### Problems (September 8, 2009)

You can either choose to do some problems from last time or just do some of the new problems.

1. Register at the TJU online judge (http://acm.tju.edu.cn/toj/), and start
solving the following problems. Note that the order given is not necessarily
the best order to solve the problems.

##### A)

Wine Trading in Gergovia, http://acm.tju.edu.cn/toj/showp2591.html.

##### B)

Ambiguous Permutations, http://acm.tju.edu.cn/toj/showp2132.html.

##### C)

Tri Tiling, http://acm.tju.edu.cn/toj/showp1779.html.

##### D)

How Many 0's?, http://acm.tju.edu.cn/toj/showp2294.html.

##### E)

Marbles on a Tree, http://acm.tju.edu.cn/toj/showp1443.html.

##### F)

Queue, http://uva.onlinejudge.org/external/101/10128.html.

You must register at http://uva.onlinejudge.org to be able to submit this one.