valueat[i]

Learn the patterns behind every interview problem, not just the answers.

20 pattern tracks · 308 guided lessons · Python · JavaScript · Java

Find Your Starting Point →Browse Pattern Tracks

How you learn here

Reading solutions does not build skill. Every problem on Valueati runs the same loop: understand the pattern, attempt it yourself, then review it until it sticks.

1

Read the lesson

Every problem has its own lesson: how to recognize the pattern, why brute force is slow, and the insight that fixes it.

2

Think it through

Guess the pattern, predict what breaks brute force, and climb the hint ladder before the answer is revealed.

3

Code it

Write and run your solution in Python, JavaScript, or Java in the built-in editor.

4

Make it stick

Solved problems come back on a spaced schedule. Recall the approach, rate your confidence, and build pattern mastery.

Who is this for?

Doesn't matter if you're brand new or grinding LeetCode. If you need to understand the "why" behind the code, you're in the right place.

Switching Careers

Start from scratch without drowning in jargon.

Post-Bootcamp

You can build apps but freeze on whiteboards. Fix that.

Self-Taught

Plug the holes in your knowledge. No more guessing.

CS Students

Way better than reading a textbook at 2am.

Junior Devs

Patterns that actually show up in production code.

Interview Prep

Easy → Medium → Hard. Sorted by the stuff interviewers ask.

Simple, honest pricing

Every lesson and guided practice is free. Pro unlocks the full walkthroughs.

Free

$0

  • Lessons & guided practice on all 308 problems
  • Full walkthroughs on 50 free problems
  • Built-in code editor (Python, JavaScript, Java)
  • Progress, mastery & review queue
  • Dark mode
Start Learning Free
POPULAR

Pro Annual

$99/yr

$8.25/mo

  • All 308 solution walkthroughs
  • Every pattern track & difficulty
  • Step-by-step breakdowns
  • Time & space complexity analysis
  • New problems added regularly
  • Priority support
Go Pro ($99/yr)

Lifetime

$249

one-time, forever

  • All 308 solution walkthroughs
  • Every pattern track & difficulty
  • Step-by-step breakdowns
  • Time & space complexity analysis
  • New problems added regularly
  • Priority support
  • Never pay again
  • Early adopter price
Get Lifetime ($249)