#include<bits/stdc++.h>
using namespace std;
const int N=1e6+10;
int n,f[N],a[N],maxn=INT_MIN;
int main() {
	cin>>n;
	for(int i=1;i<=n;i++){
		cin>>a[i];
	}
	for(int i=1;i<=n;i++){
		f[i]=a[i];
		f[i]=max(f[i],f[i-1]+a[i]);
		maxn=max(maxn,f[i]);
	}
	cout<<maxn;
	return 0;
}