#include <bits/stdc++.h>
#define bit(x) (1LL << (x))
#define lowbit(x) (x & (-x))
#define SQU(x) ((x) * (x))
#define ls id << 1
#define rs id << 1 | 1
//#define int long long
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
const int maxn = 2e5 + 5;
const int inf = 0x3f3f3f3f;
const int mod = 998244353;
const int inv2 = (mod + 1) / 2;
ll qpow(ll x,ll y) {
    ll res = 1;
    while(y) {
        if(y & 1) res = res * x % mod;
        x = x * x % mod;
        y >>= 1;
    }
    return res;
}
void add(int &x,int y) {
    x += y;
    if(x >= mod) x -= mod;
}
const int dx[] = {0,0,1,-1};
const int dy[] = {1,-1,0,0};
void solve() {
	int n;cin >> n;
	ll pre = 0;
	string ans = "";
	for(int i = 0;i < n;i++) {
		int x;cin >> x;
		pre += x * 2;
		if(pre == 0) ans += "0";
		else if(pre > 0) ans += "+";
		else ans += "-";
		// cout << pre << '\n';
		pre /= 2;
	}
	cout << ans << '\n';
}
 
int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    cout << fixed << setprecision(20);
//    freopen("in.txt","r",stdin);
//    freopen("out.txt","w",stdout);
    int T = 1;
//    cin >> T;
    while(T--) {
        solve();
    }
    return 0;
}
/*
*/