http://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/ Engadget 中国版 Comments for 如果你的红色警戒 3 序号少一个号码... http://cn.engadget.com/media/feedlogo.gif http://cn.engadget.com en-us Copyright 2009 Weblogs, Inc. The contents of this feed are available for non-commercial use only. Blogsmith http://www.blogsmith.com/http://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/http://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/Nov 4th 2008 7:48AMhttp://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/http://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/Nov 4th 2008 7:48AMhttp://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/http://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/Nov 4th 2008 7:50AMhttp://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/http://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/Nov 4th 2008 8:02AMhttp://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/http://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/Nov 4th 2008 9:01AMhttp://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/http://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/如果从36个符号中取20个的所构成的组合（不排序）有多少种？
36C20=36!/(20!*16!)=7,307,872,110

如果从36个符号中取20个的所构成的排列（排序）有多少种？
36P20=36C20*20!=1.77793x10^28
]]>Nov 4th 2008 8:21AMhttp://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/http://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/Nov 4th 2008 8:29AMhttp://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/http://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/Nov 4th 2008 8:32AMhttp://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/http://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/Nov 6th 2008 11:33PMhttp://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/http://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/不知道大陆有没正版……]]>Nov 4th 2008 9:15AMhttp://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/http://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/不碍事，反正RA1RA2也都没正版卖]]>Nov 5th 2008 3:10AMhttp://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/http://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/Nov 4th 2008 9:18AMhttp://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/http://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/Nov 4th 2008 11:45AMhttp://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/http://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/Nov 4th 2008 8:19PMhttp://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/http://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/
]]>Nov 5th 2008 3:05AMhttp://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/http://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/Nov 5th 2008 8:11PMhttp://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/http://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/Nov 5th 2008 7:04AMhttp://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/http://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/Nov 4th 2008 2:11PMhttp://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/http://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/Nov 4th 2008 7:56PMhttp://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/http://cn.engadget.com/2008/11/04/if-youre-red-alert-3-serial-is-missing-one-digit/第一款游戏就是红警，怀念经典阿]]>Nov 4th 2008 7:40PM