This is the README file for IOI 2001 competition task Double. This directory includes - the task description, double.rtf - the competition input files, double_n.in, n=1,..,10 - correct output files double_n.out, n=1,..,10. Unfortunately the libraries etc. are not available as yet. If you want to check up the solution, please see the IOI 2001 publication, which you can ftp from ftp://ftp.cs.uta.fi/pub/reports/pdf/A-2001-7.pdf