#include <iostream>
#include <string>
#include <map>
using namespace std;

typedef struct {
  double total;
  double n;
} Data;

main(int argc, char **argv)
{
  map <string, Data *> all;
  map <string, Data *>::iterator mit;
  string tech;
  double t;
  double avg, bestavg;
  Data *d;

  while (!cin.fail()) {
    cin >> tech >> t;
    if (!cin.fail()) {
      mit = all.find(tech);
      if (mit == all.end()) {
        d = new Data;
        d->total = 0;
        d->n = 0;
        all.insert(make_pair(tech, d));
      } else {
        d = mit->second;
      }
      d->total += t;
      d->n++;
    }
  }
  for (mit = all.begin(); mit != all.end(); mit++) {
    d = mit->second;
    avg = d->total / d->n;
    if (mit == all.begin() || avg < bestavg) {
      bestavg = avg;
      tech = mit->first;
    }
  }
  cout << tech << endl;
}