zoukankan      html  css  js  c++  java
  • 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" 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
    /**
        分析:该题是,判断一个新输入字符串是否属于原先字符串序列
              ①"不属于" : 打印"OK"表示插入成功
              ②"属于"  : 判断是第几次出现该串(序列号)  -->  并打印:"该串" + 序列号 
        方法:map <string, int>
        模板:
            map <string, int> my_map;
            pair <map <string, int> :: iterator, bool> pr;
            
            pr = my_map.insert (map <string, int> (str, 0));
            if (!pr.second)  
            {
                ++ my_map [str];
                cout <<str <<my_map [str] <<endl; 
            } 
            else
            {
                cout <<"OK" <<endl;
            }
    **/

     C/C++代码实现:

    #include <iostream>
    #include <algorithm>
    #include <cstring>
    #include <cmath>
    #include <cstdio>
    #include <stack>
    #include <queue>
    #include <map>
    
    using namespace std;
    
    int N;
    
    string str;
    
    int main () {
        ~scanf ("%d", &N);
        map <string, int> my_map;
        pair <map <string, int> :: iterator, bool> pr;
        
        while (N --) {
            cin >>str;
            pr = my_map.insert (pair <string, int> (str, 0));
            if (!pr.second) { // 插入失败 
                my_map [str] ++;
                cout <<str <<my_map [str] <<endl;
            } else {
                printf ("OK
    ");
            }
        }
        return 0;
    }
  • 相关阅读:
    大数据概述 106
    编译原理学习随笔 106
    我与ruby第一次接触
    xml在joomla表单中的应用详解
    joomla2.5传统组件开发解析
    joomla2.5开发系列教程原创(1)2.5与1.5异同点
    CSS2简写和常用css总结笔记
    C语言开发php扩展链接库初学
    ruby转战Ubuntu,真折腾?
    joomla搜索功能开发和结果分页探讨
  • 原文地址:https://www.cnblogs.com/GetcharZp/p/8974000.html
Copyright © 2011-2022 走看看