Cover problem ★ Problem Description : Communications ready n villages installation of base stations in certain villages , the village i, in which the base station to establish spending Is Ci. We village as a point on a two-dimensional plane . For each base station , their specifications , configurations are Same , the base station transmits a signal which can be covered with the center of the circular area of radius R m ( also the boundary Operators covered) . Now the company hopes to use the smallest cost , making this n villages can be overwritten signal. ★ experimental tasks : For information given the location and construction of the village station , find the minimum cost companies covering all the villages. ★ Data input : The first line is an integer n (1 <= n <= 20) representative of a given number of villages. The next n lines, each line has three integers xi yi ci, denote the coordinates of the village and the village built in the i-th Takes the base station.

cover.cpp

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