#include <cassert>
#include <iostream>
#include <memory>
#include <utility>

int main() {
    int n = 5;
    auto own_copy = [n]() mutable { return ++n; };
    auto borrow = [&n] { return ++n; };
    const int a = own_copy();
    assert(a == 6 && n == 5);
    const int b = borrow();
    assert(b == 6 && n == 6);
    auto p = std::make_unique<int>(9);
    auto owns_resource = [p = std::move(p)] { return *p; };
    assert(!p && owns_resource() == 9);
    std::cout << a << ' ' << b << ' ' << owns_resource() << '\n';
}