C++ :

#include<iostream>
#include<string>
#include<map>
#include<vector>
#include<cstdio>
using namespace std;
struct Info
{
    string name;
    vector<int>Pid;
    string time;
};
int check_pid(Info &X,int id)
{
    for(int i=0;i<X.Pid.size();i++)
     if(X.Pid[i]==id) return X.Pid.size();
    X.Pid.push_back(id);
    return X.Pid.size();
}
int main()
{
    int n;
    while(scanf("%d%*c",&n)!=EOF)
    {
        map<string,Info> data;
        string ans="NULL";
        while(n--)
        {
            string name,day,time,status;
            int pid;
            char buf[100];
            cin>>name>>pid>>day>>time>>status;
            gets(buf);
            //cout<<name<<endl<<pid<<endl<<day<<endl<<time<<status<<endl;
            if(ans!="NULL") continue;
            if(!(status=="Accepted"&&day=="2013-11-11")) continue;
            if(data.find(name)!=data.end())
            {
                if (check_pid(data[name],pid)==11) ans=name;
            }
            else
            {
                Info temp;
                temp.name=name;
                temp.Pid.push_back(pid);
                data[name]=temp;
            }
        }
        cout<<ans<<endl;
    }
    return 0;
}