#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;
}
}
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