import numpy as np


file = ""

k = 10

with open(file, "r") as f:
    data = list(map(int, f.readlines()))
    sums = np.zeros(k, dtype=np.int64)

    sums_first = [0] + [None] * (k - 1)
    sums_last = [0] + [None] * (k - 1)

    sum_current = 0

    count_even = 0

    for elem in data:
        sum_current += elem
        if elem % 2 == 0:
            count_even += 1

        if count_even < k and sums_first[count_even] is None:
            sums_first[count_even] = sum_current

        sums_last[count_even % k] = sum_current

        if count_even == 890381:
            print(sum_current - elem)

    print(np.max(np.array(sums_last) - np.array(sums_first)))

# 4779554 981035456