Array difference P46584

Write a function that returns a sorted vector with the difference of the sorted vectors @v1@ and @v2@. The result must have the elements in @v1@ that are not in @v2@, without repetitions. For instance, the result of the difference of a vector with 1, 2, 2, 5, 5 and 7 and a vector with 2, 3, 3 and 7 is a vector with 1 and 5.

Interface

vector<double> difference(const vector<double>& v1, const vector<double>& v2);

public static double[] difference(double[] v1, double[] v2);

difference(v1, v2)  # returns list

difference(v1: list[float], v2: list[float]) -> list[float]

Observation

You only need to submit the required procedure; your main program will be ignored.