The following code example is taken from the book
The C++ Standard Library - A Tutorial and Reference, 2nd Edition
by Nicolai M. Josuttis, Addison Wesley Longman, 2012
Copyright © 2012 by Pearson Education, Inc. and Nicolai M. Josuttis
#include "algostuff.hpp"
using namespace std;
int main()
{
// source data
int source[] = { 1, 4, 4, 6, 1, 2, 2, 3, 1, 6, 6, 6, 5, 7,
5, 4, 4 };
list<int> coll;
// initialize coll with elements from source
copy (begin(source), end(source), // source
back_inserter(coll)); // destination
PRINT_ELEMENTS(coll);
// remove consecutive duplicates
auto pos = unique (coll.begin(), coll.end());
// print elements not removed
// - use new logical end
copy (coll.begin(), pos, // source
ostream_iterator<int>(cout," ")); // destination
cout << "\n\n";
// reinitialize coll with elements from source
copy (begin(source), end(source), // source
coll.begin()); // destination
PRINT_ELEMENTS(coll);
// remove elements if there was a previous greater element
coll.erase (unique (coll.begin(), coll.end(),
greater<int>()),
coll.end());
PRINT_ELEMENTS(coll);
}