Abhishek Saini @abhishekcode42 Twitter profile

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Abhishek Saini

16 days

My best 5 KM run timing is currently 32:49 Putting social accountability on myself by posting it here. I won't tweet anymore until I do a 5 KM run in under 30 minutes. Wish me luck!

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Abhishek Saini

@abhishekcode42

2 months

For folks who don't understand the craziness of it. It's like if Japan beat India in cricket in a test match on Indian pitch.

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Abhishek Saini

@abhishekcode42

1 year

Got India Rank 1 in the Leetcode Weekly Contest today. World Rank 32 out of 25,000+ folks, Was able to solve all 4 problems in 21 minutes. All Problems Intuitions - Problem A - Check the count of set bits for each number. If equal to the given count, add to the answer.

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Abhishek Saini

@abhishekcode42

1 month

Thank you C++

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Abhishek Saini

@abhishekcode42

7 months

Got India Rank 1 in the Leetcode Contest today. World Rank 7 out of 28,000+ folks. Was able to solve all 4 problems in 21 minutes. All Problems Intuitions 🧵

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Abhishek Saini

@abhishekcode42

10 months

Sam Altman ko Microsoft ka call aaya. Sam - Yaar tum DSA bahut poochte ho, main nhi aayunga. Microsoft - To sikh lo DSA. Sam - I don't need you, you need me. Hum kyon badlein apne aap ko. Microsoft - Thik h aa jao, nhi puchenge DSA. Sam - Jitna AI puchoge bta denge, but

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Abhishek Saini

@abhishekcode42

7 months

I have interviewed 50+ Candidates at Google. From my personal experience, below are major things that many folks can improve about how to approach an algorithmic interview. Here is a detailed thread🧵...

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Abhishek Saini

@abhishekcode42

23 days

Ask me anything about Competitive Programming, DSA, or Tech-Life in general. Will try to answer everything that I am able to share and also reasonably confident in. About me - I am an IIT Kgp grad, I worked for 3 years with Tower Research Capital, and then for 3+ years now at

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Abhishek Saini

@abhishekcode42

5 months

Wow!

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Abhishek Saini

@abhishekcode42

11 months

Got India Rank 1 in Codechef Round Today. World Rank 4. Problem Intuitions - Problem Dull Operation - Make the OR as N and XOR as 1. a = N, b = N - 1 will do this. Problem Spooky Sequences - Find connected components. In each connected component, order is fixed except for

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Abhishek Saini

@abhishekcode42

10 months

Got India Rank 1 in the Atcoder Contest Today. World Rank 32. My personal best on Atcoder. Problem Intuitions 🧵

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Abhishek Saini

@abhishekcode42

1 year

This month, I completed my 3 years at Google. I will try to write my learnings and experiences in a detailed tweet thread soon. P.S. I joined Twitter a couple of weeks ago. I intend to regularly share things about software development, data structures, algorithms, etc.

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Abhishek Saini

@abhishekcode42

11 months

Mathematics is one of the most ignored topics in Competitive Programming. I have seen many folks being very weak in this topic. Try CSES maths problems set to test and improve your maths skills. It covers some of the common fundamental techniques. Starting 15 problems is very

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Abhishek Saini

@abhishekcode42

11 months

𝗦𝗶𝗻𝗴𝗹𝗲 𝗗𝗶𝗴𝗶𝘁 𝗪𝗼𝗿𝗹𝗱 𝗥𝗮𝗻𝗸 𝗶𝗻 𝗟𝗲𝗲𝘁𝗰𝗼𝗱𝗲 𝗰𝗼𝗻𝘁𝗲𝘀𝘁 𝘁𝗼𝗱𝗮𝘆. 𝗪𝗼𝗿𝗹𝗱 𝗥𝗮𝗻𝗸 𝟳 𝗼𝘂𝘁 𝗼𝗳 𝟭𝟴,𝟬𝟬𝟬+ 𝗳𝗼𝗹𝗸𝘀. 𝗔𝗜𝗥 𝟮. 𝗪𝗮𝘀 𝗮𝗯𝗹𝗲 𝘁𝗼 𝘀𝗼𝗹𝘃𝗲 𝗮𝗹𝗹 𝗳𝗼𝘂𝗿 𝗾𝘂𝗲𝘀𝘁𝗶𝗼𝗻𝘀 𝗶𝗻 𝟯𝟴 𝗺𝗶𝗻𝘂𝘁𝗲𝘀. The 4th problem was

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Abhishek Saini

@abhishekcode42

6 months

We Indians are funny people. We will boo the hell out of Hardik Pandya for changing the IPL team. But won't care at all when politicians keep switching parties, going back and forth multiple times.

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Abhishek Saini

@abhishekcode42

2 months

Because opponent had never lost a single international match before this, not even one out of 70-80 matches. Won last olympic gold without conceding a point, not even a single freaking point.

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Abhishek Saini

@abhishekcode42

7 months

Me who has used C++ for almost 7 years now for two different companies Tower Research Capital and Google 🤡

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Abhishek Saini

@abhishekcode42

28 days

World Rank 28 out of 33,000+ folks in the Leetcode weekly contest today.

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Abhishek Saini

@abhishekcode42

6 months

I am among the top 0.06% of users globally in Leetcode Contests. This is my recommended strategy beginners can use to start and practice with Leetcode for the purpose of clearing algorithmic interviews. Here is a detailed thread 🧵...

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Abhishek Saini

@abhishekcode42

10 months

Even Sam Altman can get removed and looks like they don't "need" him anymore. Then there is some influencer who says Microsoft "needed" me, I didn't need Microsoft.

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Abhishek Saini

@abhishekcode42

11 months

One of the best set of problems for beginners to practice and improve is this one. Make your sorting and searching section in CSES look like this, you have learnt lots of new things. This problem section covers the most common topics to start with searching and sorting. Unlike

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Abhishek Saini

@abhishekcode42

1 year

I have Master title on the Codefoces with a rating of 2200. According to me, This is the most important thing for starting with competitive programming for beginners. A detailed thread on how to get started with CP 🧵

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Abhishek Saini

@abhishekcode42

6 months

I got India Rank 1 in the last Leetcode contest. Giving contests is super fun and thrilling but a significant chunk of learning happens in the upsolving after the contest. Here is a detailed 🧵on my recommendation on what should be the method to upsolve for maximizing learning

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Abhishek Saini

@abhishekcode42

3 months

Ask me anything about Competitive Programming, DSA, or Tech-Life in general. Will try to answer everything that I am able to share and also reasonably confident in. About me - I am an IIT Kgp grad, I worked for 3 years with Tower Research Capital, and then for 3+ years now at

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Abhishek Saini

@abhishekcode42

1 year

If you struggle with dynamic programming, make your CSES dynamic programming problem section look like this. This problem section covers most of the topics and common techniques. Unlike a few other sections of CSES, most in this section are beginner-friendly. Find the problem

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Abhishek Saini

@abhishekcode42

8 months

Competitive programming is like sex: once in a while it may give practical results like helping in clearing job interviews, but that's not why we do it.

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Abhishek Saini

@abhishekcode42

1 year

Me neither. I have given DSA rounds of - Google - Tower Research Capital - Linkedin - Directi (Medianet) - Intuit When I started learning DSA, there were no such useful channels. So I am gonna give more credit to myself here for never failing one DSA round :D

Striver

@striver_79

1 year

Fun fact: I have never been rejected in a DSA interview yet 😆

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Abhishek Saini

@abhishekcode42

11 months

Reached 2800+ rating in Leetcode contests. In the Top 0.05% of the world. Sharing some tips about performing better in contests - - Think of special cases - edge cases. Let's say a binary string is there and something needs to be calculated on that. Think of a string with all

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Abhishek Saini

@abhishekcode42

1 year

Sharing some super-useful resources for blogs for learning DSA and Competitive Programming. I have learned a lot of things from many of these personally. Here is a 🧵

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Abhishek Saini

@abhishekcode42

1 year

Leetcode Contest 367 India Rank 3 and World Rank 35. All Problems Intuitions - Problem A - Check all pairs of indices, take any pair which satisfies. Problem B - Length is 100 only, count for all substrings and take the smallest one with minimum len. Problem C - Iterate the

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Abhishek Saini

@abhishekcode42

1 month

I strongly feel, Zerodha >> Grow Codeforces UI >> Hackerrank UI Counter-Strike >> Valorant I have talked with multiple 20-year-olds who strongly feel the other way around in all three of those. It's super surprising to me.

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Abhishek Saini

@abhishekcode42

10 months

Programming languages I have used till now with usage. 1. C++ : Tower Research HFT Infra, Google search backend, Competitive Programming 2. Python : Modeling, lots of colab scripting 3. Java : Some frontend 4. SQL : Lots of database querying 5. Javascript : Random chrome

Ayush Yadav

@ayushunleashed

10 months

Programming languages I have used till now, in order of usage. 1. Kotlin : Android 2. C++ : DSA 3. Python : Backend/ AI 4. C# : Unity Gamedev 5. Javascript : Creative Coding 6. Java : Android, CC 7. Dart : 1 App for task 8. Go: Learning currently QT with yours

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Abhishek Saini

@abhishekcode42

4 months

Whenever I marry and have kids, the top two things I am gonna teach my kids are maths and lifting weights.

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Abhishek Saini

@abhishekcode42

6 months

Should I make an educational playlist explaining string algorithms? I am thinking to use CSES problems to explain the algorithms and can be recommended for folks to practice as well.

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Abhishek Saini

@abhishekcode42

6 months

I have had to read lots of completely new codebases in the past as part of my professional work for different SWE jobs at Google, Tower Research Capital, Intuit, and for personal curiosity/work. Sharing my mental model of how one can approach a large unknown codebase 🧵

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Abhishek Saini

@abhishekcode42

11 months

I have 2700+ contest rating in Leetcode contests. I am amongst the top 0.07% of users. My recommendation on how beginners can start with practicing leetcode - - Start with easy-difficulty problems in the beginning. - If you are able to solve most of the easy-difficulty problems

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Abhishek Saini

@abhishekcode42

3 months

It's funny how parents think the solution to every problem is waking up at 5 am. and going for a morning walk. They aren't wrong.

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Abhishek Saini

@abhishekcode42

9 months

She had too much negativity, Dijkstra didn't work with negative edges.

Pranav Mailarpawar

@pranavthedev_

9 months

DSA this, DSA that, bro have you even used Dijkstra to find the shortest part to her heart?

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Abhishek Saini

@abhishekcode42

6 months

Reached my highest Atcoder rating till now. I am now Yellow on Atcoder. For reference of folks unknown to competitive programming, there are total of only 30 such people in India.

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Abhishek Saini

@abhishekcode42

3 months

10KM Race ✅️ It was my second 10K, completed in 1:08:00, 6 minutes better than the first one.

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Abhishek Saini

@abhishekcode42

1 year

Frequently used bitwise operation tricks for competitive programming - A detailed 🧵

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Abhishek Saini

@abhishekcode42

4 months

Hard to swallow pill - Most folks who say they want to improve DSA/CP/problem solving, need to learn/re-learn basic maths first, that's their bottleneck.

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Abhishek Saini

@abhishekcode42

9 months

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Abhishek Saini

@abhishekcode42

1 year

I have 6 years of working experience now. 3 years at Google and previously similar time at Tower Research Capital. One very counter-intuitive thing I have learned with experience is, being fully responsible for getting something done at work isn't a burden, it's your leverage.

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Abhishek Saini

@abhishekcode42

4 months

For lot of folks, DSA will improve automatically if they can learn high school maths and logic properly.

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Abhishek Saini

@abhishekcode42

11 months

If you're in college and tech, try multiple things DSA, Dev, CP, ML, Web Dev, etc. College time is too early to fix your domain, it's the perfect time for exploration.

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Abhishek Saini

@abhishekcode42

1 year

Top 10 must-do DSA questions for cracking Google interview A detailed🧵

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Abhishek Saini

@abhishekcode42

6 months

Receiving a new competitive programming T-shirt is 🥰

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Abhishek Saini

@abhishekcode42

1 year

𝗔𝗰𝗰𝗼𝗿𝗱𝗶𝗻𝗴 𝘁𝗼 𝗺𝗲, 𝘁𝗵𝗶𝘀 𝗶𝘀 𝘁𝗵𝗲 𝗺𝗼𝘀𝘁 𝗶𝗺𝗽𝗼𝗿𝘁𝗮𝗻𝘁 𝘁𝗶𝗽 𝗳𝗼𝗿 𝗶𝗺𝗽𝗿𝗼𝘃𝗶𝗻𝗴 𝗰𝗼𝗺𝗽𝗲𝘁𝗶𝘁𝗶𝘃𝗲 𝗽𝗿𝗼𝗴𝗿𝗮𝗺𝗺𝗶𝗻𝗴 𝘀𝗸𝗶𝗹𝗹𝘀. 𝗨𝗽𝘀𝗼𝗹𝘃𝗶𝗻𝗴. Giving regular contests is very useful for practice. But the main learning happens in

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Abhishek Saini

@abhishekcode42

9 months

All India Rank 2 in Leetcode Contest today. Problem A - Find the rectangle with the largest diagonal and return the area of it. General tip for such problems, no need to do square root or anything similar, we are comparing so finding the exact diagonal isn't important, only the

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Abhishek Saini

@abhishekcode42

8 months

I am planning to make a detailed video on how to improve problem solving skills. This will cover both general DSA solving skills and some specific competitive programming advice too. I already have things like how to structure practice to improve skills efficiently, etc in my

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Abhishek Saini

@abhishekcode42

28 days

People who hate on competitive programming all year, today - Gennady Korotkevich reached a rating of 4000 on Codeforces, what a great achievement.

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Abhishek Saini

@abhishekcode42

6 months

Green - The color Competitive Programmers like the most :) Happy Holi Everyone!

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Abhishek Saini

@abhishekcode42

4 months

Praggnanandhaa just beat Magnus Carlsen in a classical chess game for the first time ever. Well done Pragg! You made India Proud. Not sure how many folks realize this but beating Magnus in a classical game is a much much bigger deal than any of the previous times Pragg beat

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Abhishek Saini

@abhishekcode42

1 year

I switched to Google in 2020. My LeetCode graph for 2020 can tell you the exact time when I started preparing and when I got the Google offer :D

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Abhishek Saini

@abhishekcode42

7 months

She - What's your biggest fear? Me -

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Abhishek Saini

@abhishekcode42

2 months

If you hang out with 3 intelligent people, you'll be the 4th. If you hang out with 3 millionaires, you'll be the 4th. If you hang out with 3 fitness freaks, you'll be the 4th. If you hang out with 3 idiots, you'll be the one doing DSA vs Dev.

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Abhishek Saini

@abhishekcode42

1 year

Leetcode Codeforces

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Abhishek Saini

@abhishekcode42

10 months

@anishgiri Tldr: Carlsen to pay 10K Euros fine :(

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Abhishek Saini

@abhishekcode42

9 months

Context in reply

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Abhishek Saini

@abhishekcode42

6 months

and people ask me, you're a senior swe at google, why do you still do competitive programming? competing for fun folks, for fun.

tomato🍅

@neembu_paani31

6 months

Chinese table tennis player Ma Lin, Olympic champion of Men's single, has a world rank of 94 on leetcode. His back-up is the goal of many of us. Hats off to Sports & coding culture of China

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Abhishek Saini

@abhishekcode42

1 year

If you want to improve on any topic, your CSES problem set should look like this for that particular topic.

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Abhishek Saini

@abhishekcode42

4 months

Tips for interns for the internship period 🧵 Personally, I interned at Intuit during my college time. I got the PPO. I couldn't join there though because of different factors, I chose to join Tower Research Capital after college. My suggestions for the internship period -

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Abhishek Saini

@abhishekcode42

1 year

I actually want to teach advanced/hard algorithmic topics too to folks like centroid node decomposition, heavy light decomposition, fractional cascading, wavelet tree, etc. But I have my doubts about the audience of such topics - how many people will be interested in these.

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Abhishek Saini

@abhishekcode42

1 year

"I have solved 100/200 questions on Leetcode, still I am not improving" This is one of the questions that I receive many times from folks. I understand the 𝘯𝘶𝘮𝘣𝘦𝘳 𝘰𝘧 𝘱𝘳𝘰𝘣𝘭𝘦𝘮𝘴 𝘴𝘰𝘭𝘷𝘦𝘥 is an objective and a very convenient metric, but it's not a good one.

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Abhishek Saini

@abhishekcode42

11 months

Advanced C++ Tip From C++20, there is now a new operator Three-way comparison operator. It's denoted by <=> Because of its symbol, it's also called spaceship operator. Given (a, b) It returns < 0 if a < b = 0 if a == b > 0 if a > b One major benefit of this operator is now

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Abhishek Saini

@abhishekcode42

11 months

Facebook-Meta Hacker Cup - I Qualified for round 3. Total 28 folks qualified from India. Problem Intuitions - Problem A1: Ready, Go (Part 1) - Consider this as a graph. Make components of nodes having White stones. Then create edges between these components and empty places. Now

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Abhishek Saini

@abhishekcode42

5 months

Reason to do Competitive Programming Cracking Interviews ❌ It's super interesting and fun ✅

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Abhishek Saini

@abhishekcode42

11 months

Classic set to practice all standard algorithms of graph theory. It starts from really basic ones and goes till really super hard ones. If you're a beginner you can try the first half as after that problems are reasonably tough. For folks with decent skill levels, all problems

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Abhishek Saini

@abhishekcode42

2 months

Me as a newbie seeing other people use C++ template in competitive programming contests.

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Abhishek Saini

@abhishekcode42

1 year

Helpful tips for DSA and CP beginners - Detailed🧵 for clearing some frequently asked confusions related to how to learn and what matters and why -

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Abhishek Saini

@abhishekcode42

11 months

Sharing my solutions for the complete CSES Tree Algorithms section. It covers most of the common tree concepts like finding diameter etc. and relatively difficult but standard concepts like finding a centroid too. Find the link to solutions in the reply.

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Abhishek Saini

@abhishekcode42

1 year

Advanced bitwise operation tricks for competitive programming - A detailed 🧵

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Abhishek Saini

@abhishekcode42

1 year

Codeforces Round 883 Div.3 - Overall good contest for me. AIR 8. Let's discuss how did it go for you All Problems A-G Intuitions 🧵 Problem A - Need to cut all the ropes which are shorter than the height their nail is at. Problem B - Classic Tic Tac Toe, check for all three

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Abhishek Saini

@abhishekcode42

11 months

Happy Diwali Folks! It's been great fun interacting with everyone here in the past few months. I'm glad to see 9,789 folks are finding my posts useful. Let's see if it gets to 10k today on Diwali.

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Abhishek Saini

@abhishekcode42

11 months

Five star coder on HackerRank

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Abhishek Saini

@abhishekcode42

7 months

A very popular post Source - Trust me bro

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Abhishek Saini

@abhishekcode42

1 month

Gave 1000 Rs. to my cook to buy a gift for his daughter's birthday. He was so happy by the unexpectedness of it. Best 1k ever spent.

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Abhishek Saini

@abhishekcode42

1 year

Codeforces Round 898 All Problems Intuitions - Problem A - If all three positions are wrong, then we can't fix them. Otherwise, we can always fix it. Problem B - Only 10 numbers, check for all cases by increasing each by one at a time. Problem C - You can find points of a

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Abhishek Saini

@abhishekcode42

11 months

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Abhishek Saini

@abhishekcode42

4 months

Frequently used bitwise operation tricks for competitive programming - A detailed 🧵

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Abhishek Saini

@abhishekcode42

6 months

Sounds Reasonable

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Abhishek Saini

@abhishekcode42

6 months

Collection of T-shirts won in competitive Programming competitions. This is the subset I could easily find :D Most of these are from college time. Many of these are in wrapper because I had multiple copies of the same ones, so some of these never got out :D Ask me anything

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Abhishek Saini

@abhishekcode42

7 months

It's a hard pill to swallow. But if you're stuck in 1000-1200 range in codeforces after doing regularly for a few months, it's very likely that your fundamental math and logic building are very weak. It's not about competitive programming. You need to work on those things.

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Abhishek Saini

@abhishekcode42

7 months

Hard to swallow pill - Having solved 500 DSA problems means nothing. It in itself doesn't tell anything about your problem skills. It's the same as saying I have covered 500kms. That doesn't tell anything about your running capability. How did you solve those problems, how

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Abhishek Saini

@abhishekcode42

6 months

If you struggle with dynamic programming, make your CSES dynamic programming problem section look like this. This problem section covers most of the topics and common techniques. Unlike a few other sections of CSES, most in this section are beginner-friendly. Find the problem

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Abhishek Saini

@abhishekcode42

9 months

Some of my Personal Goals for 2024 - Bring body fat % < 20 from ~24% at present. - Learn basic music theory and a decent level of Guitar. - Make > 10 videos simplifying a hard algorithmic topic. - Play less chess, especially blitz. - Play more badminton, improve smashes. Will

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Abhishek Saini

@abhishekcode42

1 year

The more fundamental your understanding of a concept is, the more type of problems you can solve using that. Let's say you know binary search. If your mental model is - Whenever the array is sorted, I can use binary search to find the target element. That is one kind of common

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Abhishek Saini

@abhishekcode42

30 days

Ankur Warikoo's whole Youtube channel is basically 5th grade math for adults. These videos being so popular tells us how bad the average population is in elementary math.

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Abhishek Saini

@abhishekcode42

1 year

Codechef Round 101 - Div.1 Overall Good contest for me. AIR 2. Was able to solve all 5 problems. All Problems Intuitions - Problem Warrior Chef - If we choose value as X, then that means all the values greater than that will have to be reduced from our strength. So iterate in

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Abhishek Saini

@abhishekcode42

8 months

There are two phases of a Competitive Programmer. - I am such a genius. - I am really stupid. There is no in-between. One keeps oscillating between these two from time to time. Sometimes both stages can occur within a span of a few seconds in both possible orders of

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Abhishek Saini

@abhishekcode42

1 month

The theory of computation's best book is here LFG!

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Abhishek Saini

@abhishekcode42

6 months

In competitive programming, being an "expert" is just the beginning.

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Abhishek Saini

@abhishekcode42

8 months

I am 2200 rated on Codeforces, which most people would say is a decent rating. Still, when I am making a video on an algorithmic topic, I am so cautious that I don't teach anything wrong by mistake. I often try to proofread the video after making. On the other hand, I see many

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Abhishek Saini

@abhishekcode42

7 months

Do you understand the Dijkstra algorithm? Let's test it.

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Abhishek Saini

@abhishekcode42

1 year

Codeforces Round 888 All Problems Intuitions - Problem A - Check if the difference of height is more than 0 and a multiple of K which is less than m. Problem B - Sort all odd numbers and all even numbers in their positions. Check if the whole array is sorted now. Problem C -

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