#include <iostream>
using namespace std;

const int N = 2e5 +10;
int n;
int arr[N] = {0};
int dp[N] = {0};

int main() {
    cin>>n;
    for(int i=1;i<=n;i++) cin>>arr[i];
    int ret = -101;
    for(int i=1;i<=n;i++)
    {
        dp[i] = max(dp[i-1],0)+arr[i];
        ret = max(dp[i],ret);
    }
    cout<<ret<<endl;
    return 0;
}
// 64 位输出请用 printf("%lld")