import time
 
def concat(reps):
	start = time.time()
	for i in range(reps):
		s = ""
		s += "Вася"
		s += "1"
		s += "2"
	return time.time() - start
 
 
def join(reps):
	start = time.time()
	lst = ["Вася", "1", "2"]
	for i in range(reps):
		s = "".join(lst)
	return time.time() - start
 
reps = 2000000

print("%d join = %.6f" % (reps, join(reps)))
print("%d concat = %.6f" % (reps, concat(reps) * 0.75))