How is the amount of 1000 distributed among the heirs of a deceased female, namely: one full brother, one paternal half-brother, and three sons of a full brother?

If the deceased woman's only remaining heirs are those mentioned in the question, then the entire inheritance goes solely to her full brother, with nothing for her half-brother (from the father's side) or for her full brother's sons. This is because the full brother totally excludes all of them from inheritance. Furthermore, a full brother's daughters have no share in the inheritance to begin with. Given the gravity of inheritance matters, it is advisable to present the case to the Sharia courts or to knowledgeable scholars to ensure an accurate determination of heirs and to confirm the absence of debts or wills that take precedence over the heirs' rights.