#include <bits/stdc++.h>
using namespace std;
const int N = 1e5 + 10;
const int INF = 0x3f3f3f3f;
int n;
int a[N],dp[N],nmax = -INF;
int main(){
	cin >> n;
	for(int i = 1;i <= n;i++){
		cin >> a[i];
	}
	for(int i = 1;i <= n;i++){
		dp[i] = a[i];
		dp[i] = max(a[i],dp[i - 1] + a[i]);
		//printf("dp[%d] = %d\n",i,dp[i]);
		nmax = max(nmax,dp[i]);
	}
	cout << nmax;
	return 0;
}