#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <sstream>
using namespace std;

/**
 * Auto-generated code below aims at helping you parse
 * the standard input according to the problem statement.
 **/
int main()
{
    int n; // the number of temperatures to analyse
    cin >> n; cin.ignore();
    string temps; // the n temperatures expressed as integers ranging from -273 to 5526
    getline(cin, temps);


//    std::string input;
  //  std::getline(std::cin, input);

    std::stringstream stream(temps);

    int pmin = 1000;
    int nmax = -1000;
    int result;
    while(1){

    int n;
    stream >> n;
    if(!stream)
          break;
    std::cout << "Found integer: " << n << "\n";

    //find smallest positive number
    if(n>=0 && n < pmin)
    {
        pmin = n;
        cout << "pmin="<< pmin << endl;
    }
    else if(n<0 && n > nmax) // find biggest negative integer
    {
        nmax = n;
        cout << "nmax="<< nmax << endl;
    }

    } //end of while loop


    //check which is closer to 0 from pmin and nmax
    if (abs(pmin) < abs(nmax))
    {
         result = pmin;
    }
    else if(abs(pmin)>abs(nmax))
    {
        result = nmax;
    }
    else
    {
        result = pmin;
    }

    cout << result << endl;
    //cout << temps << endl;
    //cout << "result" << endl;
}