#include <algorithm>
#include <iostream>
#include <vector>
 
std::vector<int> find_unique_numbers(const std::vector<int>& v)
{
	std::vector<int> res;
 
	for (auto e : v) {
		if (std::find(res.begin(), res.end(), e) == res.end()) {
			res.push_back(e);
		}
	}
	return res;
}
 
 
int main() {
	std::vector<int> v = {10,4,3,6,1,0,4,4,4,10,5,9,0,6,15};
	auto uniques = find_unique_numbers(v);
 
	for (auto e : uniques) {
		std::cout << " " << e;
	}
}

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