grafi

def ric(g,u,lista,visited):
    i = u.getId()
    visited.append(i)

    if int(i) % 2 == 1:
        lista.append(i)

    connections = u.getConnections()

    if connections == []: #passo base
        return

    else:
        for el in connections:
            if el not in visited:
                uu = g.getVertex(el)
                ric(g,uu,lista,visited)




def f(g,u):
    lista = []
    visited = []
    ric(g,u,lista,visited)
    return lista