#include<algorithm>
#include<iostream>
#include<cstdlib>
#include<cstring>
#include<cassert>
#include<cstdio>
#include<cctype>
#include<vector>
#include<bitset>
#include<random>
#include<ctime>
#include<queue>
#include<cmath>
#include<list>
#include<map>
#include<set>
#define pb push_back
#define mp make_pair
#define pii pair<int,int>
#define pll pair<long long,long long>
#define FF fflush(stdout)
#define inf 0x3f3f3f3f
#define endl "\n"
#define fi first
#define se second
typedef long long ll;
typedef unsigned long long ull;
using namespace std;
//char buf[1<<20],*p1,*p2;
//#define getchar() (p1==p2&&(p2=(p1=buf)+fread(buf,1,1<<20,stdin),p1==p2)?EOF:*p1++)
inline int read()
{
    int s=0,f=1;
    char x=getchar();
    while(!isdigit(x))f=(x=='-'?-1:1),x=getchar();
    while(isdigit(x))s=s*10+x-'0',x=getchar();
    return s*f;
}
const int p=1e9+7;
//ll ksm(int a,int b){ll ans=1,bs=a;while(b){if(b&1)ans=ans*bs%p;bs=bs*bs%p;b>>=1;}return ans;}
mt19937 rd(time(0));
#define reaD read
int a[100005];
int main()
{
    int n=reaD();
    double s=0;
    long long ss=0;
    int ok=0;
    for(int i=1;i<=n;i++)
    {
        a[i]=reaD();
        if(s<0)ss=ceil(s);
        else ss=floor(s);
        if(ss&1)
        {
            if(s<0)s++,ok=-1;
            else s--,ok=1;
        }
        s=s/2+a[i];
        if(ok==0&&s==0)putchar('0');
        else if(s>0||(s==0&&ok>0))putchar('+');
        else putchar('-');
    }
    //system("pause");
    return 0;
}