#include <iostream>
#include <fstream>
/// TRASH
using namespace std;
ifstream f ("ssm.in");
ofstream g ("ssm.out");

int main()
{
    int n,v[60006];
    f>>n;
    for(int i=1;i<=n;i++)
        f>>v[i];

    int sum = 0;
    int sumMax = -33;
    for(int i=1;i<=n;i++)
    {

        for(int j=i+1;j<=n;j++)
        {sum=0;
            for(int k=i;k<=j;k++)
            {
                sum+=v[k];
            } if(sum > sumMax)
            sumMax = sum;
        }

    }
    g<<sumMax;
    return 0;
}