[推荐]真心话大考验

红色企鹅

米经验。。不知道。。。另请高明。。。。

楼下的，帮帮楼上吧。。。What is the most efficient way to forget a past relationship?

算盘

以下是引用Andy15在2004-8-20 13:05:50的发言：

is this method faster than brutal force? i seriously doubt so. btw, a slightly faster method would be:

1st digit + 3 times the 2nd digit + 2 times the 3rd digit - the 4th digit - 3 times the 5th digit - 2 times the 6th digit. And then we repeat the sequence, + the 7th digit + 3 times the 8th digit, etc. If the whole "sum" is divisible by 7, then the original number is divisible by 7.

4712954379 9+3(7)+2(3)-4-3(5)-2(9)+2+3(1)+2(7)-4=14

and since 14 is divisible by 7, the original number is divisible by 7. But again this might not be faster than the brutal force way.

i come back home once a year normally. my question is What is the most efficient way to forget a past relationship?

这种方法比较适合数位较小的数字，而徒弟出的题目数字太大，如果一个个算太麻烦啦！n位数就要计算2n次（乘法n次，加减法n次）。1001法要计算的次数是n/3次（3位数的加减法，故n/3次），明显计算次数少，不过只是三位数加减法略微麻烦一点。根据情况分析啦！不过最简单的肯定还是去末位法，但是只适合小数字。

想忘掉关系，就自杀吧！一了百了。

[em01][em01][em01]

楼下的，午饭吃什么了？

[此贴子已经被作者于2004-8-20 13:42:40编辑过]

Andy15

so u changed ur post. but not in time, i saw it. what makes u think so? discussing a maths question can make u think that way? btw, japanese food for the lunch. my qustion is: is it going to thunder and rain today?

红色企鹅

已经在下雨了。。。

楼下的，帮偶想topic。。。

211vivian

好   你干嘛换头像啊[em07]

红色企鹅

那个都粉久之前滴了。。。

楼下的，偶滴头像可爱不？

shanghaig

企鹅==猫?[em06][em06]

楼下的说可爱不? 我不知道列

红色企鹅

当然当然可爱啦。。。。

楼下的同意吧？

Abele

同意

楼下的冷吗