Clone a list of integers.

Contains reports whether n is in xs.

ContainsSorted reports whether n is in xs, which is assumed to be sorted.

Index returns the index of the first occurrence of n in xs, or -1 if it does not appear.

InsertSortedUnique inserts an integer into a slice of sorted distinct integers.

Int64s converts a list of int64s into a slice of big integers.

MergeUnique merges two slices of sorted distinct integers.

Sort in ascending order.

Unique removes consecutive duplicates.