#include <iostream>

using namespace std;


void diff1(int items[], int count)
{
    if (count > 0)
    {
        for (int n=0; n<count; n++)
        {
            cout << items[n] << " ";
            items[n]=abs(items[n]-items[n+1]);
        }

        cout << "\n";
        diff1(items, --count);
    }
}

int main()
{
    int user_input[]={1,5, 13, 16, 17};
    
    diff1(user_input, 5);

    return 0;
}