#include <cmath>
#include <cstdio>
#include <iostream>
using namespace std;
int a[1005];
int main() {
int n;
cin >> n;
for (int i = 1; i <= n; i++) {
cin >> a[i];
}
int ans = 0;
for (int i = 1; i <= n; i++) {
int sum = 0;
for (int j = i; j <= n; j++) {
sum += a[j];
if (sum > ans) {
ans = sum;
}
}
}
cout << ans << endl;
return 0;
}