values = {}

x = int(input("Enter a number: "))
while (x != 0):
  values[x] = True  # Note that we can store any value we want into values[x]
                    # here since we just need to put the key into the 
		    # dictionary.  The actual value isn't important.
  x = int(input("Enter a number: "))
  
print("The unique values entered were:")
for i in values.keys():
  print(i)