2017 ACM-ICPC 亚洲区(南宁赛区)网络赛 G. Finding the Radius for an Inserted Circle
原题:ThreecirclesC_{a}Ca,C_{b}Cb,andC_{c}Cc,allwithradiusRRandtangenttoeachother,arelocatedintwo-dimensionalspaceasshowninFigure11.AsmallercircleC_{1}C1withradiusR_{1}R1(R_{1}#include#include#include#in