It has been 2 weeks since the last time I was at Big-O Coding.

I decided to learn at Big-O Coding through my friend’s recommendation. During the past 12 years of going to school, I also went to many extra classes, and also experienced many times the feeling of coming home at 10 p.m. It was an arduous process, but looking back, I feel no regrets.

There are many times when I feel so familiar with tutoring classes and those times are all in the final year of my high school. I stick with these classes because I feel the dedication of the teachers, feel that the teachers care about whether I can get into the school I want or not. And through the words and actions of these teachers, I also learned far beyond knowledge in books. I learned to be responsible for myself, for my studies, and the people around me.

After going to university, I’m not too eager to find teachers or tutoring places like that anymore. I have also gotten used to the distance between students and lecturers in the university environment. Many people tell me that when I come here, the attention of teachers will also decrease because they teach a lot of classes and also have their own research work. And after spending a semester in college, I think this is quite true.

It’s almost true because out of all the teachers I study with, there still are teachers who really care about their students. And they make me feel so lucky to have had the opportunity to study with them including Mr. Tung, TA brothers, and sisters at Big-O Coding center. A class with teaching assistants also is something very special to me. Everyone is very good and dedicated. I still remember when I was stuck at a certain question, Bao TA just saw that. Then he came to my place to solve the problem right away without me having to ask. I still remember the very first day Mr. Tung said: “We are responsible for responding to students’ questions within 15 minutes from the time students post on the Facebook forum”. Right at that moment, I felt like I was in a very special team when everyone was really dedicated to the work that they do.

I got to do very difficult problems at Big-O. These exercises remind me of when I was in high school. I feel the careful selection of Big-O in the exercises as well as the detail in our solution guide.

My most memorable session was the one near the end when Mr. Tung shared his tips for applying to big tech companies like Google, Facebook, and Amazon. That class coincided with the 2nd semester of my university, and like I’ve often told my friends in class lately, I felt a bit disoriented in my studies. After a semester of investing a lot of time in the school, even though I got the expected results, I still feel not very happy. But thanks to this class and with the guidance of Mr. Tung, I have a goal to strive for. Not to get into Google or Facebook, but to try to maintain my serious study attitude in the last semester, because I see the meaning of the courses I have studied. Not just for good grades, or to show off with friends, but it is also knowledge to help me go for job interviews and apply them to other areas of my life later.

It wouldn’t be an exaggeration to say that Big-O really changed my life. I would like to thank Big-O very much and see you all at the Orange course.

Quoc Vinh

Big-O Blue 28

“WHAT CAN YOU DO WHEN YOU CAN NOT EVEN PASS THE ENTRANCE EXAM TO HIGH SCHOOL?”

It’s the reason why I didn’t try my best during my 3 years of high school. I’m doing everything at the middle level and I think that’s enough. The day I received the results of the high school exam, it was like a slap in the face. My Math and Literature marks are both 6.75 out of 10. During my 3 years of high school, I thought that in the future, I just need a normal life, my salary is enough to support myself and my mother thinks the same. Well, no one has faith in me.

I know a few movies about hackers by accident, this is also the reason why I stepped into the information technology industry, perhaps the glitz through the movies makes me feel impressed. In the end, I passed information technology major with average scores.

Right in the first semester, I learned basic programming subjects, perhaps everyone knows it’s not easy for me. The most basic subject of programming is general science and I got a 6.4 at the end of the term. Well, I’m a mid-level all-rounder. I am an average thinker, not gifted.

Time is not a person who has the patience to wait for anyone, until I look back, it has been 18 years of meaningless existence.

I came to know BigO like a charm thanks to a sharing post and I chose it as the last hope. Initially, with a huge amount of knowledge, my head and my brain could not handle it. And my head started to ache. But then, I got better and finally, I could be who I am now. For the first time in 21 years of my life, I live with expectations, perhaps this is the most meaningful thing for me so far. A hopeless person, a lifeless person now has a reason to try harder.

The first course on competitive programming I just completed two days ago. I also have a bit of regret because I didn’t have enough time to complete all the problems perfectly, causing me to miss the shirt in this course. To Mr. Nguyen Xuan Phuc, thank you very much for the lecture. To Kim Phuong Trang, thank you for your confidants, also your sharing. I have more motivation to solve difficult exercises. Also to Nguyen Viet Nam Son and Mr. Son Nguyen who made the course even more interesting, thank you.

Bui Đuc Toan

Big-O CP01

Recently, I attended a programming course at Big-O Coding. To be honest, when I first joined, I felt very shy and confused with my level and was afraid that I would not be able to keep up with the lesson progress. Originally, I had no intention of studying Computer-related subjects from the beginning, but life pushed me into the field of Computer Science. And I realized that I needed to go to a learning center to have a solid knowledge base for my major. That’s when I found out about Big-O Coding through a friend.

After one course, I knew it was the right decision of mine. There are many things I want to share about Big-O and my experience there.

First, about the lecturer, my lecturer is a senior with a very good profile (you will know when you go to school ;)) – Mr. Nguyen Xuan Phuc (I admire you very much). He not only teaches me programming theory but also introduces external readings + practical applications of algorithms. He also organizes a Kahoot game to help me review theory after the lesson. The class became more lively and I can also reinforce the knowledge I have learned.

Next is the team of extremely enthusiastic TAs. I also thank Mr. Hanh, Ms. Tam, and Ms. Du for taking a lot of time to listen and answer the questions I encountered even though it was midnight (sometimes) ?.

Regarding the course content, Big-O arranges lessons logically from easy to difficult, the previous lesson is the foundation for the next lesson, which makes the knowledge not so suffocated. The knowledge of the course is quite wide and is also suitable for a Coding interview. After the course, I was able to solve more problems on Codeforces with higher optimization than before. Going to the exercise part, I did it on the Big-O Coder site. The above exercise system also has a solution guide for students. The solutions are written in 3 different languages ​​C++, Python, Java, so I can freely choose the language that I love.

Why Big-O? As a person who is just a beginner in programming, if I study by myself, I will have a lot of trouble arranging the lesson order properly. Not knowing which algorithm I should learn first and what tips I should apply. Most of all, Big-O also conquered me by its very nature, easy-to-understand “problem-solving thinking”. The most impressive algorithms for me are probably BFS and DFS with maze problems that are both easy and difficult.

If I have the opportunity, I will continue to accompany Big-O on the path of learning algorithms. Finally, thank you to Blue Online class 06 (January 4 – March 15, 2021).

Thai Tai

Big-O Blue Online 06

I’ve known about the center for a long time, but I’m also too lazy to study. So I didn’t have any intentions to come to the center. But thanks to “fate”, one day my FB was flooded with reviews about BigO (actually only 1 or 2 articles), but every word in those articles inspired me to make my decision. I must register to study. Because I feel the dedication with a professional team from BigO. And also because I want to learn more about the algorithm. :3

The course lasts for 2 months with 18 lessons – tuition 7 million. Studying the BigO Blue course is really a great experience for me. I have been able to cultivate more useful knowledge from basic to advanced and consolidate the basic knowledge I have learned at university. But for me, everything is still new because in my youth I played instead of learning. And this is also an opportunity for me to learn a new programming language. Through each lesson, I have 8 “small” challenges to review what I have learned. These challenges not only help me approach some problems related to the topic I have just learned, but also challenge my English. I was too confused to read the questions, not kidding ?. But I don’t need to worry much about it because BigO is always ready to help me. I am supported with 2 very effective help rights: 1 is a super good, super enthusiastic TA team – 2 is a high-tech system that automatically summarizes topics for me. At first, I was very diligent in doing my homework because every time I understood the topic and completed all the problems, and saw my name on the “top trending”, I felt so happy. But everyone will “break” sooner or later. My lazy self is revealed. With only the first 3 – 4 days being diligent, I finished the course with 3/4 of the unfinished assignments ? But I don’t have to worry. On the contrary, I am very reassured because I have signed up for BigO’s lifetime warranty package, so I can come to OH (office hour) to study and be supported by teaching assistants. This is a huge plus point at BigO because it helps me to get rid of my loneliness ?. Also because the teaching assistants are always enthusiastic and actively ask if I have any difficulties. It’s really fun ❤ At the end of the course, teachers and friends held a festival to celebrate for early “future employees of GG, FB, Amazon” ?

I think if you love or simply want to learn about algorithms or for no reason at all, BigO is always an extremely great choice.

I would like to thank Mr. Tung and the TA team. Everyone not only gave me knowledge but also taught me how to “get rich” ? (if anyone wants to know details, please register for the Blue course)

Thank you to my sister, classmate Nguyen Thanh Truc who has always been my motivation and helped me answer “stupid” questions that I didn’t dare to ask in front of the class ? thank you to my brother Bui Chi Dung for sending his wish and dream to give me more motivation.

Thank you to my 2 friends, my beloved teachers, Hoang Thien Nu, Duong Nguyen Thai Bao. Thank you for always being ready to support my stupid questions ?.

Last words, thank you so much, BigO. I hope to have the opportunity to meet BigO again ❤ Hopefully one day I will be confident enough to go out into the world. Hmm enough gossip, now let’s do my homework, there are about 90 questions left ? I also hope this article can inspire other future “students”. Just like me in the past :>

Tran Hao Nam

Big-O Blue

I finished the 2-month algorithm course with BigO Coding – “Learn algorithms with experts” with a lot of knowledge and with many new talented and enthusiastic friends.

First of all, I would like to express my sincere thanks to Mr. Tung and the founders of the center for creating a competitive learning environment for everyone. For anyone who wants to consolidate their knowledge, come to BigO.

Thank you to Nguyen Xuan Phuc, Hoansn, and Long My Du for the knowledge, enthusiastic support, and great motivation. Special thanks to Truong Nguyen Cong Trung for taking a lot of time to explain the parts that I still have problems with and do not understand. Many exchanged messages, video calls with Trung helped me understand the problem thoroughly.

Personally, I always feel lucky because my path of studying or working always meets many talented people who have motivated me to keep trying.

I’ve known BigO for a long time, but I thought I’d really have a chance to learn when BigO officially opened an online class. However, after many delays, I decided to take the Blue Online course 2 months ago.

The first impression of the class was a bit strange. From learning right away without any introduction to tell who you are to everyone. It wasn’t until the last class that we parted that we knew everyone’s faces. The second thing that’s interesting about online classes is how young the instructors are. Because I’m not familiar with the form of programming on competitive programming platforms, at the first problems, I submitted wrongly many times even though it is simple.

Although I already have some basic knowledge of data structures, applying these structures to solving exercises still requires a lot of practice. With selected exercises, the Blue course offers many different perspectives on the same problem so that through solving that problem I better understand the data structures.

Before the course, my knowledge of graphs was quite weak, only basic knowledge of wide and deep browsing. However, after the course, I feel more confident about the graph processing part. That will be the foundation for my further learning in the future.

In addition to the knowledge that I have learned in class, the motivation to work together to climb the class rankings is also something that makes me excited. Everyday checking the rankings to see where we are is also interesting. Summarize after the course, I did 105 exercises in 2 months. Although the target has not been achieved, it is not a bad number. My opinion is that everything is like climbing a mountain, if you try to climb it, even if you can’t reach the top, you will never be at the foot of the mountain again. Let’s keep trying.

Thank you BigO and see you soon!

Tran Đuc Toan

Big-O Blue

Hi everyone, it’s me again. After 2 months of improving my algorithmic skills at the Orange course – BigO Coding – Learning algorithms with experts, I feel really…

First, after trying out at the Blue course, I felt so happy because the lesson was quite easy, so my confidence surged. At that time I heard from my friends that the Orange course was difficult, but I didn’t believe it. Sign up to study with the thought “A few algorithms, learn a little and you’re done”. Who knows…

The very engaging and easy-to-understand lectures delivered by Mr. Tung made me even more interested in applying new knowledge. However, just in the 3rd problem in the first session, I fell so hard and led to a series of days of depression and self-doubt because of a dozen times submitted but still has not passed. Fortunately, thanks to the enthusiastic, caring TAs who always asked if I was still breathing to come to the rescue.

Thanks to those moments, I had the opportunity to look back and feel that I still had many shortcomings. Moreover, I have the opportunity to meet and interact with talented and beautiful seniors Ms. Hoang Thien Nu and Mr. Duong Nguyen Thai Bao.

In short, if you want to challenge yourself to any extent, join the course at Big-O Coding, you will surely learn many useful things. By the way, Big-O has just upgraded its cool, spacious, and luxurious study place. If you are far away but still want to study, online learning is still a very good choice. :>

Khoa Nguyen

Big-O Blue Student

So 4 months of accompanying Big-O (Blue & Orange) has ended, the time is not too long, but what Big-O brings has exceeded my expectations. Sincere thanks to the Big-O team.

For those of you who are completely new to IT, or algorithms, Big-O is a very good choice for you to experience what coding really is (Green course). For those of you who already have basic knowledge of programming, want to learn about algorithms, or have tried self-study but have not been effective, Big-O is also a very good choice. The Big-O Blue course will help you consolidate the foundational knowledge taught in university, and expand some new knowledge. In the Blue course, you will be familiar with the classic algorithms and customize those algorithms to apply to real problems.

And for those of you who already have a pretty solid algorithmic background, Big-O Orange will help you level up your skills a lot. This course focuses on algorithm design more than just re-applying classic algorithms.

At Big-O, you will have the opportunity to:

– Challenge yourself with selected problems from Codeforces, SPOJ, UVA, etc.

– Be supported by the TA team who answer your questions very conscientiously. The TA team is what impressed me the most with Big-O, you guys are very good and your communication skills are very good.

– Join Office Hours (every Sunday) to answer all your questions. And you can still get help from TAs even after the course is over.

Anw, Big-O is a fun experience, no matter what you need the algorithm for (job, promotion, interview, or just plain nagging about it). If you intend to stick with programming, I think algorithms are something worth your investment. The problem-solving skill is really what sets you apart from everyone around you.

Finally, I would like to thank Mr. Pham Nguyen Son Tung and the TA team for accompanying me during the past time. I Hope Big-O will grow more and more in the algorithm community.

Tran Hien

Big-O Student

Personally, learning algorithms for me is not only to be able to go further in the future but also as something to entertain in my spare time. I decided to go to Big O so that I can have a more solid knowledge of algorithms and this is my very right decision.

I would like to thank Mr. Tung and all TA friends for providing useful knowledge as well as answering my questions ❤ Specially THANK YOU to Hoansn for motivation, and fixing bugs for me: ”> ?

Nguyen Van Thang

Big-O Student

Talking about the Orange course, the people who have paid attention to Orange might be all in the “industry”. Because the gap between Blue and Orange in my opinion is quite large. In the Blue course, you only stop at the level of customizing the available algorithm to apply to a problem. Then in the Orange course, the criterion of the course is to learn how to design algorithms, so here your creative thinking will be improved. I once fell into depression because I submitted my solution nearly a dozen times to get accepted. But the feeling when I saw the green accepted after looking at the red “wrong answer” for a long time is really good guys. I decided to continue the Orange course because, in the past, I felt so stupid when I studied Dynamic Programming (DP). I know that following this course, I will definitely meet my old friend, and yes, there are a series of N consecutive sessions to teach you all about this topic ? Fortunately, the curriculum is more detailed than I initially thought.

A brief review of the course’s hype, as I said the course level will probably be more selective in terms of incoming students, people in “industry” should be interested in participating, people outside “industry” who want to challenge themselves as well. I encourage them to participate, but they should go through the Blue course first.

About the TAs support team and lecturers, you can read through my Blue review :3 very good guys. Orange’s TAs still are excellent as they were. In addition, the number of TAs is almost double :3 Because the difficulty of the course is higher than Blue, the TAs’ support is even more enthusiastic.

Another point I really like is that the Big-O team adapts to the epidemic situation very quickly. Online-offline parallel teaching sessions, so those who are far away can stay at home to study remotely. The TAs became hotline customer service staff. All questions sent to Zoom will be answered immediately, no different from studying offline.

Finally, thank you to Pham Nguyen Son Tung and Big-O’s TAs for accompanying me in the practice.

Le D. Han

Big-O Orange

Yo, 2 months with Big-O has ended. Neither short nor long, but full of emotions. Although I am very passionate about math, I am extremely not good at algorithms. When I was a student, I was so stupid. The Big-O Blue course has helped me glean a lot of basic knowledge that was lost in college while learning a new subject, and rekindling my interest. The Blue course is suitable for “people in the industry” or those who have known algorithms. The quality of exercises in a topic will be from easy to difficult. There are only 8 exercises between 2 class sessions but it also consumes a lot of time for me. Sometimes many hard problems make me cry and sit until 1-2 am like when I was doing a project. One more reason that I have to try to finish all the problems is that the background of the students when participating in the course is different, so it is also acceptable for you to have different levels of problem-solving in one problem. Then the TAs support me to solve the 2 most voted problems. And to optimize my benefits, I have to solve and pick the hardest problem on my list, then entice votes. But for 70% of the course, I forgot to vote for my articles ? so I missed the answers. Thank God Big-O has Office Hours (OH) on Sunday, regardless of gender, region, party, all backgrounds, as long as you come and speak the same language – algorithm, then Big-O’s super cute TAs are ready to welcome you as president even if you’re not the president or are fake president ABC XYZ. OH is a big plus at Big-O, not only does it help with the homework you’re studying, it’s ok to take whatever problem you need help with. If one TA can’t help you, there are a dozen TAs ready to help you with your problem. This is the time when the TAs are most active. The students participating in OH are sure to be asked by TAs 1-2 times even though they don’t have any questions to ask. Imagine you are sitting and looking at the problem, there will be a question asking “Are you still breathing?”, oops wrong, “Do you need my help?” ?

Anw, 2 months joining Big-O is an interesting experience, for anyone who needs to learn algorithms for any purpose, work, interview, or simply study because of interest like me.

Highly recommend it for those of you who can’t find your learning path as well as get excited from learning algorithms, or for those who simply review your knowledge for your job. Investing in the algorithm is not wrong and Big-O is definitely the right choice.

Last words, I would like to thank Mr. Pham Nguyen Son Tung and thank the TAs, especially Long My Du for supporting me. I hope Big-O can develop more and more and spread the passion to the community that loves algorithms.

Le D. Han

Big-O Blue

I took the Green class of Big-O Coding, learning algorithmic programming for beginners.

My motivation to go to the center is: I want to learn something new. I have tried many online courses, but I don’t understand why I can’t absorb knowledge. So I signed up for the course, it seems that money makes me more responsible =)).

The teacher and the teaching assistants are all very dedicated. The offline learning place is also close to my school. I studied offline for the first half of the time, then I found the work too difficult to arrange, so I switched to online. In general, I find there is no difference between online and offline in terms of learning quality (if you are not sleepy while studying :)).

The website is full of information about the courses, everyone could go there to learn more about the courses.

Le Kha Han

Big-O Green 18

Today I want to tell you about a story called “BigO Coding”. ?

I’ve been looking forward to posting this status since last night. I hope anyone who reads this will give me 1 share – 1 cmt or simply 1 reaction so that this status won’t disappear.

For me, the past 2 months have been a challenge. I gave up the job I am passionate about to spend time at BigO ? and BigO did not let me down. It all started with a friend’s encouragement after seeing that I spent the first 2 years of university unhappily with “Code”. I thought I would never come out of that obsession ?, but everything has changed since the day I came to BigO ❤️. The truth is, I haven’t missed a single class even though it’s raining, windy, or stormy. After learning a course with Mr. Thanh and the TA team, what I received was not only knowledge but also joy and excitement when I “Code” (BigO raised me so well that I even gained weight ?). Finally, after 2 years, for the first time, I really think about a clearer direction for my future ?. For me, I can’t wait to go back to BigO again, but next time I won’t go empty-handed, next time there will be gifts for everyone?

Quoc Huyy

Big-O Green 17

Before moving to university, I decided to enroll in a programming course at Big-O Coding. From being a Chemistry major student, I gave up chemistry and decided to follow the path of programming. And that decision was confirmed as not wrong when I came to the Green course at Big-O.

The feeling of stress after completing all the exercises helps my brain to become more wrinkled and has the opportunity to compete with seniors in the same industry :)). I program more firmly and get used to Codeforces, Hackerank to practice coding and to improve my thinking.

The result after 2 arduous months is a certificate of graduation with merit :)) and a shirt only for the top excellent students of the course. Thank you TA Ngm Thyy, To Hieu Minh, Anh Nhi, Mr. Quoc Huyy and Mr. HO Tuan Thanh have enthusiastically supported me ❤

Learning algorithms: the more you learn, the more passionate you are!

Quang Nguyen

Big-O Green 17

After entering university, I was quite confused and didn’t know where to start. Deciding to choose Big-O as a place to develop my thinking and improve my problem-solving skills is the best decision. Big-O helped me get closer to my dream. I thank Mr. Thanh, Mr. Toan Doan, To Hieu Minh, Ms. Ngm Thyy, Anh Nhi, and other TAs for always helping me, even though I asked the question when it was very late, I still received the fastest reply. If you want to learn algorithms and improve yourself, go to Big-O.

Trong Tin

Big-O Green 17

2 months immersed in Big-O’s Green course is neither long nor short, but since then I have been able to have a better understanding of programming. I found more joy and passion for my future career. Sincere thanks to Mr. Ho Tuan Thanh (HO Tuan Thanh) for teaching me. Sincere thanks to Thinh (Gau Rau) for helping and guiding me step by step in programming during my time studying at Big-O.

Trung Thanh Le

Big-O Green 15

Personally, I wanted to study algorithms seriously for a long time, but in the end, I only finished the course “Design and Analysis of Algorithms – Part 1” at Coursera: https://www.coursera.org/specializations/algorithms). Learning is very good, but it is also quite time-consuming, because they teach too deeply compared to my needs, for example, an algorithm sort, the teacher demonstrates the algorithm very carefully, up to an hour. In general, the time to focus on theory is very long before jumping into real code, not as short as in Big-O, when I finish learning and then practice as soon as possible.

This is also good because I learned how people prove algorithms, but it is also quite boring. Because there is no sample code. I had to self-study, self-actualization, it also takes more time to do the exercises. For example, for a few simple graphs, I still need to debug many many times. Even for a book, such as “Introduction to Algorithms”, I can only read it for 3 chapters and gave up on the next 1000 pages. 

In general, self-study is hard, and it is easy to get frustrated. I also intend to self-study the algorithm for a long time because I understand its importance, but I keep delaying and looking for something else to learn ? . Unfortunately, during my delay, I was contacted by a few foreign companies for an interview and unfortunately, all failed. So this year, I’m determined to seriously study algorithms, and that’s also motivation.

That’s why I came to BigO. I don’t remember how I found the BigO class on Facebook either, but I feel like this is an opportunity for me. The course opened at the right time for me. At that time, I didn’t think I could do these contests, because I was self-studying, so sometimes I found the lessons were not suitable for my current level. Then I took my first BigO course…

And so far, I feel very satisfied. My knowledge and my problem-solving skills have improved markedly. It is most obvious when comparing the work I did when I first learned and the work I do now. At the end of the year, I have one more chance to interview, so I have to try really hard. Otherwise, I also want to have enough skills to be able to utilize my knowledge of technology to create software that I still dreamed of doing back then.

Tu Hoang Do

Student of Big-O Coding

After 7 to 8 lessons at Big-O, I see that my thinking has improved a lot, I code more firmly than before. Before coming to Big-O, I practiced coding on Codeforces. When I did contests, in general, I had no idea how to solve the problems. I was stuck and sometimes I couldn’t solve any problems. From the day I started learning at Big-O, I don’t understand why when I did the contest, I started to have ideas to do, my thinking improved more than before. I was able to solve problems A and B of div 2 on Codeforces even though I submitted them multi-time to get accepted. In addition, I also self-learn other algorithms, so I successfully interviewed at a company (I would like to remain anonymous). As for Mr. Tung and the teaching assistants, I feel quite enthusiastic. I can ask questions at any time, even though the content is not very relevant to the lesson. As for the opinion about the curriculum: I hope to receive lecture slides before each class so that I can learn first. So in class, I have more time to do exercises.

Hiep Nguyen

Student Big-O Coding

For a beginner like me, the current Big-O is just more than enough. Thanks to Big-O, I was inspired again with computer science and motivated to code. Being in contact with Mr. Tung as well as Mr. Khoi and Mr. Phuc is an opportunity for me to gain experience as motivation. Although there is a particularity in the subject of information that is very difficult to teach like mathematics and physics, I see that Mr. Tung and the teaching assistants have been very supportive to me. Since at school I am the first generation, so there are very few opportunities for me to have a deep understanding of what I have learned. I find that the way of running algorithms by hand in every class is very interesting. In the future, I will try to stick with Big-O for a long time.

Nguyen Hoang Dung

Student at Gia Dinh High school

If only I had been led or taught by Mr. Tung, Mr. Phuc, and Mr. Khoi sooner, my career would have blossomed :)) I am a student in dormitory area B. Every day it took me 20km to go to the center. Sometimes I try hard but I still can’t reach the common ground in the class. I guess I have to put in more effort. I only learned one lesson from Mr. Tung in class and thanks to that session, I followed him on Facebook and came to this class. Thanks to this course, I realized how important algorithms are. Before, I only learned what was taught in class. The score is so good that I don’t know how big the programming world is. Thanks to the course, I know more websites that help me to learn to code more. I really like learning to code, although I’m not good at it now, this course is a motivation for me to change myself. Thank you to Mr. Tung, Mr. Phuc, Mr. Khoi, and the TAs for opening this course. Hopefully, this project will be maintained and developed into many more courses. I will definitely be in the next courses.

Le Huu Nghi

Student at Ho Chi Minh University of Science

The program is very easy to understand, and the class is also very good. If students don’t understand the lesson, they can ask questions and be replied to very quickly. Currently, I have no complaints about the course and am very happy with the course. Because it’s more enjoyable to study with everyone.

Vu Lam Chi Tai

International University – Vietnam National University

Halfway through, I have learned a lot about problem-solving. It can be said that I am more confident when I see algorithm questions. I hope by the end of the course I can improve even more.

Kieu Minh Phu

Freelancer

Only at the beginning, when I was not used to the course, I did not keep up with the progress. In the following sessions, I found that the teacher was very good and enthusiastic, and the teaching assistants were also very supportive. Regarding the lecture, I find the design clear and logical, which helps me to easily grasp the content. The class has a moderate number of students, so there is no situation of not having a seat or not being able to concentrate due to too many people.

In general, everything is really good.

Huynh Minh Phuc

Blue 4

Hello, I am satisfied with the course. The curriculum is detailed. The course has enthusiastic teachers and teaching assistants. However, at this time, I am quite busy, so I could not follow the course well. I hope that after the course I will still be enthusiastically helped by the staff.

Vu Minh Tung

Oracle Developer

Currently, I am very satisfied with Big-O’s course. The program, as well as the exercises, are suitable for me. Mr. Tung and his teaching assistants like Khoi and Phuc supported me very enthusiastically during my learning progress. Thanks to Big-O, I know more websites about algorithms as well as how to think and solve problems.

Vo Xuan Thuan

Ho Chi Minh University of Technology

Well, I think everything is good, but I think Big-O should give students more homework.

Nguyen Duy

Blue 4

I think the course is ok. I am waiting for Mr. Tung to open the Orange course to register :3

The teaching program: very good, helped me approach algorithms more deeply. So now I am more familiar with the usage of each algorithm as well as data structures :3

Textbook: easy to read and understand. I find the most difficult part to understand is the 3 graph algorithms.

The teachers, teaching assistants are dedicated, and very enthusiastic.

Classroom: I think it is great enough to have an air conditioner.

About myself: before studying at Big-O Coding, I also studied by myself, but it was not very effective. After taking this course, from being a bad guy, I feel like my level has improved. My programming skill has been taken to a new level. I also know that algorithms have many interesting applications.

Comments for improvement: provide more homework (3 more exercises are ok) since I find it difficult every time I go online to search for more exercises.

Nguyen Tan Dung

IT – Computer Science Student at Ho Chi Minh University of Technology

Mr.Tung and TAs are very enthusiastic and dedicated to answering my questions. However, the classroom seems a little bit small for moving around. The slides are well-prepared and explained in detail. And we also have sample code in many programming languages, which I found really helpful. However, there’re still some minor flaws that need to be fixed. Above is some of my feedback for the course. Wish Big-O more and more to develop and reach out in the future.

To Đang Khai

Dokter at Ministry of Health and Sports, Myanmar

The last exercises are too hard lol. Many times I gave up on my school exercises just to solve those problems. Because I am afraid to not be able to catch up with the course lol.

At first, I thought that I couldn’t catch up with this course since I had no idea about coding. I only took a few fundamentals classes in my undergraduate. During the learning process, I realized that I have improved myself day by day. And now, my problem-solving skills are maybe a little bit better. I hope Big-O can bring more advanced courses after the Blue course in the future.

Pham Quoc Huy

Student at Hutech University

I’m not a student or in a career related to programming. I signed up for the Green course because I was interested in coding. However, when I studied, I enjoyed it very much, I felt that through the course, I enjoyed coding more. About teacher Thanh, I don’t know what to say. Everything is ok with me. The teacher is friendly, so the class is also comfortable. I especially like having some TAs (teaching assistants), because they are very helpful and nice.

Nguyen Ngoc Nhu Thuy

Student of Green 10.

I found the course very useful, helping me master some basics of programming, helping me in coding and thinking. I will register to study the Blue course when I have more free time in the future. Hope I can learn more.

Nguyen Tien Anh

Student at the Ho Chi Minh University of Science.

Actually, before learning at BigO, I used to read a lot of books about programming such as Competetive programming by Steven Haslim or the books I collected in the library.

Reading is interesting, but to understand the knowledge briefly is almost impossible because there are no exercises or there are exercises but almost no solutions. Reading the code on the internet is not efficient for me. Because I only understand the code to get the problem accepted, but not to think about it myself. When I studied at BigO, I was able to look back on a lot of things I had learned before, but from a different perspective. It’s simpler and easier to understand. And especially the teaching assistants give me a very detailed solution for the homework. They also help me with extra exercises. That is why I find studying at BigO is close and efficient. I hope Big-O can develop more to give more quality knowledge to me and everyone.

Nguyen Vu Khanh huy

Back-end developer at Citynow

I found the course quite good, especially with the support of the enthusiastic teaching assistants. I think this is a course worth taking. As for further comments, I think if about 3 months Big-O Coding organizes an online contest for students who are studying as well as those who have studied at Big-O to compete with each other, it will be great.

Nguyen Anh Tuan

Study Information Technology at Ho Chi Minh University of Science

After completing the Big-O blue course, I feel that I code better, and have a better mindset in solving problems. I also know what an algorithm is, and its applications. Finally, I would like to thank Mr. Tung and his teaching assistants.

Nguyen Phuc Loi

Studied Software Engineering at Ho Chi Minh University of Science

Not learning programming right from the 10th grade is a very regrettable thing in my life although I have no shortage of conditions to do it.

So when I learn about competitive programming, I wonder why the contestants are so talented. Then I started to learn competitive programming online. However, most of the algorithms are very difficult to understand. I don’t know where to start, and then I get frustrated.

Later, I learned the OOP subject of Mr. Tung at school and I really felt that his way of communicating was suitable for my learning. So I went to Big-O, where I learned about data structures, algorithms that are used to compete in the Informatics Olympiad. The knowledge is well-organized by Big-O and the teaching is very detailed and easy to understand for a learner like me.

During the learning process, the teaching assistants were very supportive with a cheerful and welcoming attitude. I thank Mr. Tung, Mr. Phuc, Mr. Khoi, and the TAs for the past two and a half months. I wish Big-O to be more and more perfected and developed.

Duong Thanh Duy

Studied Computer Science at University of Sciences, Ho Chi Minh City, Vietnam

After working for a few years, I have forgotten most of the knowledge about algorithms. After studying the BIG-O Blue course, I have reviewed quite a bit about algorithms. Thank you BIG-O for giving me the opportunity to go back to my student days. This is just the beginning of a long journey and I have to try harder. Thank you, teachers and the teaching assistants for your hard work.

Le Van Hoang

Software engineer at Aswig Solutions Vietnam

Big O is great, the knowledge that the course brings can’t be more helpful. Thank you, Mr. Tung and his teaching assistants!

Ngo Truong Đat

Studied at 대전대학교 Daejeon University

After studying the Blue course, I feel like I have figured out many things. Compared to before, I have improved so much. Please maintain the teaching staff of Blue 13, because they are very enthusiastic.

Nguyen Đo Chi Thao

Student at University of Science

Before joining Big-O, I participated in solving algorithm problems at HackerRank or CodeFight sites. But because I had no background in algorithms, I often had difficulty finding ideas and optimal solutions. I also found more instructions on the net but the description is not detailed. After the course, I have acquired a basic amount of knowledge so that I can learn more on my own. In addition, the slides are very detailed and written in many languages, the teaching is easy to understand. The teaching assistants are very enthusiastic to support me when I have difficulties. I hope Big-O can develop more and more and continue the goal of sharing knowledge about algorithms.

Hoang Cong Lanh

Student of Blue 13

• The teacher’s lectures are good, helping students understand the lesson in class.
• Big-O’s service is very good, from teachers to teaching assistants, and classrooms.
• Help students enthusiastically.

Thank you, Mr. Tung and Big-O so much, for helping me understand what I should do in this industry, and having a direction to find my passion. Best wishes to you and TAs. I hope Big-O can have more good students and develop more and more in the future.

Lê Thanh

Posts and Telecommunications Institute of Technology, Ho Chi Minh City

The knowledge in the Blue course is very good, deep and wide. It takes time to learn more after the course. I will definitely join the next course. Big-O is very good professionally but needs to develop more services (such as facilities, uniforms for teaching assistants, etc.)

Nguyen Thanh Hung

Work at Happy International Hospital

Before taking this course, I had a bit of knowledge about algorithms, but I didn’t know how to apply it to solve problems and had almost no concept of Competitive Programming. Big-O has helped me have a more realistic view of algorithms – they are no longer confusing and dry concepts, but are useful tools to solve real-world problems and are extremely close. Big-O has helped me strengthen my algorithmic thinking that has been applied to solve interesting problems. I would like to thank Mr. Tung and his assistants for their enthusiastic support during my study here.

Nguyen Thi Hong Hien

Student of Blue 12

The teachers and teaching assistants are very dedicated and enthusiastic, always creating the best conditions for their students to practice and improve.

Vo Tan Duy

University of Science

I would like to thank the teachers and the teaching assistants for guiding me on the path of algorithms. In addition to lectures and exercises, what I learned at Big-O is a more viable mindset about getting opportunities at top companies. If possible, I hope Mr. Tung and TAs can share with me some experiences and methods so that from now on I can learn and learn about algorithms effectively. I hope to have an Orange course to study ^^

Nguyen Đac Phuc

Ho Chi Minh City University of Technology

Great :))

I thank the teacher and the teaching assistants very much :v

Not only imparting knowledge in the lesson, but also external and deeper knowledge, and inspiration :v

Huynh Nhu Hung

Ho Chi Minh City University of Technology

1. Facilities are very good.
2. I highly appreciated the method of approaching the problems. We simplify the problem and then analyze the direction clearly. This method is reasonable and stable.
3. The course changed my thinking quite a lot about programming style as well as algorithmic thinking. However, for the review, in my opinion, each code will definitely have shortcomings, so we encourage TA to review the code more carefully because it is certain that every code has problems with variable names or styles.
4. The problem is written in 100% English. I think it is good. I must say thank you because Big-O has provided quite a lot of vocabulary for me, considering the course as a combo of Algorithms and English.
5. The code installation part is also easy to understand because there are 3 types of languages ​​(C++, Java, Python).
6. Another thing besides the knowledge, the classroom is very friendly, it is not stressful like studying in a university. However, when taking the exam at the center, it must be said that it is very stressful.

Pham Phong Hao

Thank you teachers and teaching assistants. Through the course, I have gained useful knowledge and experience. Right before studying, I did a project but my code is not very optimized. Now, I look at the code from a more “glue” perspective and it’s easier to judge which part is cumbersome for the program.

Nguyen Quang Hai

University of Information Technology Ho Chi Minh City

After completing the course, I feel more confident and passionate about learning algorithms. Although I have to drive more than 20km every day to go to the center, the results it brings are truly beyond imagination. Thank you Big-O for helping me, especially Mr. Tung and the TAs team. Hopefully, in the near future, I can accompany the center so that I can discover more interesting things about this programming world.

Le Cong Luan

Student at University of Science

Through the course, I have answered most of the things that I have not understood since I was a student. The course showed me where my level is and how to improve my knowledge.

I wish I could study the course sooner, but I think it’s never too late ?

Luong Cong Thuc

FPT Information System HCM

First of all, I would like to say thank you to my TA and my teacher. Before starting the course, I seem to have lost the basics of programming. However, after the course, I have learned a lot. My questions have been answered and I have all of my problems solved. I have a clearer understanding of programming, and algorithms, which help me to think more logically. I wish I could have known about the courses earlier. Finally, thank you for everything.

Nguyen Cong Son

Student at The University of Science, Ho Chi Minh City

After taking a course at Big-O Coding, I feel extremely satisfied with everything here. Before, I was very afraid of coding, but after completing a course here, I was able to be more confident in programming. First, I want to talk about the teaching program. I find that Big-O’s syllabus is not too focused on the in-depth theory of each programming language like universities teach. Big-O instructors only teach basic theories, and then let the students practice coding. At my university, the lecturers taught me too much about the syntax of conditional statements, loops, and arrays, but when the teacher gave me the assignment, I didn’t have a clear direction on how I would write it. I think Big-O’s teaching method will be more effective than my university method. Because after finishing the lecture, I can program right away. Next, I want to talk about the facilities of Big-O. I think the facilities are very good with full tables and chairs. In addition, Big-O has a very convenient, faster, and more accurate grading system. But I think the room is still a bit dirty, so I think Big-O should clean it up a bit. As for the lecturer, I must say that I am extremely impressed with his teaching style. He has a very witty style along with a very coherent and easy-to-understand way of conveying the lesson. More specifically, he knows how to approach problems so that I can better understand how to apply what I learned to solve the problems. Not only that, but he was also very enthusiastic in answering my questions. There was even a time when I asked him about an exercise in my university, but he still enthusiastically guided me on how to do it even though it was very difficult. Finally, about teaching assistants, I find that teaching assistants are also very enthusiastic. Whenever I am stuck with an exercise or do not understand a part of the lecture, the tutors are very dedicated to guiding me until I can solve the exercise. Not only that, although Big-O only teaches C++, Java, and Python, at my university I have to learn C. There are things that C writes a bit differently from C++, so sometimes I also want to ask TA to write in C like how. I am extremely impressed that even though they are not very familiar with C, they still teach me very carefully and precisely. I found everything about the teaching assistant very impressive, but when they stood in front of the class to correct the exercises, the TAs were still a bit confused in the presentation.

Khuat Huu Anh

Student at the University of Technology, Ho Chi Minh City.

Actually, for me, Green is really the perfect start for learning programming as well as algorithms.

I really like the way Mr. Thanh teaches the course. Because it is very concise and easy to understand. And about the teaching assistants, they are really good and enthusiastic. 

Questions on the Facebook group are also answered quickly and easily. I really hope that one day I will be as good as them.

In addition, every week, there is an Office Hours session so that those who can’t keep up with the class lessons or have other questions to ask can come to discuss. 

Unfortunately, due to busy work, I cannot attend the Office Hours. But I find that this is a very useful and effective activity, I hope BigO will continue to maintain and promote this activity.

Before taking the Green course, I can say that I didn’t know anything about programming at all. But after this course, I find that I have gained a solid foundation of C++ and this is a very important thing. It is important for me to self-study and learns other programming languages.

I hope that the teacher and the teaching assistants can continue to help me in the upcoming Blue course ❤ 

Nguyen Tien Đat

Student at University of Technology, Ho Chi Minh City

By learning the course, I feel more confident about the basic data structures and algorithms. For people who work in a different industry like me, it also helps me think more logically when programming the web. The course is well organized. The teaching assistants have good knowledge. They are enthusiastic and nice. The documents are also prepared in detail. The exercises also have detailed explanations. Overall I am satisfied with this course. If I have a chance, I’ll continue to study the Blue course. But now, I need more time to practice what I’ve learned.

Đoan Quoc Bao

Student of the Green course

I like BigO (both Blue and Orange courses). In the courses, the slides are arranged very logically + the examples cover many cases so it is easy for me to learn.

Phan Thai Duong

Student at University of Science – Orange 2

The course helps me gain more knowledge and foundation of algorithm design thinking. With this knowledge, I think it will be very good for my future self-study and research. Thank you so much, teachers and tutors!

Phung Quoc Viet

Student at University of Science – Orange 2

The course provides me with a solid foundation on topics from which I can self-study and improve, the lecture slides are quite detailed and clearly illustrated. I am delighted that I have learned a lot from the teaching assistants. Besides the knowledge learned in class, I can also learn from the experiences and sharing from the TAs and teachers. I hope Big-O can develop more and be successful with upcoming projects.

Đo Manh Quan

Student at University of Information Technology (UIT) – Orange 2

I am happy because my effort pays off, which helps me to be on the next level.

Nguyen Viet Thanh

Student at University of Information Technology (UIT) – Orange 2

Thank you Big-O. I find the course is very helpful, which helps me to gain more knowledge.

Tran Huu Tin

Android Engineer tại TripGo – Orange 1