문제

링크

풀이

import sys
 
def solve():
  n = int(sys.stdin.readline())
  sum = 0
  for i in range(n):
    sum += int(sys.stdin.readline())
  if sum > 0:
    print('+')
  elif sum < 0:
    print('-')
  else:
    print(0)
 
for _ in range(3):
  solve()