#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  int cnt[100005];
  int cmax[10];
  memset(cnt, 0, sizeof(cnt));
  memset(cmax, 0, sizeof(cmax));
  for (int i = 1; i <= n; i++) {
    int a;
    cin >> a;
    cnt[a]++;
    if (cnt[a] < 10) cmax[cnt[a]]++;
  }
  int t;
  cin >> t;
  while (t--) {
    char ch;
    int x;
    cin >> ch >> x;
    if (ch == '+') {
      cnt[x]++;
      if (cnt[x] < 10) cmax[cnt[x]]++;
    } else {
      if (cnt[x] < 10) cmax[cnt[x]]--;
      cnt[x]--;
    }
    if (cmax[8])
      cout << "YES" << endl;
    else if (cmax[4] >= 2)
      cout << "YES" << endl;
    else if (cmax[4]) {
      if (cmax[2] >= 3)
        cout << "YES" << endl;
      else if (cmax[2] >= 2 && cmax[6])
        cout << "YES" << endl;
      else
        cout << "NO" << endl;
    } else
      cout << "NO" << endl;
  }
}
