoals #careerdevelopment #jobhunt #jobinterview #github #designthinking #learningtogether #growthmindset #digitalcontent #techcontent #socialmediagrowth #contentcreation #instagramreels #videomarketing #codestorywithmik #codestorywithmick #codestorywithmikc #codestorywitmik #codestorywthmik #codstorywithmik #codestorywihmik #codestorywithmiik #codeistorywithmik #codestorywithmk #codestorywitmick #codestorymik #codestorwithmik