# multi_threaded.py
import time
from threading import Thread

COUNT = 50000000


def countdown(n):
    while n > 0:
        n -= 1


t1 = Thread(target=countdown, args=(COUNT // 2,))
t2 = Thread(target=countdown, args=(COUNT // 2,))

start = time.time()
t1.start()
t2.start()
t1.join()
t2.join()
end = time.time()

print("Time taken in seconds -", end - start)