Reading a Codeforces question efficiently can help you understand the problem and come up with a solution more quickly. Here are a few tips for reading Codeforces questions:

Read the problem statement carefully: Pay attention to the input format, output format, and any constraints on the input.

Look at the sample test cases: These can give you an idea of what the input and output should look like, and can also help you understand the problem more clearly.

Try to understand the problem's structure: Identify the inputs, outputs and the operations that need to be performed on the inputs.

Break down the problem: Identify subproblems and try to solve them individually.

Test your understanding: Try to come up with test cases that will help you validate your understanding of the problem.

Don't be afraid to ask for help: If you are having trouble understanding the problem, don't hesitate to ask for help from other competitors or to seek clarification from the problem setter

Keep it simple: Avoid over-complicating the problem, try to come up with the most simple and efficient solution

Remember that practice and experience will help you improve your ability to read and understand Codeforces questions efficiently.