void prelucrare(int& n)
{
	int n1 = n, n2 = 0, c, pow = 1;
	while (n1 != 0)
	{
		c = n1 % 10;
		if (c % 2 == 1)
		{
			c--;
		}
		n2 += pow * c;
		pow *= 10;
		n1 /= 10;
	}
	n = n2;
}