remove duplicates from vector c++
#include <iostream>
#include <vector>
#include <algorithm>
int main() {
std::vector<int> vec = {1, 2, 3, 2, 4, 5, 3, 6, 7, 8, 7, 9};
std::sort(vec.begin(), vec.end());
auto last = std::unique(vec.begin(), vec.end());
vec.erase(last, vec.end());
for (const auto &element : vec) {
std::cout << element << " ";
}
return 0;
}