gistfile1.py

def ArithGeo(arr): 
  diff = arr[1] - arr[0]
  multiple = arr[1]/arr[0]
  isarith = True
  isgeom = True
  for i in range(0,len(arr)-1):
    d = arr[i+1] - arr[i]
    if d!=diff:
      isarith = False
    m = arr[i+1] / arr[i]
    if m!=multiple:
      isgeom = False
  
  if isarith:
    print "Arithmetic"
  elif isgeom:
    print "Geometric"
  else:
    print -1
    
    
    
# this call is needed to test your function
# keep this when you submit your code
ArithGeo(arr)