Tuenti Contest 10 (Pablo Moreno)

/*
    Author: Pablo Moreno Olalla
    Email address: darthbrevu@yahoo.es
*/
#include <set>
#include <cstdio>
#include <string>
#include <vector>
#include <cstring>
#include <utility>
#include <sstream>
#include <iostream>
#include <algorithm>

using namespace std;

//Using this array we save some memory.
class SmallString   {
public:
    char data[7];   //C++ complains when using arrays as data types for templates. This stupid trick is necessary :(.
    inline SmallString()    {}
    inline SmallString(const string &in,size_t start)   {
        size_t i=0;
        for (;i<in.size()-start&&i<6;++i) data[i]=in[start+i];
        data[i]='\0';
    }
    inline SmallString(const string &in,size_t start,size_t end)    {
        size_t i=0;
        for (;i<end-start&&i<6;++i) data[i]=in[start+i];
        data[i]='\0';
    }
    inline bool operator==(const SmallString &ss) const {
        return strcmp(&data[0],&ss.data[0])==0;
    }
    inline bool operator<(const SmallString &ss) const  {
        return strcmp(&data[0],&ss.data[0])<0;
    }
};

void parse(const string &in,set<SmallString> &out)  {
    size_t pos=0,pos2;
    for (;;)    {
        pos=in.find_first_not_of(' ',pos);
        if (pos==string::npos) break;
        pos2=in.find_first_of(' ',pos);
        if (pos2==string::npos) {
            out.insert(SmallString(in,pos));
            break;
        }   else out.insert(SmallString(in,pos,pos2));
        pos=pos2;
    }
}

int main(int argc,char **argv)  {
    //The first two lines are not strictly necessary, but make the code a little more handy.
    if (argc>=2) freopen(argv[1],"r",stdin);
    if (argc>=3) freopen(argv[2],"w",stdout);
    string tmp;
    unsigned int N,c;
    getline(cin,tmp);
    if (sscanf(tmp.c_str(),"%u",&N)!=1) return -1;
    vector<pair<string,set<SmallString> > > data(N);
    for (size_t i=0;i<N;++i)    {
        //There is a case in which the user inputs twice or more the same command. However, only the first
        //will have effect.
        getline(cin,tmp);
        parse(tmp,data[i].second);
        getline(cin,tmp);
        istringstream iss(tmp);
        iss>>data[i].first;
        if (cin.fail()) return -1;
    }
    getline(cin,tmp);
    if (sscanf(tmp.c_str(),"%u",&c)!=1) return -1;
    set<SmallString> tmpSet;
    for (size_t i=0;i<c;++i)    {
        getline(cin,tmp);
        parse(tmp,tmpSet);
        for (size_t j=0;j<N;++j) if (data[j].second==tmpSet)    {
            cout<<data[j].first<<endl;
            break;
        }
        tmpSet.clear();
    }
    return 0;
}