http://blog.vckbase.com/bruceteen/category/46.html其他周星星zh-CHS.Text Version 0.958.2004.214周星星http://blog.vckbase.com/bruceteen/archive/2008/01/17/31969.htmlThu, 17 Jan 2008 05:33:00 GMThttp://blog.vckbase.com/bruceteen/archive/2008/01/17/31969.htmlhttp://blog.vckbase.com/bruceteen/comments/31969.htmlhttp://blog.vckbase.com/bruceteen/archive/2008/01/17/31969.html#Feedback8http://blog.vckbase.com/bruceteen/comments/commentRss/31969.htmlhttp://blog.vckbase.com/bruceteen/services/trackbacks/31969.html<img src ="http://blog.vckbase.com/bruceteen/aggbug/31969.html" width = "1" height = "1" />周星星http://blog.vckbase.com/bruceteen/archive/2008/01/07/31680.htmlMon, 07 Jan 2008 08:46:00 GMThttp://blog.vckbase.com/bruceteen/archive/2008/01/07/31680.htmlhttp://blog.vckbase.com/bruceteen/comments/31680.htmlhttp://blog.vckbase.com/bruceteen/archive/2008/01/07/31680.html#Feedback3http://blog.vckbase.com/bruceteen/comments/commentRss/31680.htmlhttp://blog.vckbase.com/bruceteen/services/trackbacks/31680.html<img src ="http://blog.vckbase.com/bruceteen/aggbug/31680.html" width = "1" height = "1" />周星星http://blog.vckbase.com/bruceteen/archive/2008/01/04/31626.htmlFri, 04 Jan 2008 03:48:00 GMThttp://blog.vckbase.com/bruceteen/archive/2008/01/04/31626.htmlhttp://blog.vckbase.com/bruceteen/comments/31626.htmlhttp://blog.vckbase.com/bruceteen/archive/2008/01/04/31626.html#Feedback3http://blog.vckbase.com/bruceteen/comments/commentRss/31626.htmlhttp://blog.vckbase.com/bruceteen/services/trackbacks/31626.html<img src ="http://blog.vckbase.com/bruceteen/aggbug/31626.html" width = "1" height = "1" />周星星http://blog.vckbase.com/bruceteen/archive/2008/01/03/31612.htmlThu, 03 Jan 2008 10:09:00 GMThttp://blog.vckbase.com/bruceteen/archive/2008/01/03/31612.htmlhttp://blog.vckbase.com/bruceteen/comments/31612.htmlhttp://blog.vckbase.com/bruceteen/archive/2008/01/03/31612.html#Feedback14http://blog.vckbase.com/bruceteen/comments/commentRss/31612.htmlhttp://blog.vckbase.com/bruceteen/services/trackbacks/31612.html<img src ="http://blog.vckbase.com/bruceteen/aggbug/31612.html" width = "1" height = "1" />周星星http://blog.vckbase.com/bruceteen/archive/2007/12/19/31403.htmlWed, 19 Dec 2007 03:52:00 GMThttp://blog.vckbase.com/bruceteen/archive/2007/12/19/31403.htmlhttp://blog.vckbase.com/bruceteen/comments/31403.htmlhttp://blog.vckbase.com/bruceteen/archive/2007/12/19/31403.html#Feedback3http://blog.vckbase.com/bruceteen/comments/commentRss/31403.htmlhttp://blog.vckbase.com/bruceteen/services/trackbacks/31403.html<P>4个人，其中有冰箱的占3/4，有洗衣机的占3/4，有空调的占3/4。<BR>那么三样都有的占多少？<BR>三样都有的至少占多少？<BR>三样都有的至多占多少？<BR><BR>----------------------------------------------------------------------------------------</P> <P>三样都有的占多少？<BR>结论：3/4 * 3/4 * 3/4 = 27/64 = 42%<BR>思路：3/4有冰箱的人 中3/4的人 有洗衣机，即3/4*3/4，&#8230;&#8230;<BR>验证：做出所有的全排列，将全排列看成是一个排列，统计三样都有的比例</P> <P>三样都有的至少占多少？（即求最小的差集）<BR>结论：3/4 + 3/4 + 3/4 - 1 -1 = 1/4 = 25%<BR>思路：假设3/4有冰箱的人 中 包含了尽可能多的没洗衣机的人（1-3/4），即两者都有的占 3/4-(1-3/4)，&#8230;&#8230;<BR>验证：做出所有的全排列，统计每个排列中三样都有的比例，然后取最小的那个比例</P> <P>三样都有的至多占多少？<BR>结论：min( 3/4, 3/4, 3/4 ) = 3/4 = 75%<BR>思路：假设3/4有冰箱的人 中 包含了尽可能多的有洗衣机的人（3/4），即两者都有的占 min(3/4,3/4)，&#8230;&#8230;<BR>验证：做出所有的全排列，统计每个排列中三样都有的比例，然后取最大的那个比例</P><img src ="http://blog.vckbase.com/bruceteen/aggbug/31403.html" width = "1" height = "1" />周星星http://blog.vckbase.com/bruceteen/archive/2007/10/30/30312.htmlTue, 30 Oct 2007 04:34:00 GMThttp://blog.vckbase.com/bruceteen/archive/2007/10/30/30312.htmlhttp://blog.vckbase.com/bruceteen/comments/30312.htmlhttp://blog.vckbase.com/bruceteen/archive/2007/10/30/30312.html#Feedback8http://blog.vckbase.com/bruceteen/comments/commentRss/30312.htmlhttp://blog.vckbase.com/bruceteen/services/trackbacks/30312.html<img src ="http://blog.vckbase.com/bruceteen/aggbug/30312.html" width = "1" height = "1" />周星星http://blog.vckbase.com/bruceteen/archive/2007/05/10/26147.htmlThu, 10 May 2007 08:42:00 GMThttp://blog.vckbase.com/bruceteen/archive/2007/05/10/26147.htmlhttp://blog.vckbase.com/bruceteen/comments/26147.htmlhttp://blog.vckbase.com/bruceteen/archive/2007/05/10/26147.html#Feedback10http://blog.vckbase.com/bruceteen/comments/commentRss/26147.htmlhttp://blog.vckbase.com/bruceteen/services/trackbacks/26147.html<img src ="http://blog.vckbase.com/bruceteen/aggbug/26147.html" width = "1" height = "1" />周星星http://blog.vckbase.com/bruceteen/archive/2007/03/12/24822.htmlMon, 12 Mar 2007 06:06:00 GMThttp://blog.vckbase.com/bruceteen/archive/2007/03/12/24822.htmlhttp://blog.vckbase.com/bruceteen/comments/24822.htmlhttp://blog.vckbase.com/bruceteen/archive/2007/03/12/24822.html#Feedback2http://blog.vckbase.com/bruceteen/comments/commentRss/24822.htmlhttp://blog.vckbase.com/bruceteen/services/trackbacks/24822.html<img src ="http://blog.vckbase.com/bruceteen/aggbug/24822.html" width = "1" height = "1" />周星星http://blog.vckbase.com/bruceteen/archive/2007/01/25/24195.htmlThu, 25 Jan 2007 03:13:00 GMThttp://blog.vckbase.com/bruceteen/archive/2007/01/25/24195.htmlhttp://blog.vckbase.com/bruceteen/comments/24195.htmlhttp://blog.vckbase.com/bruceteen/archive/2007/01/25/24195.html#Feedback7http://blog.vckbase.com/bruceteen/comments/commentRss/24195.htmlhttp://blog.vckbase.com/bruceteen/services/trackbacks/24195.html<img src ="http://blog.vckbase.com/bruceteen/aggbug/24195.html" width = "1" height = "1" />周星星http://blog.vckbase.com/bruceteen/archive/2006/12/06/23377.htmlWed, 06 Dec 2006 05:53:00 GMThttp://blog.vckbase.com/bruceteen/archive/2006/12/06/23377.htmlhttp://blog.vckbase.com/bruceteen/comments/23377.htmlhttp://blog.vckbase.com/bruceteen/archive/2006/12/06/23377.html#Feedback19http://blog.vckbase.com/bruceteen/comments/commentRss/23377.htmlhttp://blog.vckbase.com/bruceteen/services/trackbacks/23377.html<img src ="http://blog.vckbase.com/bruceteen/aggbug/23377.html" width = "1" height = "1" />