The tasks for week 8 are as follows:
Week problem: 11101 Mall Mania
Weekend problem: 11367 Full Tank
Suggested bonus: 10557 XYZZY
Read up on shortest paths.
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.