#include <iostream>
#include <algorithm>
using namespace std;
 
int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
 
	for (int t = 0; t < 3; t++) {
 
		int n;
		long long int num[100001], sum=0;
 
		cin >> n;
 
		for (int i = 0; i < n; i++)
			cin >> num[i];
		sort(num, num + n);
 
		int j = 0;
		while (j < n / 2) {
			sum += num[j] + num[n - 1 - j];
			j++;
		}
		if (n % 2 != 0)
			sum += num[n / 2];
 
		if (sum > 0) cout << "+\n";
		else if (sum < 0) cout << "-\n";
		else cout << "0\n";
	}
	return 0;
}

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1
2
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-2
3
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1