How can I quickly delete the files you want to delete from thousands of files ?? The key is algorithms !!

How can I quickly delete the files you want to delete from thousands of files ?? The key is algorithms !! Delphi/Windows SDK/API
Http://www.delphi2007.net/DelphiAPI/html/delphi_20061106211720292.html
How to quickly delete the files you want to delete from thousands of files? These files are recorded by time, such as 20061106101010.txt,200611061212.txt.... Then, I will delete the old files according to the FIFO principle,
Which of the following is a good solution !!

You can use an array to record the records when they are stored, and then delete the records based on the FIFO principle. I don't know if this meets your requirements.