# Functions
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.