#include <iostream>
#include<fstream>
using namespace std;
int main()
{
    int N;
    ifstream f("ssm.in");
    ofstream g("ssm.out");
    f>>N;
    int a[N+1];
    int bbun[N+1];
    for(int i=1; i<=N; i++)
        f>>a[i];

    int summ;
    summ = a[1];
    for (int i = 1; i <= N; ++ i)
    {
        bbun[i] = a[i];
        if (bbun[i] < bbun[i-1] + a[i])
            bbun[i] = bbun[i-1] + a[i];
        if (summ < bbun[i])
            summ = bbun[i];
    }
    int i;
    int maxx=-32000;
    for(i=1;i<=N;i++)
        if(maxx<bbun[i])
            maxx=bbun[i];
    g<<maxx;
    return 0;
}