We hope you had fun with the contest. Thank you!
P.S. As usual, the final and official results of the contest will be announced during
P.P.S. About the image(s), try running: java -jar new_books.png > lambda.png
P.P.P.S. We received a report that some anti-virus software (and its vendor!) thinks the image is a virus. Please rest assured - as already announced above, it is a JAR-containing PNG file we have created, hence the false alert. We will soon replace the image with an ordinary one to avoid such confusion.