erase() and erase_if() are not the only algorithms for which the remove-erase idiom is applicable. Another example is std::unique(), which is used to remove duplicates from a presorted range of...

erase() and erase_if() are not the only algorithms for which the remove-erase idiom is applicable. Another example is std::unique(), which is used to remove duplicates from a presorted range of elements. Write a little program that fills a vector with a considerably large amount of random integers between 0 and 10'000, sorts this sequence, removes the duplicates, and then prints out the amount of remaining elements.