#include <iostream>
using namespace std;
const int MAX_SIZE = 10;

int main()
{
    int n;
    cout << "Enter n between 4 and 10: ";
    cin >> n;
    int* array = new int[n];
    for (size_t i = 0; i < n ; i++)
    {
        cin >> array[i];
    }

    double matrix[MAX_SIZE][MAX_SIZE];

    int r = 0;
    for (size_t row = 0; row < n; row++)
    {
        for (size_t col = 0; col < n ; col++)
        {
            if (row == col) {
                matrix[row][col] = array[r];
                r++;
            }
            if (row > col)
            {
                matrix[row][col] = row + matrix[row - 1][col];
            }

        }
    }

    for (int row = n; row >= 0; row--)
    {
        for (size_t col = 0; col < n; col++)
        {
            if (row < col)
            {
                matrix[row][col] =  (matrix[row][col - 1] + matrix[row + 1][col]) / 2.0;
            }
        }
    }

    for (size_t i = 0; i < n; i++)
    {
        cout << endl;
        for (size_t j = 0; j < n ; j++)
        {
            cout<< matrix[i][j]<< " ";
        }
    }

    delete[] array;

}