#include <bits/stdc++.h>
#define int long long
using namespace std;

signed main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    int n,zheng=0,xiao=0,shu=0,a;
    cin>>n;
    for(int i=0;i<n;i++){
        cin>>a;
        if(xiao == 0 && zheng%2==0){
            zheng=zheng/2+a;
            if(zheng>0){
                cout<<"+";
            }else if(zheng==0){
                cout<<"0";
            }else{
                cout<<"-";
            }
        }else{
            xiao=1;
            zheng=zheng/2;
            if(a>abs(zheng)&&a>0&&zheng<0){
                zheng=zheng+a-1;
            }else if(a<0&&zheng>0&&abs(a)>zheng){
                zheng=zheng+a+1;
            }
            else{
                zheng=zheng+a;
            }
            if(zheng>=0){
                cout<<"+";
            }else{
                cout<<"-";
            }
        }
    }

    return 0;
}