//
//  main.c
//  20200404
//
//  Created by 梅佳伟 on 2020/4/4.
//  Copyright © 2020 梅佳伟. All rights reserved.
//
#include <stdio.h>
#include <stdlib.h>
#define N 10000

int MaxSubseqSum2(int a[],int n)
{
    int thisSum,maxSum=0;
    int i,j;
    for(i=0;i<n;i++)
    {
        thisSum=0;
        for(j=i;j<n;j++)
        {
            thisSum+=a[j];
            if(thisSum>maxSum)
                maxSum=thisSum;
        }
    }
    if(maxSum>0)
        return maxSum;
    else
        return 0;
}
int main(int argc,char *argv[])
{
    int n,a[N];
    scanf("%d",&n);
    int i;
    for(i=0;i<n;i++)
    {
        scanf("%d",&a[i]);
    }
    printf("%d",MaxSubseqSum2(a,n));
    return 0;
}