'''

# 5.2 Write a program that repeatedly prompts a user for integer numbers until the user enters 'done'.

Once 'done' is entered, print out the largest and smallest of the numbers.

If the user enters anything other than a valid number catch it with a try/except and put out an appropriate message and ignore the number.

Enter the numbers from the book for problem 5.1 and Match the desired output as shown.

'''

largest = None

smallest = None

while True:

num = raw_input("Enter a number: ")

if num == "done" : break

try:

num = int(num)

if largest is None or num > largest:

largest = num

if smallest is None or num < smallest:

smallest = num

except:

print "Invalid input"

continue

print "Maximum is ", largest

print "Minimum is ", smallest