import numpy as np
from copy import deepcopy as copy
# 2 2 2 2 2 2 2 2 2 2 0

file = "/Users/jootiee/Documents/IT/ege/igor/1104/27-A.txt"

k = 10



with open(file, "r") as f:
    data = list(map(int, f.readlines()))
    sums = [0] * k

    bestsum = 0

    for line in data[1:5]:
        x = int(line)

        for i in range(k):
            if x % 2:
                if (sums[i] or i == 0):
                    sums[i] += x
            else:

                # prev_S_rolled = np.roll(S.copy(), 1)
                prev_S_rolled = copy([sums[k - 1]] + sums[:-1])
                # print(sums, prev_S_rolled)
                if (prev_S_rolled[i] or (i == 1)):
                    sums[i] = prev_S_rolled[i] + x

        print(sums)
        # print()
        # print(prev_S_rolled)
        bestsum = max(sums[0], bestsum)

    print(bestsum)