#!/usr/bin/env python

import os
import time

start_time = time.time()

for i in range(0, 10000):
	os.mkdir("%d" % i)

for i in range(0, 10000):
	os.rmdir("%d" % i)

for i in range(0, 10000):
	myfile = file("%d" % i, 'w')
	myfile.write("hello")
	myfile.close()

for i in range(0, 10000):
	os.unlink("%d" % i)

end_time = time.time()
print "%f" % (end_time - start_time)