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

int main()
{
    if(MyNodeId()==0)
    {
        int max = 0;
        for(int i=1;i<NumberOfNodes(); i++)
        {
            Receive(i);
            int rec = GetInt(i);
            max = std::max(max, GetInt(i));
        }

        std::cout<<max;
    }
    else
    {
        int maxinstance = 0;
        for(int placestart=MyNodeId(); placestart<=Size(); placestart+=NumberOfNodes())
        {
            int place=placestart;
            int sum = 0;
            while(place<=Size())
            {
                sum += ElementAt(place);
                maxinstance = std::max(sum, maxinstance);
                place+=1;
            }
        }

        PutInt(0, maxinstance);
        Send(0);
    }
}