The tasks for week 12 are as follows:
Week problem: 11401 Triangle Counting
Weekend problem: 00991 Safe Salutations
Suggested bonus: 11310 Delivery Debacle
You must submit your solutions on http://uva.onlinejudge.org/
You can browse to these problems from the online judge website by clicking on Browse Problems, Contest Volumes, and then selecting the contest volume as indicated above.