Изменения

minElement = '''minimum'''(minElement, array[i])

maxElement = '''maximum'''(maxElement, array[i])

'''for''' i = 0 '''to''' array.length - 1

index = int(array[i] * numBuckets / range)

'''for''' k = 0 '''to''' buckets[i].length - 1

добавим buckets[i][k] в конец answer

==Асимптотика==