A graph problem
- by copperhead
I am struggling to solve the following problem
http://uva.onlinejudge.org/external/1/193.html
However Im not able to get a fast solution.
And as seen by the times of others, there should be a solution of maximum n^2 complexity
http://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=3&page=show_problem&problemid=129&page=problem_stats
Can I get some help?