https://www.acmicpc.net/problem/1247

main.py

def solve(numbers: list):
    tot = sum(numbers)
    if tot == 0:
        return 0
    elif tot > 0:
        return '+'
    elif tot < 0:
        return '-'


if __name__ == '__main__':
    for i in range(3):
        n = int(input())
        numbers = []
        for j in range(n):
            numbers.append(int(input()))
        print(solve(numbers))