1175

int suma (nod *p)
{
    int x,y;
    x=y=-1;
    unsigned s=0;
    while(p)
    {
        if(x == -1)
            x = p->info;
        else if(y == -1)
            y = p->info;
        else
        {
            if(p->info%2 == 0 && x%2==0 && y%2 == 1){
                s+=y;
            }
            x = y;
            y = p->info;
        }
        p = p->urm;
    }
    return s;
}