C(9, 4) = 126
所有跟帖:
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yongcheng走了,你该出山了。:
-微风徐来--
♀
(32 bytes)
()
01/30/2012 postreply
22:48:02
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可以解释一下?
-test.future-
♀
(66 bytes)
()
01/31/2012 postreply
00:11:15
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a+b+c+d+e=5 (a,b,c,d,e>=0)
-柯西-
♀
(189 bytes)
()
01/31/2012 postreply
10:01:33
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a+b+c+d+e=10 (a,b,c,d,e>=1)
-nj_guy-
♂
(228 bytes)
()
01/31/2012 postreply
11:14:17
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谢谢二位
-Test.future-
♀
(54 bytes)
()
01/31/2012 postreply
17:49:10