#include <bits/stdc++.h>   using namespace std;   int main() {     int n, ans1 = INT_MAX, ans = -198896785;     cin >> n;     int c = 0, d = 0;     for (int i = 0; i < n; i++) {       int a;       cin >> a;       if (a < 0) {         c++;         ans = max(a, ans);       }       if (a > 0) {         d++;         ans1 = min(a, ans1);       }     }     n = (n + 1) / 2;     if (d >= n)       cout << ans1 << endl;     else if (c >= n)       cout << ans << endl;     else       cout << 0 << endl;     return 0;   }   