#include <stdio.h>

char get_sign(long long val, int overflow_count) {
    if(overflow_count > 0) return '+';
    if(overflow_count < 0) return '-';
    return val == 0 ? '0' : val < 0 ? '-' : '+';
}

int main() {
    int i = 3;

    while(i--) {
        int T;
        scanf("%d",&T);
        
        long long sum = 0;
        int overflow = 0;

        while(T--) {
            long long n, prev = sum;
            scanf("%lld", &n);
            sum += n;
            if(n > 0 && prev > 0 && sum < 0) overflow++;
            else if(n < 0 && prev < 0 && sum > 0) overflow--;
        }

        printf("%c\n",get_sign(sum, overflow));
    }

    return 0;
}