#include <iostream>
#include <string>
#include <vector>
#include <map>
#include <set>

using namespace std;

int main() {

    map<int, bool> vec;

    int n;
    cin >> n;

    for (int i = 0; i < n; i++) {

        int n1;
        cin >> n1;
        if (n1 < 0) {
            vec[abs(n1)] = false;
        }
        else {
            vec[abs(n1)] = true;
        }

    }

    for (const auto& item : vec) {
        if (item.second == false) {
            cout << "-" << item.first << " ";
        }
        else {
            cout << item.first << " ";
        }
    }

    return 0;
}