2011年B题数学建模试题程序。对于第一问用到了贪婪算法和floyd算法，对于后面的优化问题用到了遗传算法。此程序可以作为此试题的参考答案，很好的解决了这道试题。-2011 B math modeling test procedures. For the first question by the greedy algorithm and Floyd algorithm, for the back of the optimization problem using the genetic algorithm. This program can be used as the reference answer the questions, very good solve the exam question.