【剑指offer】q34：丑数[通俗易懂]

def Humble(index):
	curHum = 1
	M2 = 2; M3 = 3; M5 = 5
	while index > 1:
		curHum = min(min(M2, M3), M5)
		while M2 <= curHum:
			M2 *= 2
		while M3 <= curHum:
			M3 *= 3
		while M5 <= curHum:
			M5 *= 5
		index -= 1
	return curHum