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题干： Angel was caught by the MOLIGPY! He was put in prison by Moligpy. The prison is described as a N * M (N, M <= 200) matrix. There are WALLs, ROADs, and GUARDs in the prison.  Angel's friends wa...

题干： Given an integer N, your task is to judge whether there exist N points in the plane such that satisfy the following conditions: 1. The distance between any two points is no greater than 1.0. 2....