Redian新闻
>
3个提高英文口语的网站
avatar
3个提高英文口语的网站# Education - 教育学
l*r
1
【 以下文字转载自 NBA 讨论区 】
发信人: dpg (正在锁定培养对象中。。。), 信区: NBA
标 题: 来,聊聊昨天的侦查记吧(2)
发信站: BBS 未名空间站 (Wed Apr 9 21:36:28 2008), 站内
发信人: afei (阿飞), 信区: SanFrancisco
标 题: 来,聊聊昨天的侦查记吧(2)
发信站: BBS 未名空间站 (Wed Apr 9 20:48:20 2008)
到了大本营,我在想啊,巡逻队啊,那怎么也得有点家里森敢死队的味道对不对?那肯
定都是流氓中的流氓,烂人中的烂人,丐帮百年来最干净最有前途的少帮主那种人对不
?所以为了融入环境,我昨天上班时间就一直在看sex版,sorry,是哲学版增加自己的
深度,以便集体能够接受我。看,我为了正义的事业作了多么大的牺牲啊。
所以你们可以想象我一进门,听见一小丫头片子倚门回首的跟家里打电话撒娇的时候,
是多么惊讶啊,我靠,谁拐带幼女了?然后我惊讶的发现里面是一屋的丫头片子和半大
小子,我靠,使用童工是违法的啊。berkeley和stanford的PhD小朋友,你们走错地方
了,爱
avatar
o*n
2
If the girlfriends of 3 couples are seated in fixed position around a table,
there is only one possible way to seat their boyfriends so that men and
women alternate and no boyfriend is next to his girlfriend. With 4 couples,
there are two possible arrangements.
How many possible arrangements are there with 5, 6, and 10 couples?
avatar
g*i
3
我们要建一个服务器,连接多台个人机,个人机做的作业交给服务器进行分析和管理。
这种情况下需要用什么软件、方法,硬件对数据进行收集好呢?数据收集后一般以什么
形式、软件存储呢?还有一般data clean的方法都有哪些?谢谢!
avatar
S*g
5
(n-2)!

table,
couples,

【在 o***n 的大作中提到】
: If the girlfriends of 3 couples are seated in fixed position around a table,
: there is only one possible way to seat their boyfriends so that men and
: women alternate and no boyfriend is next to his girlfriend. With 4 couples,
: there are two possible arrangements.
: How many possible arrangements are there with 5, 6, and 10 couples?

avatar
b*5
6
Thanks for sharing!
avatar
o*n
7
hehe, that's my first answer too. but think very carefully, you can take n=
5 as your starting point...

【在 S*********g 的大作中提到】
: (n-2)!
:
: table,
: couples,

avatar
o*n
8
no one interested in this problem? or too easy? :)

table,
couples,

【在 o***n 的大作中提到】
: If the girlfriends of 3 couples are seated in fixed position around a table,
: there is only one possible way to seat their boyfriends so that men and
: women alternate and no boyfriend is next to his girlfriend. With 4 couples,
: there are two possible arrangements.
: How many possible arrangements are there with 5, 6, and 10 couples?

avatar
y*5
9
f(5)=13, f(6)=80?
no clue about f(10).

table,
couples,

【在 o***n 的大作中提到】
: If the girlfriends of 3 couples are seated in fixed position around a table,
: there is only one possible way to seat their boyfriends so that men and
: women alternate and no boyfriend is next to his girlfriend. With 4 couples,
: there are two possible arrangements.
: How many possible arrangements are there with 5, 6, and 10 couples?

avatar
o*n
10
我没有标准答案,呵呵
我也得到了f(5)=13,不过我基本上是硬排的,你有什么clue没?

【在 y*******5 的大作中提到】
: f(5)=13, f(6)=80?
: no clue about f(10).
:
: table,
: couples,

avatar
y*5
11
俺也是硬排的,hoho。
f(6)也是这样硬数的。

【在 o***n 的大作中提到】
: 我没有标准答案,呵呵
: 我也得到了f(5)=13,不过我基本上是硬排的,你有什么clue没?

相关阅读
logo
联系我们隐私协议©2024 redian.news
Redian新闻
Redian.news刊载任何文章,不代表同意其说法或描述,仅为提供更多信息,也不构成任何建议。文章信息的合法性及真实性由其作者负责,与Redian.news及其运营公司无关。欢迎投稿,如发现稿件侵权,或作者不愿在本网发表文章,请版权拥有者通知本网处理。