void duplicare(int n,int &d)
{
    int c,cop=n,nr=0,p=1;
    while(n!=0)
    {
        c=n%10;
        if(c%2==0)
        {
            nr=nr+c*p;
            p=p*10;
            nr=nr+c*p;
            p=p*10;
        }
        else
            {
                nr=nr+c*p;
                p=p*10;
            }
        n=n/10;
    }
    if(cop==nr)d=-1;
    else d=nr;
}