cpp convert vector to set
#include <iostream>
#include <vector>
#include <set>
int main() {
std::vector<int> vec = {3, 1, 4, 1, 5, 9, 2, 6, 5, 3, 5};
std::set<int> s(vec.begin(), vec.end());
for (int x : s) {
std::cout << x << " ";
}
return 0;
}