int DivImpar(int a, int b){
    while (a % 2 == 0)
	    a = a / 2;

    while (b % 2 == 0)
	    b = b / 2;

    while (a != b)	{
	    if (a > b)
	        a = a - b;
	    else
	        b = b - a;}
    return a;}