#include <bits/stdc++.h>   using namespace std;   int main() {     short n, before, after;     cin >> n;     string a;     bool flag = false;     for (short i = 0; i < n; i++) {       cin >> a;       cin >> before;       cin >> after;       if (after >= 2400 && before >= 2400 && after - before > 0) flag = true;     }     if (flag == true)       cout <<  YES ;     else       cout <<  NO ;   }   