nyoj Registration system
Registration system
- 描述
-
A new e-mail service "Berlandesk" is going to be opened in Berland in the near future.
The site administration wants to launch their project as soon as possible, that's why they
ask you to help. You're suggested to implement the prototype of site registration system.
The system should work on the following principle.
Each time a new user wants to register, he sends to the system a request with his name.
If such a name does not exist in the system database, it is inserted into the database, and
the user gets the response OK, confirming the successful registration. If the name already
exists in the system database, the system makes up a new user name, sends it to the user
as a prompt and also inserts the prompt into the database. The new name is formed by the
following rule. Numbers, starting with 1, are appended one after another to name (name1,
name2, ...), among these numbers the least i is found so that namei does not yet exist in
the database.

- 输入
- The first line contains number n (1 ≤ n ≤ 105). The following n lines contain the requests to the system. Each request is a non-empty line, and consists of not more than 1000 characters, which are all lowercase Latin letters.
- 输出
- Print n lines, which are system responses to the requests: OK in case of successful registration, or a prompt with a new name, if the requested name is already taken.
- 样例输入
-
4 abacaba acaba abacaba acab
- 样例输出
-
OK OK abacaba1 OK
#include <iostream>
#include <map>
using namespace std;int main()
{
int n;
map<string,int> m;
cin>>n;
while(n--)
{
string s;
cin>>s;if(m[s])
cout<<s<<m[s]<<endl;
else
cout<<"OK"<<endl;
m[s]++;
}
return 0;
}map:数据的插入
在构造map容器后,我们就可以往里面插入数据了。这里讲三种插入数据的方法:
第一种:用insert函数插入pair数据
map<int, string> mapStudent;
mapStudent.insert(pair<int, string>(1,“student_one”));第二种:用insert函数插入value_type数据
map<int, string> mapStudent;
mapStudent.insert(map<int, string>::value_type (1,"student_one"));mapStudent.insert(make_pair(1, "student_one"));
第三种:用数组方式插入数据map<int, string> mapStudent;
mapStudent[1] = “student_one”;
mapStudent[2] = “student_two”;/*如果是
#include <map>
map<string, int> mapStudent;string s;
插入就用m[s]++;*/以上三种用法,虽然都可以实现数据的插入,但是它们是有区别的,当然了第一种和第二种在效果上是完成一样的,用insert函数插入数据,在数据的插入上涉及到集合的唯一性这个概念,即当map中有这个关键字时,insert操作是不能再插入这个数据的,但是用数组方式就不同了,它可以覆盖以前该关键字对应的值,即:如果当前存在该关键字,则覆盖改关键字的值,否则,以改关键字新建一个key—value;
nyoj Registration system的更多相关文章
- nyoj 911 Registration system(map)
Registration system 时间限制:1000 ms | 内存限制:65535 KB 难度:2 描述 A new e-mail service "Berlandesk&q ...
- nyoj 991 Registration system (map)
Registration system 时间限制:1000 ms | 内存限制:65535 KB 难度:2 描述 A new e-mail service "Berlandesk&q ...
- ACM Registration system
Registration system 时间限制:1000 ms | 内存限制:65535 KB 难度:2 描述 A new e-mail service "Berlandesk&q ...
- Codeforces Beta Round #4 (Div. 2 Only) C. Registration system hash
C. Registration system Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/problemset ...
- c题 Registration system
Description A new e-mail service "Berlandesk" is going to be opened in Berland in the near ...
- CodeForces-4C Registration system
// Registration system.cpp : 此文件包含 "main" 函数.程序执行将在此处开始并结束. // #include <iostream> # ...
- (用了map) Registration system
http://acm.hust.edu.cn/vjudge/contest/view.action?cid=93241#problem/C (654123) http://codeforces.com ...
- codeforces Registration system
Registration system A new e-mail service "Berlandesk" is going to be opened in Berland in ...
- Codeforces Beta Round #4 (Div. 2 Only) C. Registration system【裸hash/map】
C. Registration system time limit per test 5 seconds memory limit per test 64 megabytes input standa ...
随机推荐
- python-day28--logging模块
1.默认情况下Python的logging模块将日志打印到了标准输出中,且只显示了大于等于WARNING级别的日志,这说明默认的日志级别设置为WARNING(日志级别等级CRITICAL > E ...
- exec可以用来执行语句的
set @sql='select * from '+@table print @sql exec(@sql)
- map和unordered_map
1.boost::unordered_map, 它与 stl::map的区别就是,stl::map是按照operator<比较判断元素是否相同,以及比较元素的大小,然后选择合适的位置插入到树中. ...
- 阿里云ECS服务器自定义端口无法访问问题记录
记住阿里云ECS服务器有个安全组!!! 购买了阿里云服务器的时候,购买界面那里是可以勾选默认的几个端口是否开启的,服务器默认勾了22端口,使用户能登录服务器. 当我们在服务器里面配置nginx,开启自 ...
- vue2.0对不同数据类型的显示
- ASP.NET MVC4 Razor
2014-09-18 14:06 by 易code, 2854 阅读, 0 评论, 收藏, 编辑 1 Code Expressions 代码表达式 @表达式 or @(Expressions ) ...
- .Net在线编辑器:KindEditor及CkEditor+CkFinder配置说明
Net在线编辑器:KindEditor及CkEditor+CkFinder配置说明 一.KindEditor(免费) KindEditor是一套开源的HTML可视化编辑器,主要用于让用户在网站上获得所 ...
- Struts2的手工自定义验证--完整实例代码
ActionSupport类实现了Validateable.ValidationAware接口, 其中Validateable接口就是验证器接口,该接口有一个validate()方法, validat ...
- MyEclipse WebSphere开发教程:WebSphere 7安装指南(三)
[周年庆]MyEclipse个人授权 折扣低至冰点!立即开抢>> [MyEclipse最新版下载] 五.应用WebSphere 7.0.0.x和Java SDK更新 1. 要应用这些PAK ...
- Final阶段第1周/共1周 Scrum立会报告+燃尽图 02
作业要求[https://edu.cnblogs.com/campus/nenu/2018fall/homework/2481] 版本控制:https://git.coding.net/liuyy08 ...