![「BZOJ1651」[Usaco2006 Feb] Stall Reservations 专用牛棚](http://hzwer.com/wp-content/themes/ly/image/image_post/s.jpg)
DescriptionOhthosepickyN(1<=N<=50,000)cows!TheyaresopickythateachonewillonlybemilkedoversomeprecisetimeintervalA..B(1<=A<=B<=1,000,000),whichincludesbothtimesAandB.Obviously,FJmustcreateareservationsystemtodeterminewhichstalleachcowcanbeassignedforhermilkingtime.Ofcourse,nocowwillsharesuchaprivatemomentwithothercows.HelpFJbydetermining:*Theminimumnumberofstallsreq...
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