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Language: Convex hull
Description There are Input The input contains the description of one test including: - a line with value
*M*; *M*lines; every line contains coordinates of the center and the radius for one circle. These are real numbers separated by spaces.
Output The output contains a single line with the result given with accuracy 10 Sample Input 4 0 0 1 0 4 1 4 4 1 4 0 1 Sample Output 35.1416 Source Northeastern Europe 2001, Western Subregion |

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