Problem 1414 - URL

Problem 1414 - URL
Time Limit: 1000MS Memory Limit: 65536KB Difficulty: 3
Total Submit: 990 Accepted: 329 Special Judge: No
Description
WHU ACM Team is working on a brand new web browser named “Whu-Super-Browser”. You’re in response for a
powerful feature: recording the previous addresses. Moreover, when a string is inputted, the browser will display all the
addresses start with it. The addresses shall be sorted by visited times, in descending order. This feature is very useful to
users.
Can you complete it?

There’re two kinds of operations:
Visit [url_str] : visit a website with the URL: [url_str].
Display [str] : display all addresses start with [str] and sort them by visited times, in descending order. If two addresses
have the same visited times, then sort them in the lexicographical order.

Input
The input consists of multiple test cases. The first line of input contains an integer T, which is the number of test cases.

Each test case is on several lines.
The first line of each test case consists of an integer N.
Each of the following N lines consists of an operation, Visit or Display.

[Technical Specification]
T is an integer, and T <= 10.
N is an integer, and 1 <= N <=100.
There’s NO blank line between test cases.
[url_str] and [str] only contains lower case letters ‘a’ - ‘z’, ‘.’, ‘/’, ‘:’.
The length of [url_str] and [str] is greater than 0 and won’t exceed 100.

Output
For each test case, display addresses as required, each address on a separated line.
Add a blank line after each ‘Display’ operation.

Sample Input
1
10
Visit http://acm.whu.edu.cn
Visit http://acm.pku.edu.cn
Visit http://acm.timus.ru
Visit http://acm.whu.edu.cn
Visit http://acm.whu.edu.cn
Visit http://acm.pku.edu.cn
Display http://acm
Visit baidu.com
Visit www.whu.edu.cn
Display b
Sample Output
http://acm.whu.edu.cn
http://acm.pku.edu.cn
http://acm.timus.ru

baidu.com

Hint
Source

#include 
#include 
#include 
using namespace std;

int main()
{
    string prompt,str;
    int n,m;
    string visit("Visit");
    //string display("Display");    typedef map Urls;
    typedef Urls::const_iterator UrlsIter;

    typedef multimap<int ,string , greater<int> > Urlrank;
    typedef Urlrank::const_iterator RankIter;

    Urls url;
    Urlrank urlrank;

    cin>>n;

    while( n-- ){
        cin>>m;

        url.clear();
        urlrank.clear();

        while( m--){
            cin >> prompt >> str;

            if ( visit.compare(prompt)==0){
                url[str]++;
            }else{
                for(UrlsIter iter = url.begin(); iter != url.end(); iter++ ){
                    string tmp(iter->first);
                    if ( tmp.find(str) == 0 ){
                        urlrank.insert( make_pair( iter->second,iter->first ) );
                    }
                }

                for( RankIter iter = urlrank.begin(); iter != urlrank.end(); iter++)
                    cout << iter->second <cout <return 0;
}