How Do I Solve DSA Problems When I Know the Theory?

You typically begin with a problem rather than a predetermined solution for specific issues. It’s about recognizing patterns. Familiarize yourself with common solutions, so when a similar problem comes up, you can see the connection and apply what you know. For instance, linked lists are useful when you need to add elements at arbitrary points. If your problem doesn't fit that scenario, then stick with simpler solutions like arrays.

If you're aware of the strengths and weaknesses of a linked list, it’s easier to decide whether a simpler array could suffice or if you need the complexity of a linked list. Just break down the problem into smaller components until you reach that decision point. For example, reversing a linked list may seem easy, but it can be tricky if you’re not familiar with the steps involved.

Understanding the use cases along with the pros and cons of different data structures is key. That knowledge helps you decide which structure to use when faced with a problem. It gets easier with practice! Also, don't hesitate to try different approaches to see what clicks, especially as you're starting out.