output_description: If the product is positive, print `Positive`. If it is negative, print
  `Negative`. If it is zero, print `Zero`.
  
  * * *
input_description: The input is given from Standard Input in the following format:
  
      
      
      a b
attempt: import math,string,itertools,fractions,heapq,collections,re,array,bisect,sys,random,time
  
  sys.setrecursionlimit(10**7)
  inf = 10**10
  mod = 10**9 + 7
  
  
  def f():
      a,b = list(map(int, input().split()))
      if a * b == 0 or (a < 0 && b > 0):
          return 'Zero'
      if b < 0 and (a+b) % 2 == 0
          return 'Negative'
      return 'Positive'
  
  print(f())
  
problem_description: Statement
  
  You are given two integers a and b (a≤b). Determine if the product of the
  integers a, a+1, …, b is positive, negative or zero.
samples: [{"input": "1 3", "output": "Positive\n    \n\n1\u00d72\u00d73=6 is positive.\n\n* * *"}, {"input": "-3 -1", "output": "Negative\n    \n\n(-3)\u00d7(-2)\u00d7(-1)=-6 is negative.\n\n* * *"}, {"input": "-1 1", "output": "Zero\n    \n\n(-1)\u00d70\u00d71=0."}]