To approach a data structure problem, follow these steps:
Understand the problem statement: Read the problem statement carefully and make sure you understand the requirements and constraints.
Identify the relevant data structures: Think about what data structures will be most suitable for storing and manipulating the given data.
Design the solution: Come up with an algorithm or plan to solve the problem using the selected data structures. Consider edge cases and optimize for time and space complexity.
Write code: Translate your algorithm into code, using the appropriate data structures.
Test your code: Test your solution using sample inputs and edge cases. Make sure your code is working as expected.
Analyze time and space complexity: Evaluate the time and space complexity of your solution and see if it meets the requirements of the problem.
Repeat the process: If your solution is not working as expected or if the time or space complexity is not optimal, repeat the process from step 3 and try to come up with a better solution.