Description: Flatopia is a very flat place, the government wants to repair the highway in order to solve the traffic problem.Highway system allows the driver to leave the system is not able to travel between any two cities.Town No. 1 ~ N, each highway connecting the two towns, all highways are straight, bi-directional use.But a driver can only be the end of the road to change the town line.The local government wants to minimize the build up to the required length of roads, however, to ensure every town is achievable.
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work83.cpp
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