April 20th, 2015. The day that Mr. Benum the CS teacher vanished into thin air. It was apparent that Mr. Benum would not be back for a while, so a replacement teacher showed up. He went by "Mr. Venom". A sketchy name, but there's more. He wasn't on any teacher database we hacked up; he had no online presence. Even stranger, Mr. Benum had not notified anyone of his absence. And Mr. Venom randomly applied for a job at Thornhill S.S. on the exact day that Mr. Benum disappeared.

No one suspected a thing, except for the members of the computer club. They knew that some shady dealings had occurred, and that they now had to save Mr. Benum from evil forces. Can omaewamoushindeiru, gah111, $=>$bobhob314^u^^swagaf</sup></sup>, kobortor, msa789, PaulOlteanu, and tomtaub rescue Mr. Benum in time to celebrate on this very special day?

Help guide the young investigators rescue their teacher and defeat the evil Mr. Venom via the « Special Day » contest. Problems were authored this time around by gah111, omaewamoushindeiru, bobhob314, and kobortor.

The contest will run for three days starting on April 20th, 2015. You will have three hours to complete the problems. There will be six problems of increasing difficulty, along with one bonus problem.

This round will be rated for all participants.

Remember to use fast input, think smart, and good luck on this very jovial, merry, wanna-dance day!