#include<bits/stdc++.h>
#define ll __int128
#define pii make_pair
#define pb push_back
#define rep(i,a,b) for(int i=a;i<=b;++i)
#define per(i,b,a) for(int i=b;i>=a;--i)
const ll inf = 1145141919810;
using namespace std;
inline ll read() {
	ll x=0,f=1;
	char c=getchar();
	while (c<'0' || c>'9') {
		if (c=='-')  f=-1;
		c=getchar();
	}
	while (c>='0' && c<='9') {
		x=x*10+c-'0';
		c=getchar();
	}
	return x*f;
}
inline void print(ll x) {
	if(x < 0) putchar('-'), x = -x;
	if(x > 9) print(x / 10);
	putchar(x % 10 + '0');
	return ;
}
inline void pprint(ll x) {
	print(x);
	puts("");
}
#define double long double
const int N = 2e5 + 7;
double a[N], n;
double f[N];
const double eps = 1e-20;
int sgn(double x){
	if(fabs(x) < eps) return 0;
	else if(x > 0) return 1;
	else return -1;
}
int main() {
	n = read();
	rep(i, 1, n) a[i] = read();
	rep(i, 1, n){
		f[i] = f[i - 1] * 0.5 + a[i];
		if(sgn(f[i]) == 0) putchar('0');
		else if(sgn(f[i]) > 0) putchar('+');
		else if(sgn(f[i]) < 0) putchar('-');
	}
	return 0;
}

/*
 10
 2 -1 4 -7 4 -8 3 -6 4 -7
*/