#include <iostream>

int main()
{

{
	auto a = 0;
	std::cout << a;
	std::cout << a++;
	std::cout << ++a;
	std::cout << std::endl;
}

{
	auto a = 0;
    std::cout << a << a++ << ++a << std::endl;
}

{
	auto a = 0;
	auto b = 1;
	auto c = 2;
	std::cout << a << b << c << std::endl;
}

}