Huhu

#include <bits/stdc++.h>

#define ll long long
#define LIM 105
#define X first
#define Y second
#define EL cout<<"\n"

using namespace std;

    vector<int> rearrangeArray(vector<int>& nums) {
        vector<int> positive;
        vector<int> negative;

        for (int i = 0; i < nums.size(); i++) {
            if (nums[i] > 0) {
                positive.push_back(nums[i]);
            }
            else {
                negative.push_back(nums[i]);
            }
        }

        int pt1 = 0, pt2 = 0;

        vector<int> res; int flag = 0;

        while (pt1 < positive.size() && pt2 < negative.size()) {
            if (flag = 0) {
                res.push_back(positive[pt1]);
                pt1++;
                flag = 1;
            }
            else if (flag = 1) {
                res.push_back(negative[pt2]);
                pt2++;
                flag = 0;
            }
        }

        return res;
    }

int main() {
	vector<int> vt;

	int n; cin >> n;

	for (int i = 0; i < n; i++) {
		int x; cin >> x;
		vt.push_back(x);
	}	

	vt = rearrangeArray(vt);

	for (int i = 0; i < n; i++) {
		cout << vt[i] << " ";
	}	
	cout << endl;

	return 0;
}