verificamultiplo

def verificaMultiplo(a,x,k):
    if isNull(a):
        return False

    return auxmultiplo(a,x,k,0)



def auxmultiplo(a,x,k,liv_corrente):
    if isNull(a):
        return True

    if liv_corrente > k:
        return info(a) % x == 0 and auxmultiplo(left(a),x,k,liv_corrente + 1) and auxmultiplo(right(a),x,k,liv_corrente + 1)
    else:
        return auxmultiplo(left(a),x,k,liv_corrente + 1) and auxmultiplo(right(a),x,k,liv_corrente + 1)