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http://hi.baidu.com/chenwenwen0210/item/1e388319378893d8dceecad3

Posted by yygy at 2013-02-23 14:19:52 on Problem 1873
In Reply To:WA了一大堆,原来是凸包写错了,后来改写水平序的凸包,过了。看来极角序的凸包果然有问题啊。 Posted by:yygy at 2013-02-23 14:15:44


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