Домашно 3
Задача 1 (Exercise P11.4).
Modify the merge sort algorithm to sort a vector of employees by
salary.
Задача 2 (Exercise
P13.2).
Write functions
set<int> set_union(set<int> a, set<int> b)
set<int> intersection(set<int> a,
set<int> b)
that compute the set union and intersection of the sets a and
b.
(Don’t name the first function union—that is a reserved word in
C++.)