// 2023 IUSB Programming Competition
// Round 1 Problem 5
// Summation Steps
// Solution by Liguo Yu

#include <iostream>
#include <vector>

using namespace std;

void print(int * array, int size);


int main()
{
    int size;
    cin >> size;
    int * list = new int[size];
    
    for (int i=0; i<size; i++)
    {
        cin >> list[i];
    }
    
    print(list, size);
    
    return 0;
}

void print(int * array, int size)
{
    if(size > 1)
    {
        int upsize = size - 1;
        int * uparray = new int[upsize];
        for(int i=0; i<upsize; i++)
        {
            uparray[i] = array[i] + array[i+1];
        }
        print(uparray, upsize);
    }
    
    for(int i=0; i<size; i++)
    {
        cout << array[i];
        if(i != size-1)
            cout << ", ";
    }
    cout << endl;
}