150 pattern-wise problems with test cases - no card, no catch

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Your ultimate preparation hubat Architect level.

A fully integrated path to placements - DSA, Dev + AI Engineering, System Design, projects and interview prep, on one platform.

What are you preparing for?

How far do you want to go?

Four steps.One staircase.

Start free and climb only as high as you need.

70K+ Followers

Prince Singh on LinkedIn

10K+ Subscribers

@princesinghcse

The community

0+

Engineers learning with Prince Singh

From YouTube to LinkedIn, a growing community learning DSA, AI Engineering and DevOps - from free sheets to 1:1 mentorship with a practising AI Architect.

Full-Time Personalized Mentorship

A course gives you content.FTM gives you a system.

A course ends when the videos end. FTM ends when you get placed.

Any course 0

vs

FTM 6

  • Built around your case

    One fixed syllabus - same for 10,000 students

  • Sprint-based, week by week

    A playlist of videos - no plan, no deadlines

  • Unblocked in real time

    Stuck? Post in a forum and wait for days

  • Weekend review + mock

    No one ever checks what you actually did

  • Full stack of skills

    One topic in isolation - no sequence, no strategy

  • Outcome, not videos

    A certificate PDF nobody ever asks for

Every FTM week

Mon
Tue
Wed
Thu
Fri
Sat
Sun

Any day: Get unblocked. Hit a wall? Connect with me and get past it fast - no days lost stuck on one thing.

  • Mon-Fri

    Execute the sprint. Work through the phase & sprint-wise tasks I assigned, with the exact resources. Ship every day.

  • Saturday

    Review + Mock Interview. We go over the full week - what got done, what didn't, what blocked you - then a mock interview on the week's topics.

  • Sunday

    Analyse + Re-plan. Full-week progress + interview analysis. Based on it, I plan your next sprint. Every cycle is tuned to your reality.

Prince Singh - AI Architect & Mentor AI Architect Founding Engineer
100K+
Community
40K+
Sessions
4.98/5
Rating

The man behind it

Tier 3 college.10+ remote jobs. AI Architect.

Hey! I'm Prince Singh. I came from a Tier 3 college with no senior, no network, no roadmap. Just raw hunger to figure it out.

I cracked 10+ remote SDE jobs not because I was the smartest in the room, but because I built the right systems, followed the right patterns, and never stopped shipping.

Today I build production AI systems - LLMs, RAG pipelines, multi-agent architectures - at a Founding Engineer level. And I teach everything I know on Preparation Street.

1,00,000+ engineers are already on this journey. Come build with us.

@princesinghcse@princesinghcse 10K+ subscribers
Prince SinghPrince Singh 70K+ followers

In their words

0+

learners and growing every day

Hustlers who turned aroundtheir careers and became coders

1,200+

Engineers Mentored through FTM

4.98/5

A

Anand

Prince is a wonderful person. He listened to all my requirements very carefully without any interrupt. He then suggested a career option which was most relevant to my current situation, closest to reality. He is one gem and he is the best if you want either career or technical guidance

mentorship/Guidance

SU

Sourav Upadhyay

The mentorship session really helped me gain clarity on my path. I not only got answers to my doubts but also understood how to properly use available resources and start working on meaningful projects in Python and AI/ML. What I appreciated the most was how patiently the mentor guided me through the parts where I used to get stuck while following tutorials. It was a very motivating and direction-setting experience for me. Thank you for this amazing mentorship Prince Bhaiya ❤️🙏🙇

mentorship/Guidance

AG

Aman Goyal

Great Session, It looked like he wanted to help me out and not just end the session after 30 mins. If you want a clear Idea on How to improve in DSA or How to become a better SWE then I highly recommend Prince.

mentorship/Guidance

NB

NAGEN BISWAL

Prince is an exceptional mentor and a highly skilled engineer. His deep clarity across various fields sets him apart, and he has cleared all my questions. He not only addressed all my doubts but also provided insightful suggestions and practical solutions that exceeded my expectations. His guidance has been truly valuable. If you’re looking for a knowledgeable mentor who offers real, hands-on learning experiences, I highly recommend booking a session with Prince on Topmate. You won’t be disappointed!

mentorship/Guidance

AK

Anshu Kushwaha

I totally agree with this sheet; it's really very helpful. When I started DSA, problem-solving was tough for me, but after going through this sheet, my confidence grew, and my problem-solving skills improved significantly. Thank you so much, bhaiya! ❤️✨

Programming Street - 150

HA

Hamzah Ali

This is a life-changing resource! I started DSA thanks to Prince, and I've been consistent for two months now. The guidance has been invaluable. I'm now looking forward to making a switch to development roles. Thank you for everything, bhaiya!

Programming Street - 150

RJ

Rishabh Jain

This sheet is a game-changer for beginners. It helped me improve my logical thinking, and I was able to solve problems more confidently. The explanations are clear, and the resources provided are top-notch. Keep up the great work!

Programming Street - 150

AK

Abhishek Kumar

The 150-sheet DSA guide was amazing! It really boosted my problem-solving approach. College teaches advanced concepts like 3D arrays, but this guide helped me get the basics right. Thanks a ton, bhaiya!

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MK

Mohd Kamran

This resource is extremely helpful, especially for students from non-CS backgrounds like me. It's a perfect starter pack before diving into advanced DSA topics. I'm eagerly waiting for more DSA content like this. Thank you, Prince!

Programming Street - 150

M

Muzammil

He is clear and very very friendly, gave me a clear path. After talking to him, I think I am in right path with few modifications. Hope to see you soon prince. Highly recommend..!

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RS

RITIKA SEHGAL

This Topmate mentor is truly exceptional! Prince made me feel comfortable, thoroughly understood where I lacked in DSA preparation, and offered invaluable advice on landing a job. His sense of humor and inspiring journey as a recent 2024 Tier 3 graduate make him incredibly relatable and motivating. I've met several mentors before, but none understood me as well as he did. He boosted my confidence and provided practical strategies. Highly recommended for anyone seeking genuine guidance and support. Just go for his mentorship; you won't regret it!

mentorship/Guidance

TU

Tushar Uthane

Spent best time, most informative 20mins of my life amazing guidance got a clear path for my future.

mentorship/Guidance

PV

Prince Verma

Prince bhaiya give me clarity about my future in a very kind and friendly way he is just like a big bro...big bro from another mother

mentorship/Guidance

RT

Rahul Thakur

It was a great conversation with Prince. He has given me a clear understanding of my query and a clear roadmap for DSA, including where I should star. His answers were straightforward. I would love to connect again with some progress. He also reviewed my resume and suggested some amendments in resume. Thanks Prince

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DR

Darshan R

He treated me as a friend and guided me towards my goal step by step. Cleared my doubts regarding placements with at most patience. Such a great mentor to present and future developers. Thank you bhaiya/sir

mentorship/Guidance

JP

John Paul

I just listened to what I needed to hear & it helped. As a troubled IT professional, Prince made me realize that it's okay for things to go wrong & good things take time. He also assisted me in guiding through remote jobs & how I should focus on improving my skills.

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S

Shashaank

Big thanks to you brother for offering free DSA resources! Their help has been invaluable in clarifying concepts and improving my skills. Highly recommended!

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SM

Suraj Maurya

Even if it cost 10000, it’s worth more than that.

mentorship/Guidance

AD

Ankan Das

Bhaiya gave his number and asked me to feel free to message him. He is generous and helpful.

mentorship/Guidance

SS

Satyam Singh

You're such an amazing person. You understand and guide me in such a way that I can't forget for my whole life. Just one more thing... Thank you from the bottom of my heart 🙏❤️

mentorship/Guidance

BK

Bheesha Kumari

He has a very different way of mentoring than most people, guiding in a very realistic manner considering your situation. Very helpful and insightful session!

mentorship/Guidance

AK

Ashes Khan

He understands your points deeply and gives you valuable feedback, also guiding you properly on what to do at this phase. His guidance is really helpful.

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SK

Shipra Kushwaha

He is very friendly😄, the way he explains every minute detail is amazing. I am very glad that I joined the session. He gives his precious time without taking any money, huge respect to you Prince!

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RD

Ruchika Das

It was a wonderful session. I was able to ask all the queries I had. All the doubts that I was having were cleared. I'm truly thankful for all the advice, and I believe it will help me a lot in my work. Thank you so much for the guidance, and wishing you all the best.

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FA

Farhan Ali

The meeting was outstanding and insightful. I appreciated his friendly demeanor and how he understood my questions, addressing them according to my needs. It was truly helpful and preferable for me.

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AK

Anshu kushwaha

I totally agree with this sheet its really very helpful bhaiya. 🙌🏻 Jab main DSA start kra tha to bahoot mushkil ho rhi thi problem solving me and after that jab maine sheet kra then confidence level ke saath saath av meri probelm solving bhi improve ho rhi h. Thanks a lot bade bhaiya ❤️✨

Programming Street - 150

HA

Hamzah Ali

Bhaiya you are my life changer aapke vaise DSS start kiya maine abhi tak main 2 mahine se abhi main Abhi Tak Main consistent hun

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AK

Ankit Kumar Shahi

It's just great it really improved my problem solving approach; it's just great

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MK

Mohd Kamran

This is very very useful sheet for those students who is not from CS background and doing MCA like me , before starting proper DSA it is starter pack which must take everyone.

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H

Harsh

Amazing sheet for beginners

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PS

Priya Suresh Chauhan

Currently in 3rd year Computer engineering As I have not completed yet but still doing it. It helps to give motivation and seat for next hours😌. Thanks a lot bhaiya for doing lot for us. Sach bolu tho aapke liya thanks bhi kaam hai😊. I want to meet onces in a life. Chalo placement ke baad jarur🤗

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RJ

Rishabh Jain

It was great for beginners perspective. It helped me improve my logic.

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GS

Gaurav Soni

The sheet is very helpful for the initials of DSA problem solving

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MB

Mayank Bajaj

Such as amazing and interactive community

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AK

Abhishek Kumar

150 sheet wad good i have learned a lot..and found even finding gcd is not as that easy as we think .. And in college they r trying to teach 3d array instead of helping students to solve these basic stuffs first ..thnks a lot 🛤️for this

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YP

Yash Paliwal

It is really helpful for my problem solving skills , now I am getting logic easily.

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RP

Rohan Parihar

I just started exploring this content. Keep it up, good work

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R

Rajesh

Questions are good for beginner

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SG

Simran Garg

Overwhelming by receiving such an extraordinary sheet of all the required important questions!

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Pratham Shinde

Your way of staring the session and creating a friendly environment is very great! Great communication with you brother! Loved your thoughts and heads off to your struggle! Keep growing & motivating!

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RM

Rihan Mulani

He provided concise, effective guidance on optimizing my tech stack and navigating interpersonal interactions effortlessly. What a gem of a guy!

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NP

Nilesh Patidar

Talking to you was really worth it. I was confused about my career, but after your mentorship, I feel more confident. You've cleared many doubts for me, and I appreciate it.

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S

Sandeep

Best guidance session ever!! Got various insights into the current market trend!!

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NS

Nikhil Sharma

I love the very friendly and open nature of Prince bhaiya. He talked to me like an elder brother. It was an amazing experience for me. I learned a lot from his experiences. Thanks bhaiya.

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PM

Pranav Muley

That's a great experience, giving a proper path for DSA which is impactful to learners. In this world, so few people help students find the right path without any fees. I appreciate it a lot... I really enjoyed it. I will definitely recommend my friends to get a 1:1 mentorship session to clear their path.... At last, thank you 🙏🙏 once again...

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NK

Naveen Kumar Goli

It was a great meeting with you bro. The way you explain the things that you had experienced in your life was immense... The knowledge you have about the tech stack is really excellent and the way you guide to manage time is truly inspiring. Thank you so much for sharing your valuable time... I hope this meeting won't be the last...🤝🏻😊

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NJ

Nitin Jhajharia

Absolutely great session, got so many insights not only on placements and coding but also on different aspects of life. Very down-to-earth person giving his best to serve us all :)

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FAQ

Questions,answered straight.

Still unsure where to start? Pick a goal at the top of the page and follow the route.

Start with the free sheet
  • Yes. All 150 problems - statements, examples and test cases - are free forever. Log in to track your progress. Solutions for the first section are free too; the rest unlock with TRISHUL or FTM.

  • Instead of a flat problem list, it groups problems by pattern - sliding window, two pointers, BFS/DFS, DP and more - with the recognition clue for each, so you learn to spot the problem type, not memorise solutions.

  • Four premium paths - AI Architect, Everything About DSA, Algorithm Accelerator and System Design - with progress tracking, XP and ranks, and a verifiable certificate for every path you finish. Some plans also include 1:1 sessions.

  • You pick one of eight focused topics - AI engineering, DSA, remote jobs, resume, mock interviews and more. It's 45 minutes 1:1 with Prince, booked right here, with a Google Meet link. You leave with a specific plan you can act on the same day.

  • Full-Time Personalized Mentorship runs 3, 6 or 12 months: a weekly sprint plan, a Saturday review with a mock interview, and Sunday re-planning - until you're placed. Not sure yet? Book a single trial session first.

  • It has 21 phases and 63 hands-on projects, from Next.js SaaS fundamentals to production multi-LLM systems. It's self-paced; in FTM it's sequenced into weekly sprints for you.

  • No - each account is for one person. Progress, XP and certificates are issued in that learner's name.