![「BZOJ1651」[Usaco2006 Feb] Stall Reservations 专用牛棚](http://hzwer.com/wp-content/themes/ly/image/image_post/13551A96-4392-408E-9310-0584439C9FDE.png)
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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