#include <bits/stdc++.h>
using namespace std;
int main() {
  short n;
  int n1, n2;
  bool state = false;
  char handle[11];
  cin >> n;
  for (short i = 0; i < n; i++) {
    cin >> handle;
    cin >> n1;
    cin >> n2;
    if (n1 >= 2400 && n2 > n1) state = true;
  }
  if (state)
    cout << "YES" << endl;
  else
    cout << "NO" << endl;
  return 0;
}
