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Re:link(a, b)和link(c, d)可能相交的条件是什么？In Reply To:link(a, b)和link(c, d)可能相交的条件是什么？ Posted by:temp_ptr at 2011-11-08 21:31:57 > return (a-c)*(b-c)*(a-d)*(b-d) < 0;对吗？ WA了4小时，终于找到问题了，上面这个4个数相乘会int 溢出，心情都没了，吃一堑涨一智吧 Followed by:
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