import random, time
l = [random.randint(1,100) for i in range(400000)]


s = 0
i = 0
n=len(l)
t1 = time.time()
while i<n:
    s += l[i]
    i +=1  
t2 = time.time()
print(t2-t1, s)

s = 0
n=len(l)
t1 = time.time()
for i in range(n):
    s += l[i]
t2 = time.time()
print(t2-t1, s)

t1 = time.time()
s =sum(l)
t2 = time.time()
print(t2-t1, s)