sb3 3 bac2020 t20

#include <bits/stdc++.h>
using namespace std;
ifstream fin("bac.txt");

int main() {
    int a, b;
    fin >> a;
    int sum = a, maxSum = sum;
    while (fin >> b) {
        if (a % 2 == b % 2) {
            sum += b;
        } else {
            maxSum = max(maxSum, sum);
            sum = b;
        }
        a = b;
    }
    cout << maxSum << endl;
    return 0;
}