2018-2019 ACM-ICPC, Asia Xuzhou Regional Contest-M:Rikka with Illuminations(计算几何)
M.RikkawithIlluminationstimelimitpertest8.0smemorylimitpertest1024MBinputstandardinputoutputstandardoutputRikkalovesconvexpolygons,soshedecidestoinstallsomeilluminantstoembellishpolygons.Nowshehasalar