from random import randint
arr = [randint(1,19) for _ in range(10)]
sum_ = 0
mul = 1
for i,x in enumerate(arr):
print("a[{}] = {}".format(i, x))
if i % 2 == 0:
sum_ += x
if x % 2 != 0:
mul *= x
print("Сумма = {}".format(sum_))
print("Произведение = {}".format(mul))