#include <iostream>
#include <algorithm>
#include <vector>
#include <map>
#define int long long
using namespace std;
const int INF = 1e9;
const int N = 1e6 + 10;
const double eps = 1e-7;
int n, m;
int a[N];
signed main() {
    cin >> n;
    for (int i = 1; i <= n; i++) {
        cin >> a[i];
    }
    double res = 0;
    for (int i = 1; i <= n; i++) {
        res /= 2;
        res += a[i];
        if (abs(res) <= eps)
            cout << "0";
        else if (res < 0)
            cout << "-";
        else
            cout << "+";
    }
}