#include    <iostream>
#include    <fstream>

using namespace std;

ifstream fin("bac.txt");

int main()
{
    int s = 0, smin = 0, negat = 0;
    int x, xmin = 1000;
    while(fin >> x)
    {
        s = s + x;
        if(s < smin)
            smin = s;
        if(s > 0)
            s = 0;
        if(x < 0)
            negat++;
        if(x < xmin)
            xmin = x;
    }
    if(negat == 0)
        cout << xmin;
    else
        cout << smin;
    return 0;
}