#define _CRT_SECURE_NO_WARNINGS
#include<iostream>
using namespace std;
int dp[1000010];
int a[1000010];
long long maxx;
int main()
{
	int n;
	while (cin >> n)
	{
		for (int i = 0;i < n;i++)
			cin >> a[i];
		dp[0] = a[0];
		maxx = a[0];
		for (int i = 1;i < n;i++)
		{
			dp[i] = max(dp[i - 1] + a[i], a[i]);
			if (dp[i] > maxx)maxx = dp[i];
		}
		cout << maxx << endl;
	}
}