The minimal tour 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。

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For each postal route the output should consist of the cost of the minimal tour 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。

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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.

在进行一组必需的轻微的配置更改之前，本节将为您简单介绍CodeIgniter，使您熟悉它的基础知识。

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