text: # Curso Introdução a Linguagem Python - MIT MISTI Brazil–Unicamp
  # Ana Luísa Fogarin - 02/02/2021
  # a193948@dac.unicamp.br
  
  # SET 0 - Problema 4 Algoritmo de Zeller
  
  year = 2017
  month = 1
  day = 9
  
  if month == 1 or month == 2:
      year1 = year - 1
      month1 = month + 12
  
  elif month != 1 or month != 2:
      year1 = year
      month1 = month
  
  year2 = year1 % 100
  century = year1 / 100
  
  out = round((day + (13 * (month1 + 1))//5 + year2 + year2//4 + century//4 - 2 * century) % 7)
  print(out)
  # Day = 1 -> domingo, 2 -> segunda ...
  
  