暴力+构造
If r?-?l?≤?4 we can all subsets of size not greater than k.
Else, if k?=?1, obviously that answer is l. If k?=?2,
answer is 1, because xor of numbers 2x and 2x?+?1 equls 1.
If k?≥...
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其他好文 时间:
2014-08-24 11:40:22
阅读次数:
233
Problem 35
The number, 197, is called a circular prime because all rotations of the digits: 197, 971, and 719, are themselves prime.
There are thirteen such primes below 100: 2, 3, 5, 7, 11, 13,...
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其他好文 时间:
2014-08-22 17:52:39
阅读次数:
185
The people living in large citieshave to pay more tax than people living in rural areas. That is because incities people have many facilities, which rural people don’t have. Also peoplein large and fa...
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其他好文 时间:
2014-08-22 10:53:36
阅读次数:
178
遇到问题:
第一次从外部文件导入HelloWorld工程到workspace目录中,成功。
删除后,再次从外部导入workspace目录提示 Some projects cannot be imported because they already exist in the workspace
eclipse中删除HelloWorld工程时没有勾选Delete pr...
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系统相关 时间:
2014-08-21 17:10:34
阅读次数:
218
Problem Description
After inventing Turing Tree, 3xian always felt boring when solving problems about intervals, because Turing Tree could easily have the solution. As well, wily 3xian made lots of n...
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其他好文 时间:
2014-08-20 12:36:32
阅读次数:
382
because, as, for, since这几个词都是表示“原因”的连词,语气由强至弱依次为:because→since→as→for;其中because, since, as均为从属连词,引导原因状语从句;而for 是并列连词,引导并列句。 1. because表示直接原因,它所指的原因通常....
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其他好文 时间:
2014-08-20 09:12:46
阅读次数:
246
Because chances are they're going to tell cheap ghd straighteners nz their friends or when they get comments on how great it looks you get the infamou...
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其他好文 时间:
2014-08-19 12:16:44
阅读次数:
246
std::map插入已存在的key时,key对应的内容不会被更新,如果不知道这一点,可能会造成运行结果与预期的不一致“Because element keys in amapare unique, the insertion operation checks whether each inserte...
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其他好文 时间:
2014-08-19 10:38:03
阅读次数:
226
[html] view plain copy print ? GridPanel row spanning (well, sort of...) The current GridPanel implementation doesn‘t support row spanning, because the rows aren‘t part of the same table. The only ...
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Web程序 时间:
2014-08-18 16:37:53
阅读次数:
327
win7(我用的是笔记本)在nodejs官方网站下载.msi文件安装,安装到一半的时候,进度条提示:roll back,because of a error.node.js setup wizard ended prematurely.最后手动安装下exe载包和配置环境变量。这篇文章里面说到要自己编...
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Web程序 时间:
2014-08-17 11:40:32
阅读次数:
262