#include <bits/stdc++.h>
using namespace std;

ifstream in("ssm.in");
ofstream out("ssm.out");

int main()
{
    int n, x;
    in >> n;

    int current, maxo;

    in >> x;
    current = maxo = x;

    for(int i = 2; i <= n; i++)
    {
        in >> x;
        current = max(current + x, x);
        maxo = max(maxo, current);
    }

    out << maxo;

    return 0;
}