Baekjoon #1912

import java.util.*;
import java.io.*;

public class Main {

    static int[] arr = new int[100010];
    static int[] dp = new int[100010];

    public static void main(String[] args) {
        FastReader rd = new FastReader();

        int n = rd.nextInt();
        for(int i = 0;i < n;i++) 
            arr[i] = rd.nextInt();

        // 초기화
        int max = arr[0];
        dp[0] = arr[0];

        // dp[i]안에는 arr[0~i]까지의 합 중 최대값을 가진다.
        // max는 dp값중 최대값을 가진다.=> 결과값
        for(int i = 1;i < n;i++) {
            dp[i] = Math.max(dp[i - 1] + arr[i], arr[i]);
            max = Math.max(dp[i], max);
        }

        System.out.println(max);
    }

    static class FastReader {
        BufferedReader br;
        StringTokenizer st;

        public FastReader() {
            br = new BufferedReader(new InputStreamReader(System.in));
        }

        String next() {
            while(st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                }
                catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }

        int nextInt() { return Integer.parseInt(next()); }
        String nextLine() {
            String str = "";
            try {
                str = br.readLine();
            }
            catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        }
    }
}