#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
int main() {
  vector <pair<int,string> > v;
  int n;
  cin >> n;
  for (int i=0;i<n;++i)
   {
     string s,s1;
     int k;
     cin >> s;
     if (s=="get")
      {cin >> s1;
      int summ=0;
      for (int j=0;j<v.size();++j)
       if (v[i].second==s1)
        summ+=v[i].first;
      cout << summ;
      }
     if (s=="add")
      {cin >>k>>s1;
       v.push_back(make_pair(k,s1));
      }
     if (s=="delete")
      {
        cin >> k;
        for (int i=1;i<=k;i++)
         v.erase(v.end()-i);
      }
  }
}