同样是美国东部区竞赛题之一,也是本人亲自编写回答的.题目是有2段公路平行,之间有建筑物阻挡视线,你在其中一条上行驶,求可视距离是多少.其中包含TXT文档内资料为建筑物坐标.例20,30即为建筑物坐标在20-30之间,即阻挡了10的可视距离.-Competition is also a problem area, one of the eastern United States, but also personally prepared to answer. The subject is a tw

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