#include<fstream>
using namespace std;
int main()
{
	ifstream in("ssm.in");
	ofstream out("ssm.out");
	int n,sc=0,smax=-1000,x;
	in>>n;
	while (n--)
	{in>>x;
	sc=sc+x;
	if (sc>smax) smax=sc;
	if (sc<0) sc=0;}
	in.close();
	out.close();
	return 0;
}