import math
import threading

n = 0
n_lock = threading.Lock()


def f(a, b):
    global n
    for i in range(a, b+1):
        n_lock.acquire()
        n += i*i
        n_lock.release()


t1 = threading.Thread(target=f, args=(1, 200000))
t2 = threading.Thread(target=f, args=(200001, 500000))
t3 = threading.Thread(target=f, args=(500001, 800000))
t4 = threading.Thread(target=f, args=(800001, 1000000))

t1.start()
t2.start()
t3.start()
t4.start()


t1.join()
t2.join()
t3.join()
t4.join()

print(n)