#include <iostream>

int main() {
	int i = 0;
	i += 2;
	std::cout << i << std::endl;
	i = i + 2;
	std::cout << i << std::endl;
	++++i;
	std::cout << i << std::endl;
	(++i)++;
	std::cout << i << std::endl;
	return 0;
}