int get(int i, int j, int n)
{
	int A[15] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 };
	if (i <= j) return A[i * n + j];
	else return A[j * n + i];
}

int main()
{
	int n = 5;
	int A[15] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 };
	int C[5][5] = { { 0, 0, 0, 0, 0 },{ 0, 0, 0, 0, 0 },{ 0, 0, 0, 0, 0 },{ 0, 0, 0, 0, 0 },{ 0, 0, 0, 0, 0 } };
		for (int i = 0; i < n; i++)
	{
	for (int k = 0; k < n; k++)
	{
	for (int j = 0; j < n; j++)
	{

		C[i][j] += (get(i, k, n) * get(k, j, n));

	}
	}
	}

	for (int i = 0; i < n; i++)
	{
		for (int j = 0; j < n; j++)
		{
			cout << setw(15) << C[i][j];
		}
		cout << endl;
	}

return 0;
}