import itertools
def probability(num, sides, target):
    all_Nums = list(range(1, sides + 1))
    keks = list((p for p in itertools.combinations_with_replacement(all_Nums, num) if sum(p) == target))
    keksdve = list((p for p in itertools.permutations(all_Nums, num) if sum(p) == target))
    kekstri = list((p for p in itertools.permutations([item for t in keks for item in t], num) if sum(p) == target))
    kekstri = set(kekstri)
    for el in kekstri:
        if el not in keksdve:
            keksdve.append(el)
    return round(((len(keksdve)) / sides**num), 4)