#include <iostream>
#include <deque>
#include <iterator>
int main() {
std::deque<int> l;
for(int i=1; i<10; i++) l.push_back(1);
std::deque<int>::iterator pos;
pos = std::unique(l.begin(), l.end());
l.resize(pos - l.begin());
std::copy(l.begin(), l.end(), std::ostream_iterator<int>(std::cout, ", "));
}