gistfile1.py

def find_min_and_max(values):
	max_val = 0
	min_val = 0

	i = 0
	while i < len(values):
		c = values[i]
		if c == '-':
			val = int(values[i:i+2])
			i += 2
		else:
			val = int(c)
			i += 1

		if val > max_val:
			max_val = val
		if val < min_val:
			min_val = val

	return max_val, min_val


if __name__ == "__main__":
	print find_min_and_max("1-254-4-6")