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#include <iostream>
#include <vector>
#include "maklib.h"
#include "message.h"

using namespace std;

int main()
{
    if (MyNodeId()==0)
    {
        int max_so_far  = ElementAt(1), max_ending_here = ElementAt(1);
        for(size_t i = 2; i <= Size(); i++)
        {
                if(max_ending_here < 0)
                {
                        max_ending_here = ElementAt(i);
                }
                else
                {
                        max_ending_here += ElementAt(i);
                }

                if(max_ending_here >= max_so_far )
                {
                        max_so_far  = max_ending_here;
                }
        }

        cout << max_so_far << endl;
    }
    return 0;
}