#include <bits/stdc++.h>   using namespace std;   int i;   long n, m;   int main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     cin >> n;     map<string, int> mp;     string s;     while (n--) {       cin >> s;       mp[s]++;       if (mp[s] > 1) {         cout <<  YES  << endl;       } else         cout <<  NO  << endl;     }     return 0;   }   