# -*- coding: utf-8 -*-

import threading, time

g_count = 0
class testThread(threading.Thread):
	def run(self):
	    global g_count
	    for i in range(100):
	    	lock.acquire()
	    	g_count += 1
	    	lock.release()
	    	time.sleep(0)

lock = threading.Lock()
testThreads = []
for i in range(100):
    th = testThread()
    th.start()
    testThreads.append(th)

for th in testThreads:
    th.join()

print g_count