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The Change Making Problem - Fewest Coins To Make Change Dynamic Programming

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Table of Contents:brbrMe Talking (Uninteresting) 0:00 - 0:19brThe Problem Introduction 0:19 - 1:48brTop Down Recursion Walkthrough 1:48 - 7:43brBottom Up Iterative Walkthrough 7:43 - 20:18brTime Complexity 20:18 - 21:42brSpace Complexity 21:42 - 22:19brWrap Up 22:19 - 22:52brbrThe code for this problem is in the description Comment from : Back To Back SWE

Bro you're a god at teaching Comment from : Abhishek Moramganti

best video, TQ Comment from : AliN

Best explanation on this problem! Comment from : Ayodeji Marquis

My professor posted a 5 minute lecture on this topic So relieved to find something more detailed Comment from : eggfishy

you're very passionate about this I appreciate your enthusiasm! Comment from : Fernando Rodriguez

How about if the number we are trying to reach is too high? I guess the processing would be too much to get to the result Is there a more efficient way if the user have to provide the final amount to reach, and that amount could be a million dollars for example Going through all the posibilities would be a lot for the cpu Comment from : Codo a Codo Inicial

حبيتك Comment from : Dipper

Explained well!!!!!!!! Comment from : Jaydeep Vasoya

Thank you so much Comment from : Sebastian Casanova

Thank you for iterate, it is much easier to understand Comment from : Octo

Keep up the good work No words to this awesome work!! We need more teachers like u 🙏 Comment from : Urussah Elaheebocus

Huge huge helpbrbrThanks! Comment from : Isaac Green

Thanks for your video I searched many tutorial but i can't understand this problem until watch this video Comment from : Sỹ Dũng Lê

This was hands down the best explanation I’ve seen on this problem Comment from : edonis2787

👍 Comment from : Ankit Singh

my god thank you for actually going through the whole thing i didn't actually grasp the bottom up approach until you hit 3 or 4 most teachers would've stopped at 2 and said "you get the pattern"brbrgreat teacher Comment from : sovi

I usually don't comment on YT videos, but must say very good job on the explanation! Comment from : angelo0dreams

Great explanation👏👏 Comment from : Alie Eldeen Ahmed

I was confused at first when looking at the array but going through the problem helped a lot Thanks for the great explanation Comment from : Tony Nguyen

OMG this is the best video I've ever watched for dp!! So clear and detailed!! Thank you bro!! Comment from : Zhiqian Zhang

This man is his own debugger Comment from : yamaan93

Hmmm what if we also want the combination of coins that can be used?? Comment from : Pranav Nyavanandi

Also, we can further improve the solution by sorting the input array and breaking whenever the coin value is greater than i Comment from : Study account

I was having a mid life crisis while trying to solve this problem I have my amazon test soon Thanks man can't thank you enough Comment from : Study account

Is it hard to implement limited supply of coins into this solution? Comment from : Tautvydas Lukaševičius

Thank you so much!brGreat explanation!!brConcise and informative ❤❤ Comment from : Faris Abuali

hahaha Comment from : FitWithShamas

Heavily edited video, why do you have these weird pauses? Comment from : rafamusic2020 check

very clear, thank you very much! Comment from : 陳冠廷

best explanation i got for this question from this videothankyou very much keep it up Comment from : Rajat Pal

Wowit finally clicked!!! THANK YOU! Comment from : The We Guy

Legend Comment from : Stas the Sauce

How would u convert a minimum coin problem into a maximum coin problem? I have heard its am unbounded knapsack but having trouble implementing it Comment from : Jose Renteria

Amazing solution! Paused the video in the middle and implemented it; got AC Comment from : Kunal Dubey

Thanks for the explanation!! May I know is it good to use recursive algorithm in programming? Comment from : Jerry Chiu

People like me really need his repeating Hope you all the best Algorithm blesses you Comment from : Scarlett Z

What was that @1:26 lol Comment from : Asmit Basu

Subscribed This is better than any teaching I've had from any of the video lectures at university Love your exhaustive approach The repetition really helps get the idea through! Comment from : __dark_channel__

Thank you so much bro I was having trouble with this but you explained it very well I understand it now Comment from : Liam The Great

Thanks Comment from : Sahil Anand

you helped me understand dynamic programming thank you Comment from : Simona Nikolova

Dil se thank u brother this video helped me a lottttbrLove from India Comment from : Shivani Gupta

Bro ur saving my life Comment from : dpadofficial

Shit bro I'm only a minute in and I've never been so motivated Your voice is energetic Comment from : Pranaw Bajracharya

Thanks for the explanation man, really helped me understand this problem Comment from : Jean Lu

Man, your explanation is so good! Thanks for making this video! Comment from : Eric Dai

This boy goat Comment from : chahalpawanpreet

Great video; I only have one question: Once you've determined the minium number of coins, how do you go back and list WHICH coins were used in the optimal solution?? Comment from : Ken Haley

What a legend! Comment from : Karthik

Great video again But what's the point in trolling Tushar in between Unless you guys are friends, there's absolutely no reason to do that Comment from : Rajesh Kumar

Great video! Comment from : Pablo Rojas

So many words Jesus Christ Comment from : darth vàdar

Thank you so much, you're the best, you made it so easy to understand while many others use unnecessarily confusing denominations Now everything makes sense! Comment from : Claire Boitet

you're amazing! best explanation I've found Comment from : J Evans

Fantastic, dude You made me understand the code even without writing a single line Thank you Comment from : Allan Magalhães

wait why did he cut to the Indian guy saying dynamic programming? Is it supposed to be funny bc he has an accent or? Comment from : winterfox x

You are amazing bro thank you ❤❤❤❤❤ Comment from : Ahmed Shamaa

Does this strategy apply for lowest rolls in chutes and ladders? Comment from : Geraldo Macias

this was amazingly helpful, thank you! Comment from : hipsterhp

Yer a wizard :) Comment from : Shrey Patel

Really nice!! Thanks for you effort to make us understand brIf there were a programming for video editing , you could have used many of your speeches recursively 😂😂 Comment from : Syed

Easily the best DP explanation on youtube Bless you brother Comment from : Danish Fayaz

that salt emoji was great lol i love it Comment from : extremelyhappysimmer

Why wouldn't you use BFS if you want to find the shortest depth from the top You don't need to go to the extreme end of any leg of DFS when you could use BFS and tranverse level by level and reach the most optimal ( fewest) ans Comment from : Mayank Malik

Super helpful! I'm a newbie to Competitive Programming and DP has been a difficult algorithm type for me to learn This video helped me understand DP better and I like the bottom-up approach explanation a lot! Keep doing these videos, they're interesting! 🦾 Comment from : Random Guy

Aaah perrillo traes la de paypal Comment from : Eduardo Uriegas

I dont usually comment but gotta say THANK YOU on this one Was struggling to comprehend the mechanics of this algo Your illustration made it crystal clear :) Comment from : Kamran Jafri

Thank you sir! Your explanations are incredible! Comment from : zivash nivash

Any reason you opted to use an array vs table? Trying to compare this to the “knapsack 0/1” and the “unique ways to make change” problems which leverage a table Seems the subproblems are somewhat similar I guess one reason is to not store more subproblems than we have to for space complexity? Comment from : John Pepino

Awesome Comment from : SystemForge

Congrats on the shirt xD Comment from : Michael Fulton

super brother great work Comment from : X-X

your accent is very clear Comment from : Việt Trương Quốc

I am confused about the base cases In this problem you say "no matter what coins you choose, the answer is 0" But in unique ways to make change problem, you say "no matter what coins you choose, the answer is 1" Please explain the distinction between these two scenarios Comment from : pavan gopal

he is great Comment from : Ashish Rawat

This guy is so good at explaining problems I bet kids can understand this too Comment from : Dat Le

You are the Bestttt!!! Comment from : kunal chandra

Hands down best video on the subject Thank you Comment from : Tenshii

Dude this is legit the best video i have found by far on DP Comment from : Oqant0

the best ! Comment from : Chandran V V

Omg :P Love the part you have included tushar roy lol Comment from : Lizzie Daffofil

Thanks for the nice explanation, I think it could be better if you could follow the matrix version of it since we can track of all changes about the Amount and the Currencies Comment from : Soheil Sepahyar

you deserve my professor's salary Comment from : Pedro Leyria

This video is definitely best one for problems based on coin change How to convert 2D DP in 1D DP is amazing Comment from : theWrongCode

excellent Comment from : Huy Hoàng Lê

Awesome explanation! Thank you so much! Comment from : warner cooler

I think maybe just go 04 or 5 in details is enough instead of 012 Comment from : Lee Jsom

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