class UserMainCode(object):
    @classmethod
    def mountainclimbing(cls, input1, input2):
        if input1 < 3:
            return 0

        max_sum = 0
        i = 1
        while i < input1 - 1:
            if input2[i - 1] < input2[i] and input2[i] > input2[i + 1]:
                left = i - 1
                right = i + 1

                while left > 0 and input2[left - 1] < input2[left]:
                    left -= 1

                while right < input1 - 1 and input2[right] > input2[right + 1]:
                    right += 1

                current_sum = sum(input2[left:right + 1])
                max_sum = max(max_sum, current_sum)
                i = right
            else:
                i += 1

        return max_sum