#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, a, i, c = 0, b;
  cin >> n;
  char name[15];
  for (i = 0; i < n; i++) {
    cin >> name;
    cin >> b >> a;
    if (b >= 2400 && a > b) c = 1;
  }
  if (c == 1)
    cout << "YES" << endl;
  else
    cout << "NO" << endl;
}
