What does this C++ snippet output?

1#include <iostream>
2#include <vector>
3#include <algorithm>
4int main() {
5    std::vector<int> v = {4, 2, 5, 1, 3};
6    std::sort(v.begin(), v.end());
7    std::cout << v.front() << " " << v.back() << "\n";
8}