Get the PDFs
Sample Problem Preview
Here's a taste of what the problems look like. This is one of the sample problems—a classic coding challenge that requires thoughtful implementation.

What to Expect
These problems are designed for developers who understand the basics but need to rebuild depth. They're not interview-style algorithm grinding, but they do require focused thought and won't be solved by copy-pasting from Stack Overflow.
The best practice approach: Print the sheet, work through each problem without looking at the answers, then compare your solution to the guide. Note where you got stuck or where your answer differs from the given solution (both may be right)—that's where learning happens.