James Bond Johnnys favorite secret agent new mission there n enemy basis describe coordinate think point cartesian plane the basis communicate send signal ray direct choose point origin opposite direction the exception central base lie origin send signal direction when basis want communicate possible scenario if lie line origin send signal directly Otherwise signal send base central central send second base we denote distance basis total euclidean distance signal send travelbond damage k basis choose arbitrarily a damage base can not send receive direct signal pass work basis in particular James damage central base signal send undamaged basis distance remain what maximal sum distance pair remain basis 007 achieve damaging exactly n k