http://acm.hdu.edu.cn/showproblem.php?pid=5172 判断一个区间是否为全排列是: 1、区间总和 = (1 + R - L + 1) * (R - L + 1) / 2; 2、区间没有重复数字 记录数组a[i]表示第i个数上一次在那个位置出现。 那么最需要在[ ...
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其他好文 时间:
2017-07-28 00:59:40
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188
题目: Derek and Alfia are good friends.Derek is Chinese,and Alfia is Austrian.This summer holiday,they both participate in the summer camp of Borussia D ...
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其他好文 时间:
2017-07-27 15:43:29
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425
最近做项目需要设计数据库,其中涉及到用户之间好友以及亲戚关系,暂时提出两个解决方案: 1 建立中间表,将有关系的两个人ID相互对应 2 增加一张关系表,将用户的朋友以及亲戚的ID取出来,用","隔开,存入其中的关系字段,比如friendship字段,设置为varchar类型,读取的时候将内容按照“, ...
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数据库 时间:
2017-07-26 17:33:12
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400
Virtual Friends Font: Times New Roman | Verdana | Georgia Font Size: ← → Problem Description These days, you can do all sorts of things online. For ex ...
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其他好文 时间:
2017-07-26 01:51:10
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241
Being a programmer, you like arrays a lot. For your birthday, your friends have given you an array a consisting of n distinct integers. Unfortunately, ...
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其他好文 时间:
2017-07-25 21:16:47
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155
Make a program that filters a list of strings and returns a list with only your friends name in it. If a name has exactly 4 letters in it, you can be ...
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其他好文 时间:
2017-07-25 12:33:50
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200
Friends Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 163 Accepted Submission(s): 61 Problem D ...
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其他好文 时间:
2017-07-23 19:47:12
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212
Today is Ignatius' birthday. He invites a lot of friends. Now it's dinner time. Ignatius wants to know how many tables he needs at least. You have to ...
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其他好文 时间:
2017-07-23 16:36:42
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139
偶然了解到 Python 里的 itchat 包,它已经完成了 wechat 的个人账号 API 接口,使爬取个人微信信息更加方便。 于是乎玩心一起,打算爬一下自己的微信。 步骤核心: 网页启动notebook pip安装itchat包 登录微信,扫描二维码 获取好友信息 有了上面的friends数 ...
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微信 时间:
2017-07-19 14:17:27
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301
Being a programmer, you like arrays a lot. For your birthday, your friends have given you an array a consisting of n distinct integers. Unfortunately, ...
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其他好文 时间:
2017-07-17 23:47:12
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259