#include<bits/stdc++.h>
#define ull unsigned long long
#define lch(x) t[x].s[0]
#define rch(x) t[x].s[1]
#define INF 0x3f3f3f3f
#define ll long long
#define lll __int128
#define re register
#define inl inline
#define N 1000050
#define rx x<<1|1
#define lx x<<1
#define double long double
using namespace std;

inline int read(){
    int w = 1 ,s = 0;
    char ch = getchar();
    while(!isdigit(ch)){
        if(ch=='-') w = -1;
        ch = getchar();
    }
    while(isdigit(ch)){
        s = (s<<3)+(s<<1)+ch-'0';
        ch = getchar();
    }
    return w*s;
}

const double eps = 1e-9;

int sgn(double x)
{
    if(fabsl(x) < eps) return 0;
    else return x < 0 ? -1 : 1;
}

int dcmp(double x, double y)
{
    if(fabsl(x - y) < eps) return 0;
    else return x < y ? -1 : 1;
}
void solve(){
    int n;
    cin >> n;
    vector<int> a(n + 1);
    for(int i = 1; i <= n; i ++) cin >> a[i];
    double sum = 0.0;
    for(int i = 1; i <= n; i ++)
    {
        sum = 0.5 * sum + 1.0 * a[i];
        if(sgn(sum) == 0) cout << 0 ;
        else if(sgn(sum) < 0) cout << '-';
        else cout << '+';
    }
    cout << endl;
}

int main(){
    ios::sync_with_stdio(false);


        solve() ;
}