It takes a whole day to finish the entire postal route.
全部邮程需要整整一天才能全部走完。
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。
Gis system for postal logistics, route optimization algorithm introduced and contrast details of the system used by the optimization method.
对邮政物流gis系统中，路线优化的算法进行介绍和对比，详细介绍本系统采用的优化方法。
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