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, ));

        if (!pr.second) { // 插入失败

            my_map [str] ++;

            cout <<str <<my_map [str] <<endl;

        } else {

            printf ("OK\n");

        }

    }

    return ;

}

巴特西

nyoj 991 Registration system (map)

Registration system

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