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代码说明：

说明：  缴费点选址问题，是数模中的热点，可以通过对最短路程、居民满意度、排队等待时间综合考虑，得到较为全面合理的结果(Payment point location problem is one of several modes in the hot, can by the shortest distance, residents satisfaction, waiting time into account, to be more comprehensive and rational results)