Grind 75 Bot - Master LeetCode questions with Spaced Repetition

What is Grind 75 Bot?

Grind 75 Bot is a Telegram bot that helps you systematically practice the Grind 75 LeetCode list of problems using spaced repetition - the same technique that makes language learning apps like Anki so effective.

                Key Features:
                Daily personalized task plans (2 tasks per day)
Smart review scheduling based on your performance
Gamification: XP, levels, streaks, and global leaderboard
Filter by difficulty (Easy, Medium, Hard)
Filter by category (Array, Graph, Dynamic Programming, etc.)
Timezone-aware notifications

            

Why I Built This

Like many software engineers, I've studied LeetCode problems multiple times over the years. The frustrating pattern was always the same: I'd understand the algorithms perfectly, solve problems confidently... and then forget the crucial DSA details 6-12 months later.

The solution came from an unexpected place - the gym. For the past 3 years, I've maintained a consistent workout routine. The secret isn't intensity or motivation; it's steady, incremental progress. Small efforts, repeated consistently, compound into remarkable results.

Grind 75 Bot applies this same principle to data structure and algorithm mastery. Instead of cramming before interviews, you build lasting knowledge through daily practice. The spaced repetition algorithm ensures you review problems just as you're about to forget them, creating strong, permanent memory traces.

                The goal: Just like physical fitness, your data structure and algorithm skills become
                something you maintain effortlessly rather than rebuild repeatedly.
            

Whether you're preparing for interviews at Google, Amazon, Meta, Apple, Microsoft, or any other top tech company, Grind 75 Bot helps you land your dream job with the confidence that comes from truly mastering data structures and algorithms—not through last-minute memorization.

The SM2 Algorithm

The bot uses the SuperMemo 2 (SM2) algorithm, a proven spaced repetition technique developed in the 1980s and still widely used today.

How It Works

After each problem, you rate your performance:

Solved easily - You remembered everything perfectly
A few hiccups - Minor hesitations but got it right
Really struggled - Took significant effort to solve
Couldn't solve - Need to review the solution

Based on your response, the algorithm calculates:

Interval - Days until your next review (grows exponentially for easy recalls)
Easiness Factor (EF) - How "learnable" this problem is for you

EF' = EF + (0.1 - (5 - q) * (0.08 + (5 - q) * 0.02))

Problems you find easy get reviewed less frequently (saving time), while challenging problems appear more often until you've truly mastered them.

Stay Motivated with Gamification

Building lasting habits requires motivation. That's why Grind 75 Bot includes a lightweight gamification system designed to keep you engaged without feeling overwhelming.

Earn XP and Level Up

Every problem you solve earns you experience points (XP) based on:

Difficulty - Hard problems earn 3x more XP than Easy ones
Performance - Perfect solutions earn double XP
Repetition - Bonus XP for reviewing problems you've mastered
Streak - Up to 50% bonus XP for maintaining daily consistency

Your total XP determines your level. The leveling system uses exponential progression, making higher levels truly prestigious. Reaching level 100 requires dedication and consistency—a real achievement worth celebrating!

Build Your Streak

Complete your daily plan to maintain your streak. The bot gives you 2 freeze days (life happens!), so missing 1-2 days won't break your streak. But after 3+ days of inactivity, you'll start fresh. This balance keeps you motivated without being punitive.

Compete Globally

Check the /leaderboard command to see how you stack up against other users worldwide. Usernames are anonymized for privacy, but you'll know where you stand. Use it as inspiration to keep grinding!

Track Your Progress

The /stats command shows your complete journey: current level, XP progress, longest streak, and detailed breakdowns by difficulty. Watch your stats improve as you build your DSA skills day by day.

                Remember: The gamification is there to support your learning journey, not replace it.
                The real reward is the confidence you'll have walking into your next technical interview.
            

Join Now

Set up your daily notification schedule to get started:

Your Name

Please enter your name

Notification Time

Please select a complete time

Timezone

Please select your timezone

About the Author

Anton Efremov

Software Engineer with 10 years of experience at SAP, specializing in enterprise software development. Currently focused on Go programming and cloud-native applications on AWS.

Passionate about learning systems, spaced repetition, and building tools that help developers grow their skills systematically.

Connect on LinkedIn

Report a Bug

Found a bug or have feedback? I'd love to hear from you! Reach out directly on Telegram and I'll get back to you as soon as possible.

Contact Anton

Support the Project

Grind 75 Bot is free. If you find it helpful and want to support its development, consider buying me a coffee. Your support helps cover hosting costs and motivates continued improvements!

Buy me a coffee