The minimaltour costs should be output in the order corresponding to the input postal routes.
最短路径开销应按照输入的邮递路线的相应顺序输出。
2
For each postal route the output should consist of the cost of the minimaltour that visits all streets at least once.
对应输入的每条邮递路线，应输出访问其所有街道至少一次的最短路径的开销。
3
Before you make the minimal set of configuration changes you need to get started, this section takes a quick tour of CodeIgniter so you're familiar with the lay of the land.