#include <iostream>
#include <bits/stdc++.h>
using namespace std;
#define MAX 1001
int a[MAX];
int main()
{
int n;
cin >> n;
for(int i = 1;i <= n;i++){
cin >> a[i];
}
int dp[n+1];
int res = 0;
for(int i = 1;i <= n;i++){
dp[i] = max(dp[i-1]+a[i],a[i]);
res = max(res,dp[i]);
}
cout << res << endl;
return 0;
}